Robert Reif [Sun, 27 Apr 2008 22:18:57 +0000 (15:18 -0700)]
sparc: video drivers: add facility level
Add KERN_ facility level to sparc video drivers.
Signed-off-by: Robert Reif <reif@earthlink.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
Robert Reif [Sun, 27 Apr 2008 22:18:12 +0000 (15:18 -0700)]
sparc: tcx.c make tcx_init and tcx_exit static
Make tcx_init and tcx_exit static.
Signed-off-by: Robert Reif <reif@earthlink.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
Robert Reif [Sun, 27 Apr 2008 22:17:49 +0000 (15:17 -0700)]
sparc: ffb.c make ffb_init and ffb_exit static
Make ffb_init and ffb_exit static.
Remove unnecessary function prototype.
Signed-off-by: Robert Reif <reif@earthlink.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
Robert Reif [Sun, 27 Apr 2008 22:17:23 +0000 (15:17 -0700)]
sparc: cg14.c make cg14_init and cg15_exit static
Make cg14_init and cg14_exit static.
Signed-off-by: Robert Reif <reif@earthlink.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
Robert Reif [Sun, 27 Apr 2008 22:16:59 +0000 (15:16 -0700)]
sparc: bw2.c fix bw2_exit
Fix void function bw2_exit returning value.
Signed-off-by: Robert Reif <reif@earthlink.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
David S. Miller [Sun, 27 Apr 2008 21:54:02 +0000 (14:54 -0700)]
sparc64: Fix accidental syscall restart on child return from clone/fork/vfork.
This fixes a regression added by
238468b2ac76020c192a7402c92df5097916bf4a ("[SPARC64]: Use trap type
stored in pt_regs to handle syscall restart.")
Because we now encode the "returning from syscall" status in the
pt_regs area, we have to be mindful to zap it out in the child
of a fork.
During a parallel kernel build I saw an accidental -EINTR return
from vfork() in 'make' because of this bug.
Signed-off-by: David S. Miller <davem@davemloft.net>
David S. Miller [Sun, 27 Apr 2008 21:52:51 +0000 (14:52 -0700)]
sparc64: Clean up handling of pt_regs trap type encoding.
If we use this from more than one place, it's better to
have helpers instead of twiddling magic constants all
over.
Add pt_regs_trap_type(), pt_regs_clear_trap_type(), and
pt_regs_is_syscall().
Use them in do_signal().
Signed-off-by: David S. Miller <davem@davemloft.net>
David S. Miller [Sun, 27 Apr 2008 09:26:36 +0000 (02:26 -0700)]
sparc: Remove old style signal frame support.
Back around the same time we were bootstrapping the first 32-bit sparc
Linux kernel with a SunOS userland, we made the signal frame match
that of SunOS.
By the time we even started putting together a native Linux userland
for 32-bit Sparc we realized this layout wasn't sufficient for Linux's
needs.
Therefore we changed the layout, yet kept support for the old style
signal frame layout in there. The detection mechanism is that we had
sys_sigaction() start passing in a negative signal number to indicate
"new style signal frames please".
Anyways, no binaries exist in the world that use the old stuff. In
fact, I bet Jakub Jelinek and myself are the only two people who ever
had such binaries to be honest.
So let's get rid of this stuff.
I added an assertion using WARN_ON_ONCE() that makes sure 32-bit
applications are passing in that negative signal number still.
Signed-off-by: David S. Miller <davem@davemloft.net>
David S. Miller [Sun, 27 Apr 2008 07:25:30 +0000 (00:25 -0700)]
sparc64: Kill bogus RT_ALIGNEDSZ macro from signal.c
The structure has to be 8-byte aligned in size, so
this macro is just noise.
Signed-off-by: David S. Miller <davem@davemloft.net>
Robert Reif [Sun, 27 Apr 2008 06:10:19 +0000 (23:10 -0700)]
sparc: sunzilog.c remove unused argument
Remove unused argument in function call.
Signed-off-by: Robert Reif <reif@earthlink.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
Robert Reif [Sun, 27 Apr 2008 05:29:43 +0000 (22:29 -0700)]
sparc: fix drivers/video/tcx.c warning
Fix compile warning:
CC drivers/video/tcx.o
drivers/video/tcx.c: In function ‘tcx_init_one’:
drivers/video/tcx.c:477: warning: format ‘%lx’ expects type ‘long
unsigned int’, but argument 4 has type ‘resource_size_t’
This was the only sparc driver to use the resource directly in the
printk so I changed it to physbase like the other drivers.
Boot tested on SS4.
Signed-off-by: Robert Reif <reif@earthlink.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
David S. Miller [Sun, 27 Apr 2008 04:07:35 +0000 (21:07 -0700)]
sparc64: Kill unused local ISA bus layer.
No more drivers use this, and therefore it can die.
Signed-off-by: David S. Miller <davem@davemloft.net>
David S. Miller [Sun, 27 Apr 2008 04:02:21 +0000 (21:02 -0700)]
input: Rewrite sparcspkr device probing.
Remove all dependencies on EBUS and ISA bus layers, which we'd like to
remove as they are superfluous.
While we're here, add support for proper frequency changing on BBC
beep devices. Unlike the comments that were here, this device can
in fact use a programmable frequency.
Signed-off-by: David S. Miller <davem@davemloft.net>
David S. Miller [Sun, 27 Apr 2008 03:59:52 +0000 (20:59 -0700)]
sparc64: Do not ignore 'pmu' device ranges.
I must have disabled this due to other bugs which were fixed over
time. And this is needed in order for child devices of "pmu"
to get proper resource values.
Signed-off-by: David S. Miller <davem@davemloft.net>
David S. Miller [Sat, 26 Apr 2008 10:35:02 +0000 (03:35 -0700)]
sparc64: Kill ISA_FLOPPY_WORKS code.
This never was enabled, I could never get it working, and if anyone
wants to try and get it's very easy to reference this code in the
history.
It's the only thing referencing the silly ISA device layer in the
sparc64 tree. OF device layer infrastructure is what should be used
for these things.
Signed-off-by: David S. Miller <davem@davemloft.net>
David S. Miller [Sat, 26 Apr 2008 10:17:12 +0000 (03:17 -0700)]
sparc64: Kill CONFIG_SPARC32_COMPAT
It's completely superfluous, CONFIG_COMPAT is sufficient.
What this used to be is an umbrella for enabling code shared
by all 32-bit compat binary support types. But with the
removal of SunOS and Solaris support, the only one left is
Linux 32-bit ELF.
Update defconfig.
Signed-off-by: David S. Miller <davem@davemloft.net>
David S. Miller [Sat, 26 Apr 2008 10:07:34 +0000 (03:07 -0700)]
sparc64: Cleanups and corrections for arch/sparc64/Kconfig
Refer to chip as "SPARC" throughout.
Say 32-bit SPARC and 64-bit SPARC rather than mentioning specific
chips such like UltraSPARC, as appropriate.
Remove non-sense help text referring to things that will never appear
on a SPARC system, such as EISA busses etc.
Use "help" instead of "--help--"
Signed-off-by: David S. Miller <davem@davemloft.net>
David S. Miller [Sat, 26 Apr 2008 09:19:18 +0000 (02:19 -0700)]
sparc64: Fix wedged irq regression.
Kernel bugzilla 10273
As reported by Jos van der Ende, ever since commit
5a606b72a4309a656cd1a19ad137dc5557c4b8ea ("[SPARC64]: Do not ACK an
INO if it is disabled or inprogress.") sun4u interrupts
can get stuck.
What this changset did was add the following conditional to
the various IRQ chip ->enable() handlers on sparc64:
if (unlikely(desc->status & (IRQ_DISABLED|IRQ_INPROGRESS)))
return;
which is correct, however it means that special care is needed
in the ->enable() method.
Specifically we must put the interrupt into IDLE state during
an enable, or else it might never be sent out again.
Setting the INO interrupt state to IDLE resets the state machine,
the interrupt input to the INO is retested by the hardware, and
if an interrupt is being signalled by the device, the INO
moves back into TRANSMIT state, and an interrupt vector is sent
to the cpu.
The two sun4v IRQ chip handlers were already doing this properly,
only sun4u got it wrong.
Signed-off-by: David S. Miller <davem@davemloft.net>
Linus Torvalds [Sat, 26 Apr 2008 21:04:32 +0000 (14:04 -0700)]
Merge branch 'for-linus' of git://git./linux/kernel/git/x86/linux-2.6-x86-bigbox-bootmem-v3
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/x86/linux-2.6-x86-bigbox-bootmem-v3:
x86_64/mm: check and print vmemmap allocation continuous
x86_64: fix setup_node_bootmem to support big mem excluding with memmap
x86_64: make reserve_bootmem_generic() use new reserve_bootmem()
mm: allow reserve_bootmem() cross nodes
mm: offset align in alloc_bootmem()
mm: fix alloc_bootmem_core to use fast searching for all nodes
mm: make mem_map allocation continuous
Linus Torvalds [Sat, 26 Apr 2008 21:03:54 +0000 (14:03 -0700)]
Merge git://git./linux/kernel/git/sam/kbuild
* git://git.kernel.org/pub/scm/linux/kernel/git/sam/kbuild:
kbuild: scripts/Makefile.modpost typo fix
kbuild: soften MODULE_LICENSE check
Yinghai Lu [Sat, 12 Apr 2008 08:19:24 +0000 (01:19 -0700)]
Yinghai Lu [Tue, 18 Mar 2008 19:52:37 +0000 (12:52 -0700)]
x86_64: fix setup_node_bootmem to support big mem excluding with memmap
typical case: four sockets system, every node has 4g ram, and we are using:
memmap=10g$4g
to mask out memory on node1 and node2
when numa is enabled, early_node_mem is used to get node_data and node_bootmap.
if it can not get memory from the same node with find_e820_area(), it will
use alloc_bootmem to get buff from previous nodes.
so check it and print out some info about it.
need to move early_res_to_bootmem into every setup_node_bootmem.
and it takes range that node has. otherwise alloc_bootmem could return addr
that reserved early.
depends on "mm: make reserve_bootmem can crossed the nodes".
Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Yinghai Lu [Tue, 18 Mar 2008 19:50:21 +0000 (12:50 -0700)]
x86_64: make reserve_bootmem_generic() use new reserve_bootmem()
"mm: make reserve_bootmem can crossed the nodes" provides new
reserve_bootmem(), let reserve_bootmem_generic() use that.
reserve_bootmem_generic() is used to reserve initramdisk, so this way
we can make sure even when bootloader or kexec load ranges cross the
node memory boundaries, reserve_bootmem still works.
Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Yinghai Lu [Tue, 18 Mar 2008 19:49:12 +0000 (12:49 -0700)]
mm: allow reserve_bootmem() cross nodes
split reserve_bootmem_core() into two functions, one which checks
conflicts, and one which sets the bits.
and make reserve_bootmem to loop bdata_list to cross the nodes.
user could be crashkernel and ramdisk..., in case the range provided
by those externalities crosses the nodes.
Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Yinghai Lu [Tue, 18 Mar 2008 19:44:48 +0000 (12:44 -0700)]
mm: offset align in alloc_bootmem()
need offset alignment when node_boot_start's alignment is less than
the alignment required.
use local node_boot_start to match alignment - so don't add extra operation
in search loop.
Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Yinghai Lu [Tue, 11 Mar 2008 06:23:42 +0000 (23:23 -0700)]
mm: fix alloc_bootmem_core to use fast searching for all nodes
Make the nodes other than node 0 use bdata->last_success for fast
search too.
We need to use __alloc_bootmem_core() for vmemmap allocation for other
nodes when numa and sparsemem/vmemmap are enabled.
Also, make fail_block path increase i with incr only after ALIGN
to avoid extra increase when size is larger than align.
Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Yinghai Lu [Sun, 13 Apr 2008 18:51:06 +0000 (11:51 -0700)]
mm: make mem_map allocation continuous
vmemmap allocation currently has this layout:
[
ffffe20000000000-
ffffe200001fffff] PMD ->
ffff810001400000 on node 0
[
ffffe20000200000-
ffffe200003fffff] PMD ->
ffff810001800000 on node 0
[
ffffe20000400000-
ffffe200005fffff] PMD ->
ffff810001c00000 on node 0
[
ffffe20000600000-
ffffe200007fffff] PMD ->
ffff810002000000 on node 0
[
ffffe20000800000-
ffffe200009fffff] PMD ->
ffff810002400000 on node 0
...
note that there is a 2M hole between them - not optimal.
the root cause is that usemap (24 bytes) will be allocated after every 2M
mem_map, and it will push next vmemmap (2M) to the next (2M) alignment.
solution: try to allocate the mem_map continously.
after the patch, we get:
[
ffffe20000000000-
ffffe200001fffff] PMD ->
ffff810001400000 on node 0
[
ffffe20000200000-
ffffe200003fffff] PMD ->
ffff810001600000 on node 0
[
ffffe20000400000-
ffffe200005fffff] PMD ->
ffff810001800000 on node 0
[
ffffe20000600000-
ffffe200007fffff] PMD ->
ffff810001a00000 on node 0
[
ffffe20000800000-
ffffe200009fffff] PMD ->
ffff810001c00000 on node 0
...
which is the ideal layout.
and usemap will share a page because of they are allocated continuously too:
sparse_early_usemap_alloc: usemap =
ffff810024e00000 size = 24
sparse_early_usemap_alloc: usemap =
ffff810024e00080 size = 24
sparse_early_usemap_alloc: usemap =
ffff810024e00100 size = 24
sparse_early_usemap_alloc: usemap =
ffff810024e00180 size = 24
...
so we make the bootmem allocation more compact and use less memory
for usemap => mission accomplished ;-)
Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Linus Torvalds [Sat, 26 Apr 2008 20:46:11 +0000 (13:46 -0700)]
Merge branch 'for-linus' of git://git./linux/kernel/git/x86/linux-2.6-generic-bitops-v3
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/x86/linux-2.6-generic-bitops-v3:
x86, bitops: select the generic bitmap search functions
x86: include/asm-x86/pgalloc.h/bitops.h: checkpatch cleanups - formatting only
x86: finalize bitops unification
x86, UML: remove x86-specific implementations of find_first_bit
x86: optimize find_first_bit for small bitmaps
x86: switch 64-bit to generic find_first_bit
x86: generic versions of find_first_(zero_)bit, convert i386
bitops: use __fls for fls64 on 64-bit archs
generic: implement __fls on all 64-bit archs
generic: introduce a generic __fls implementation
x86: merge the simple bitops and move them to bitops.h
x86, generic: optimize find_next_(zero_)bit for small constant-size bitmaps
x86, uml: fix uml with generic find_next_bit for x86
x86: change x86 to use generic find_next_bit
uml: Kconfig cleanup
uml: fix build error
Linus Torvalds [Sat, 26 Apr 2008 20:44:19 +0000 (13:44 -0700)]
Merge git://git./linux/kernel/git/bart/ide-2.6
* git://git.kernel.org/pub/scm/linux/kernel/git/bart/ide-2.6: (46 commits)
ide: constify struct ide_dma_ops
ide: add struct ide_dma_ops (take 3)
ide: add IDE_HFLAG_SERIALIZE_DMA host flag
sl82c105: check bridge revision in sl82c105_init_one()
au1xxx-ide: use ->init_dma method
palm_bk3710: use ->init_dma method
sgiioc4: use ->init_dma method
icside: use ->init_dma method
ide-pmac: use ->init_dma method
ide: do complete DMA setup in ->init_dma method (take 2)
au1xxx-ide: fix MWDMA support
ide: cleanup ide_setup_dma()
ide: factor out setting PCI bus-mastering from ide_hwif_setup_dma()
ide: export ide_allocate_dma_engine()
ide: move ide_setup_dma() call out from ->init_dma method
alim15x3: skip DMA initialization completely on revs < 0x20
pdc202xx_old: remove init_dma_pdc202xx()
ide: don't display "BIOS" settings in ide_setup_dma()
ide: remove ->cds field from ide_hwif_t (take 2)
ide: remove ide_dma_iobase()
...
Linus Torvalds [Sat, 26 Apr 2008 20:29:41 +0000 (13:29 -0700)]
Merge branch 'for-linus' of git://git./linux/kernel/git/x86/linux-2.6-x86-bigbox-bootparam
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/x86/linux-2.6-x86-bigbox-bootparam:
x86, boot: Document for linked list of struct setup_data
x86, boot: export linked list of struct setup_data via debugfs
x86, boot: add linked list of struct setup_data
x86, boot: add free_early to early reservation machanism
Bartlomiej Zolnierkiewicz [Sat, 26 Apr 2008 20:25:24 +0000 (22:25 +0200)]
ide: constify struct ide_dma_ops
* Export ide_dma_exec_cmd() and __ide_dma_test_irq().
* Constify struct ide_dma_ops.
* Always set hwif->dma_ops to &sff_dma_ops in ide_setup_dma()
(it is later overriden by ide_init_port() if needed) and drop
'const struct ide_port_info *d' argument.
While at it:
* Rename __ide_dma_test_irq() to ide_dma_test_irq().
Acked-by: Sergei Shtylyov <sshtylyov@ru.mvista.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
Bartlomiej Zolnierkiewicz [Sat, 26 Apr 2008 20:25:24 +0000 (22:25 +0200)]
ide: add struct ide_dma_ops (take 3)
Add struct ide_dma_ops and convert core code + drivers to use it.
While at it:
* Drop "ide_" prefix from ->ide_dma_end and ->ide_dma_test_irq methods.
* Drop "ide_" "infixes" from DMA methods.
* au1xxx-ide.c:
- use auide_dma_{test_irq,end}() directly in auide_dma_timeout()
* pdc202xx_old.c:
- drop "old_" "infixes" from DMA methods
* siimage.c:
- add siimage_dma_test_irq() helper
- print SATA warning in siimage_init_one()
* Remove no longer needed ->init_hwif implementations.
v2:
* Changes based on review from Sergei:
- s/siimage_ide_dma_test_irq/siimage_dma_test_irq/
- s/drive->hwif/hwif/ in idefloppy_pc_intr().
- fix patch description w.r.t. au1xxx-ide changes
- fix au1xxx-ide build
- fix naming for cmd64*_dma_ops
- drop "ide_" and "old_" infixes
- s/hpt3xxx_dma_ops/hpt37x_dma_ops/
- s/hpt370x_dma_ops/hpt370_dma_ops/
- use correct DMA ops for HPT302/N, HPT371/N and HPT374
- s/it821x_smart_dma_ops/it821x_pass_through_dma_ops/
v3:
* Two bugs slipped in v2 (noticed by Sergei):
- use correct DMA ops for HPT374 (for real this time)
- handle HPT370/HPT370A properly
Acked-by: Sergei Shtylyov <sshtylyov@ru.mvista.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
Bartlomiej Zolnierkiewicz [Sat, 26 Apr 2008 20:25:24 +0000 (22:25 +0200)]
ide: add IDE_HFLAG_SERIALIZE_DMA host flag
* Add IDE_HFLAG_SERIALIZE_DMA host flag to serialize ports
if DMA is available and handle it in ide_init_port().
* Convert sl82c105 host driver to use this new flag.
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
Bartlomiej Zolnierkiewicz [Sat, 26 Apr 2008 20:25:23 +0000 (22:25 +0200)]
sl82c105: check bridge revision in sl82c105_init_one()
* Make sl82c105_bridge_revision() return 'u8' instead of 'unsigned long'.
* Check bridge revision in sl82c105_init_one().
While at:
* Use proper KERN_ level for printk().
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
Bartlomiej Zolnierkiewicz [Sat, 26 Apr 2008 20:25:23 +0000 (22:25 +0200)]
au1xxx-ide: use ->init_dma method
* Pass 'ide_hwif_t *hwif' instead of '_auide_hwif *auide' to
auide_ddma_init().
* Add 'const struct ide_port_info *d' argument to auide_ddma_init().
* Convert the driver to use ->init_dma method.
Acked-by: Sergei Shtylyov <sshtylyov@ru.mvista.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
Bartlomiej Zolnierkiewicz [Sat, 26 Apr 2008 20:25:23 +0000 (22:25 +0200)]
palm_bk3710: use ->init_dma method
* Move DMA setup to palm_bk3710_init_dma().
* Convert the driver to use ->init_dma method.
Cc: Anton Vorontsov <avorontsov@ru.mvista.com>
Acked-by: Sergei Shtylyov <sshtylyov@ru.mvista.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
Bartlomiej Zolnierkiewicz [Sat, 26 Apr 2008 20:25:23 +0000 (22:25 +0200)]
sgiioc4: use ->init_dma method
* Move dma_base check from sgiioc4_ide_setup_pci_device()
to ide_dma_sgiioc4().
* Replace ide_dma_sgiioc4() 'unsigned long dma_base' argument
by 'const struct ide_port_info *d'.
* Move hwif->INB setup from ide_init_sgiioc4() to
sgiioc4_ide_setup_pci_device().
* Move ide_init_sgiioc4() call from sgiioc4_ide_setup_pci_device()
to ide_dma_sgiioc4().
* Convert the driver to use ->init_dma method.
Cc: Jeremy Higdon <jeremy@sgi.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
Bartlomiej Zolnierkiewicz [Sat, 26 Apr 2008 20:25:23 +0000 (22:25 +0200)]
icside: use ->init_dma method
* Add 'const struct ide_port_info *d' argument to icside_dma_init().
* Make icside_dma_init() return an error value and add icside_dma_off_init()
(->init_dma implementation for case when DMA cannot be enabled).
* Convert the driver to use ->init_dma method.
Cc: Russell King <rmk@arm.linux.org.uk>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
Bartlomiej Zolnierkiewicz [Sat, 26 Apr 2008 20:25:22 +0000 (22:25 +0200)]
ide-pmac: use ->init_dma method
* Move pmif->dma_regs check from pmac_ide_setup_device() to
pmac_ide_init_dma().
* Get 'pmif' from 'hwif->hwif_data' in pmac_ide_init_dma() and replace
'pmac_ide_hwif_t *pmif' argument by 'const struct ide_port_info *d'.
* Add pmac_ide_init_dma() implementation for CONFIG_BLK_DEV_IDEDMA_PMAC=n
case and convert the driver to use ->init_dma method.
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
Bartlomiej Zolnierkiewicz [Sat, 26 Apr 2008 20:25:22 +0000 (22:25 +0200)]
ide: do complete DMA setup in ->init_dma method (take 2)
* Make ide_hwif_setup_dma() return an error value.
* Pass 'const struct ide_port_info *d' instead of 'unsigned long dmabase'
to ->init_dma method and make it return an error value.
* Rename ide_get_or_set_dma_base() to ide_pci_dma_base(),
change ordering of its arguments and then export it.
* Export ide_pci_set_master().
* Do complete DMA setup inside ->init_dma method and update ->init_dma
users accordingly.
* Sanitize code for DMA setup in ide_init_port().
v2:
* Fix for CONFIG_BLK_DEV_IDEDMA_PCI=n configs
(from Jiri Slaby <jirislaby@gmail.com>):
Fix following compiler warning by returning EINVAL:
In file included from ANYTHING-INCLUDING-IDE.H:45:
include/linux/ide.h: In function ‘ide_hwif_setup_dma’:
include/linux/ide.h:1022: warning: no return statement in function returning non-void
Cc: Jiri Slaby <jirislaby@gmail.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Acked-by: Sergei Shtylyov <sshtylyov@ru.mvista.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
Bartlomiej Zolnierkiewicz [Sat, 26 Apr 2008 20:25:22 +0000 (22:25 +0200)]
au1xxx-ide: fix MWDMA support
Always use "fast" MWDMA support and remove dma_{black,white}_list
(they were based on completely bogus ->ide_dma_check implementation
which didn't set neither the host controller timings nor the device
for the desired transfer mode).
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
Bartlomiej Zolnierkiewicz [Sat, 26 Apr 2008 20:25:21 +0000 (22:25 +0200)]
ide: cleanup ide_setup_dma()
* There is no need to call ide_release_dma_engine().
* Move the code up to (and including) ide_allocate_dma_engine()
call to the callers of ide_setup_dma().
There should be no functional changes caused by this patch.
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
Bartlomiej Zolnierkiewicz [Sat, 26 Apr 2008 20:25:21 +0000 (22:25 +0200)]
ide: factor out setting PCI bus-mastering from ide_hwif_setup_dma()
Factor out setting PCI bus-mastering from ide_hwif_setup_dma()
to ide_pci_set_master() helper.
While at it:
* don't read PCI Command register if not necessary
* use PCI device name instead of hwif->name
* cleanup ide_hwif_setup_dma() a bit
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
Bartlomiej Zolnierkiewicz [Sat, 26 Apr 2008 20:25:21 +0000 (22:25 +0200)]
ide: export ide_allocate_dma_engine()
Export ide_allocate_dma_engine() and use it in trm290 host driver.
Acked-by: Sergei Shtylyov <sshtylyov@ru.mvista.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
Bartlomiej Zolnierkiewicz [Sat, 26 Apr 2008 20:25:21 +0000 (22:25 +0200)]
ide: move ide_setup_dma() call out from ->init_dma method
There should be no functional changes caused by this patch.
Acked-by: Sergei Shtylyov <sshtylyov@ru.mvista.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
Bartlomiej Zolnierkiewicz [Sat, 26 Apr 2008 20:25:21 +0000 (22:25 +0200)]
alim15x3: skip DMA initialization completely on revs < 0x20
Skip DMA initialization completely on revs < 0x20 by setting IDE_HFLAG_NO_DMA
host flag and resetting DMA host masks in alim15x3_init_one() (currently
ide_hwif_setup_dma() will try to obtain DMA base and setup PCI bus-mastering
but init_dma_ali15x3() will fail).
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
Bartlomiej Zolnierkiewicz [Sat, 26 Apr 2008 20:25:21 +0000 (22:25 +0200)]
pdc202xx_old: remove init_dma_pdc202xx()
Do PDC202xx specific DMA initialization in init_chipset_pdc202xx()
and remove no longer needed init_dma_pdc202xx().
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
Bartlomiej Zolnierkiewicz [Sat, 26 Apr 2008 20:25:20 +0000 (22:25 +0200)]
ide: don't display "BIOS" settings in ide_setup_dma()
Nowadays BIOS info is not very useful and only confuses users since:
- IDE always tries to use DMA
- BIOS info may not be accurate with modular IDE/libata
Acked-by: Sergei Shtylyov <sshtylyov@ru.mvista.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
Bartlomiej Zolnierkiewicz [Sat, 26 Apr 2008 20:25:20 +0000 (22:25 +0200)]
ide: remove ->cds field from ide_hwif_t (take 2)
* Use hwif->name instead of cds->name in ide_allocate_dma_engine().
* Use pci_name(dev) instead of cds->name in init_dma_pdc202xx().
* Remove no longer needed ->cds field from ide_hwif_t.
v2:
* scc_pata.c also needs to be updated now (noticed by Stephen Rothwell).
There should be no functional changes caused by this patch.
Cc: Kou Ishizaki <kou.ishizaki@toshiba.co.jp>
Cc: Akira Iguchi <akira2.iguchi@toshiba.co.jp>
Cc: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
Bartlomiej Zolnierkiewicz [Sat, 26 Apr 2008 20:25:20 +0000 (22:25 +0200)]
ide: remove ide_dma_iobase()
* ide_mapped_mmio_dma() and ide_iomio_dma() are called only by
ide_dma_iobase() so inline them there.
* ide_dma_iobase() is called only by ide_setup_dma() so inline
it there.
* Setup hwif->extra_base also if hwif->mmio flag is set.
There should be no functional changes casued by this patch.
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
Bartlomiej Zolnierkiewicz [Sat, 26 Apr 2008 20:25:20 +0000 (22:25 +0200)]
ide: remove ->extra field from struct ide_port_info
Always setup hwif->extra_base in ide_iomio_dma() and remove
no longer needed ->extra field from struct ide_port_info.
There should be no functional changes caused by this patch.
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
Harvey Harrison [Sat, 26 Apr 2008 20:25:20 +0000 (22:25 +0200)]
ide: replace remaining __FUNCTION__ occurrences
__FUNCTION__ is gcc-specific, use __func__
[bart: fix checkpatch.pl errors in ide-lib.c and ppc/mpc8xx.c while at it]
Signed-off-by: Harvey Harrison <harvey.harrison@gmail.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
Borislav Petkov [Sat, 26 Apr 2008 20:25:20 +0000 (22:25 +0200)]
ide-tape: remove idetape_pipeline_active()
This function was simply a wrapper for a test_bit() macro so remove it and
use the macro instead.
Signed-off-by: Borislav Petkov <petkovbb@gmail.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
Bartlomiej Zolnierkiewicz [Sat, 26 Apr 2008 20:25:19 +0000 (22:25 +0200)]
ide: cleanup setting hwif->mmio flag
It is no longer needed to set hwif->mmio flag to tell IDE layer to not
manage resources so cleanup host drivers that used hwif->mmio flag only
for this purpose.
Ditto for ide_legacy_init_one().
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
Bartlomiej Zolnierkiewicz [Sat, 26 Apr 2008 20:25:19 +0000 (22:25 +0200)]
ide: remove ide_hwif_request_regions()
Remove no longer used ide_hwif_request_regions() and hwif_request_region().
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
Bartlomiej Zolnierkiewicz [Sat, 26 Apr 2008 20:25:19 +0000 (22:25 +0200)]
ide: manage resources for PCI devices in ide_pci_enable() (take 3)
* Reserve PCI BARs 0-3 (0-1 for single port controllers) in
ide_pci_enable() and remove ide_hwif_request_regions() call
from ide_device_add_all() (also cleanup resource management
in scc_pata host driver).
* Fix handling of PCI BAR 4 in ide_pci_enable(), then cleanup
ide_iomio_dma() (+ init_hwif_trm290() in trm290 host driver)
and remove ide_release[_iomio]_dma().
v2:
* Fixup trm290 host driver.
v3:
* Because of scc_pata host driver changes we need to call
pci_request_selected_regions() also in setup_mmio_scc().
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
Bartlomiej Zolnierkiewicz [Sat, 26 Apr 2008 20:25:19 +0000 (22:25 +0200)]
cmd640: manage I/O resources in driver
* Tell IDE layer to not manage resources by setting hwif->mmio flag.
* Use {request,release}_region() for resources management.
* Use driver name for resources management.
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
Bartlomiej Zolnierkiewicz [Sat, 26 Apr 2008 20:25:18 +0000 (22:25 +0200)]
ide: manage I/O resources in ide_legacy_init_one()
* Tell IDE layer to not manage resources by setting hwif->mmio flag.
* Use {request,release}_region() for resources management.
* Set ->name field of 'struct ide_port_info' instances in legacy VLB
host drivers and use driver name for resources management.
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
Bartlomiej Zolnierkiewicz [Sat, 26 Apr 2008 20:25:18 +0000 (22:25 +0200)]
ide: add ide_legacy_init_one() helper
Move the common code for primary/seconary port setup from
ide_legacy_device_add() to ide_legacy_init_one().
There should be no functional changes caused by this patch.
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
Bartlomiej Zolnierkiewicz [Sat, 26 Apr 2008 20:25:18 +0000 (22:25 +0200)]
ide_arm: manage I/O resources in driver
* Tell IDE layer to not manage resources by setting hwif->mmio flag.
* Use {request,release}_region() for resources management.
* Use driver name for resources management.
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
Bartlomiej Zolnierkiewicz [Sat, 26 Apr 2008 20:25:18 +0000 (22:25 +0200)]
ide-4drives: manage I/O resources in driver
* Tell IDE layer to not manage resources by setting hwif->mmio flag.
* Use {request,release}_region() for resources management.
* Use driver name for resources management.
* Remove no longer needed 'hwif->chipset == ide_4drives' handling
from ide_device_add_all().
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
Bartlomiej Zolnierkiewicz [Sat, 26 Apr 2008 20:25:17 +0000 (22:25 +0200)]
ide-generic: manage I/O resources in driver
* Tell IDE layer to not manage resources by setting hwif->mmio flag.
* Use {request,release}_region() for resources management.
* Use driver name for resources management.
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
Bartlomiej Zolnierkiewicz [Sat, 26 Apr 2008 20:25:17 +0000 (22:25 +0200)]
ide: remove ide_hwif_release_regions()
All host drivers using ide_unregister()/module_exit() have been fixed
to manage resources themselves so this function can be removed now.
There should be no functional changes caused by this patch.
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
Bartlomiej Zolnierkiewicz [Sat, 26 Apr 2008 20:25:17 +0000 (22:25 +0200)]
ide: register ports with non-present devices (for warm-plug)
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
Bartlomiej Zolnierkiewicz [Sat, 26 Apr 2008 20:25:17 +0000 (22:25 +0200)]
ide-cs: manage I/O resources in driver
* Make idecs_register() return pointer to hwif structure instead of
hwif's index.
* Store pointer to hwif structure instead of hwif's index in ide_info_t
(fixes ide-cs for IDE[6-9]_MAJOR major numbers).
* Remove no longer needed ide_major[].
* Tell IDE layer to not manage resources by setting hwif->mmio flag.
* Use {request,release}_region() for resources management.
* Use driver name for resources management.
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
Bartlomiej Zolnierkiewicz [Sat, 26 Apr 2008 20:25:16 +0000 (22:25 +0200)]
ide-pnp: manage I/O resources in driver
* Tell IDE layer to not manage resources by setting hwif->mmio flag.
* Use {request,release}_region() for resources management.
* Use driver name for resources management.
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
Bartlomiej Zolnierkiewicz [Sat, 26 Apr 2008 20:25:16 +0000 (22:25 +0200)]
qd65xx: cleanup qd_probe()
* Replace 'if ()'-s by 'switch ()' block.
* Merge common code for QD6500/QD6580A/QD6580B.
There should be no functional changes caused by this patch.
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
Bartlomiej Zolnierkiewicz [Sat, 26 Apr 2008 20:25:16 +0000 (22:25 +0200)]
ide: use ide_legacy_device_add() for qd65xx (take 2)
* Add 'unsigned long config' argument to ide_legacy_device_add()
for setting hwif->config_data.
* Use ide_find_port_slot() instead of ide_find_port() in
ide_legacy_device_add().
* Handle IDE_HFLAG_QD_2ND_PORT and IDE_HFLAG_SINGLE host flags in
ide_legacy_device_add().
* Convert qd65xx host driver to use ide_legacy_device_add().
v2:
* Update ali14xx, dtc2278, ht6560b and umc8672 host drivers.
There should be no functional changes caused by this patch.
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
Bartlomiej Zolnierkiewicz [Sat, 26 Apr 2008 20:25:16 +0000 (22:25 +0200)]
ide: add ide_legacy_device_add() helper
Add ide_legacy_device_add() helper for use by legacy VLB host drivers
(+ convert them to use it).
There should be no functional changes caused by this patch.
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
Bartlomiej Zolnierkiewicz [Sat, 26 Apr 2008 20:25:16 +0000 (22:25 +0200)]
ide: remove ->noprobe field from ide_hwif_t
Update IDE PMAC host driver to use drive->noprobe instead of hwif->noprobe
and remove hwif->noprobe completely (it is always set to zero now).
There should be no functional changes caused by this patch.
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
Borislav Petkov [Sat, 26 Apr 2008 20:25:15 +0000 (22:25 +0200)]
ide-cd: fix remaining checkpatch.pl issues
Some of them are:
WARNING: braces {} are not necessary for single statement blocks
CHECK: multiple assignments should be avoided
WARNING: printk() should include KERN_ facility level
WARNING: no space between function name and open parenthesis '('
[bart: minor fixups]
Signed-off-by: Borislav Petkov <petkovbb@gmail.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
Borislav Petkov [Sat, 26 Apr 2008 20:25:15 +0000 (22:25 +0200)]
ide-cd: shorten lines longer than 80 columns
[bart: minor fixups]
Signed-off-by: Borislav Petkov <petkovbb@gmail.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
Borislav Petkov [Sat, 26 Apr 2008 20:25:15 +0000 (22:25 +0200)]
ide-cd: fixup comments
[bart: minor fixups, md5sum checked]
Signed-off-by: Borislav Petkov <petkovbb@gmail.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
Borislav Petkov [Sat, 26 Apr 2008 20:25:15 +0000 (22:25 +0200)]
ide-cd: put all proc-related code at one place
Signed-off-by: Borislav Petkov <petkovbb@gmail.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
Borislav Petkov [Sat, 26 Apr 2008 20:25:15 +0000 (22:25 +0200)]
ide-cd: include proper headers
Signed-off-by: Borislav Petkov <petkovbb@gmail.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
Bartlomiej Zolnierkiewicz [Sat, 26 Apr 2008 20:25:14 +0000 (22:25 +0200)]
ide: add struct ide_port_ops (take 2)
* Move hooks for port/host specific methods from ide_hwif_t to
'struct ide_port_ops'.
* Add 'const struct ide_port_ops *port_ops' to 'struct ide_port_info'
and ide_hwif_t.
* Update host drivers and core code accordingly.
While at it:
* Rename ata66_*() cable detect functions to *_cable_detect() to match
the standard naming. (Suggested by Sergei Shtylyov)
v2:
* Fix build for bast-ide. (Noticed by Andrew Morton)
Acked-by: Sergei Shtylyov <sshtylyov@ru.mvista.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
Huang, Ying [Fri, 28 Mar 2008 02:49:50 +0000 (10:49 +0800)]
x86, boot: Document for linked list of struct setup_data
Documentation for linked list of struct setup_data.
Signed-off-by: Huang Ying <ying.huang@intel.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Huang, Ying [Fri, 28 Mar 2008 02:49:48 +0000 (10:49 +0800)]
x86, boot: export linked list of struct setup_data via debugfs
Export linked list of struct setup_data via debugfs.
Signed-off-by: Huang Ying <ying.huang@intel.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Huang, Ying [Fri, 28 Mar 2008 02:49:44 +0000 (10:49 +0800)]
x86, boot: add linked list of struct setup_data
This patch adds a field of 64-bit physical pointer to NULL terminated
single linked list of struct setup_data to real-mode kernel
header. This is used as a more extensible boot parameters passing
mechanism.
Signed-off-by: Huang Ying <ying.huang@intel.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Huang, Ying [Fri, 28 Mar 2008 02:49:42 +0000 (10:49 +0800)]
x86, boot: add free_early to early reservation machanism
Add free_early to early reservation mechanism - this way early bootup
failure paths can stop wasting memory.
Signed-off-by: Huang Ying <ying.huang@intel.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Venki Pallipadi [Sat, 26 Apr 2008 18:32:12 +0000 (11:32 -0700)]
x86, PAT: disable /dev/mem mmap RAM with PAT
disable /dev/mem mmap of RAM with PAT. It makes things safer and
eliminates aliasing. A future improvement would be to avoid the
range_is_allowed duplication.
Signed-off-by: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Adrian Bunk [Fri, 25 Apr 2008 20:40:16 +0000 (23:40 +0300)]
kbuild: scripts/Makefile.modpost typo fix
-EVIUSER ;-)
Signed-off-by: Adrian Bunk <bunk@kernel.org>
Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Sam Ravnborg [Sat, 26 Apr 2008 19:07:26 +0000 (21:07 +0200)]
kbuild: soften MODULE_LICENSE check
Only modules that has other MODULE_* content
shall have the MODULE_LICENSE() tag.
This fixes allmodconfig build on my box.
Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Alexander van Heukelum [Fri, 25 Apr 2008 11:12:53 +0000 (13:12 +0200)]
x86, bitops: select the generic bitmap search functions
Introduce GENERIC_FIND_FIRST_BIT and GENERIC_FIND_NEXT_BIT in
lib/Kconfig, defaulting to off. An arch that wants to use the
generic implementation now only has to use a select statement
to include them.
I added an always-y option (X86_CPU) to arch/x86/Kconfig.cpu
and used that to select the generic search functions. This
way ARCH=um SUBARCH=i386 automatically picks up the change
too, and arch/um/Kconfig.i386 can therefore be simplified a
bit. ARCH=um SUBARCH=x86_64 does things differently, but
still compiles fine. It seems that a "def_bool y" always
wins over a "def_bool n"?
Signed-off-by: Alexander van Heukelum <heukelum@fastmail.fm>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Joe Perches [Sun, 23 Mar 2008 08:03:07 +0000 (01:03 -0700)]
x86: include/asm-x86/pgalloc.h/bitops.h: checkpatch cleanups - formatting only
Signed-off-by: Joe Perches <joe@perches.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Alexander van Heukelum [Fri, 4 Apr 2008 18:49:30 +0000 (20:49 +0200)]
x86: finalize bitops unification
include/asm-x86/bitops_32.h and include/asm-x86/bitops_64.h are now
almost identical. The 64-bit version sets ARCH_HAS_FAST_MULTIPLIER
and has an extra inline function set_bit_string. The define currently
has no influence on the generated code, but it can be argued that
setting it on i386 is the right thing to do anyhow. The addition
of the extra inline function on i386 does not hurt either.
Signed-off-by: Alexander van Heukelum <heukelum@fastmail.fm>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Alexander van Heukelum [Tue, 1 Apr 2008 15:47:57 +0000 (17:47 +0200)]
x86, UML: remove x86-specific implementations of find_first_bit
x86 has been switched to the generic versions of find_first_bit
and find_first_zero_bit, but the original versions were retained.
This patch just removes the now unused x86-specific versions.
also update UML.
Signed-off-by: Alexander van Heukelum <heukelum@fastmail.fm>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Alexander van Heukelum [Tue, 1 Apr 2008 15:42:21 +0000 (17:42 +0200)]
x86: optimize find_first_bit for small bitmaps
Avoid a call to find_first_bit if the bitmap size is know at
compile time and small enough to fit in a single long integer.
Modeled after an optimization in the original x86_64-specific
code.
Signed-off-by: Alexander van Heukelum <heukelum@fastmail.fm>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Alexander van Heukelum [Tue, 1 Apr 2008 15:41:26 +0000 (17:41 +0200)]
x86: switch 64-bit to generic find_first_bit
Switch x86_64 to generic find_first_bit. The x86_64-specific
implementation is not removed.
Signed-off-by: Alexander van Heukelum <heukelum@fastmail.fm>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Alexander van Heukelum [Tue, 1 Apr 2008 09:46:19 +0000 (11:46 +0200)]
x86: generic versions of find_first_(zero_)bit, convert i386
Generic versions of __find_first_bit and __find_first_zero_bit
are introduced as simplified versions of __find_next_bit and
__find_next_zero_bit. Their compilation and use are guarded by
a new config variable GENERIC_FIND_FIRST_BIT.
The generic versions of find_first_bit and find_first_zero_bit
are implemented in terms of the newly introduced __find_first_bit
and __find_first_zero_bit.
This patch does not remove the i386-specific implementation,
but it does switch i386 to use the generic functions by setting
GENERIC_FIND_FIRST_BIT=y for X86_32.
Signed-off-by: Alexander van Heukelum <heukelum@fastmail.fm>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Alexander van Heukelum [Sat, 15 Mar 2008 17:32:36 +0000 (18:32 +0100)]
bitops: use __fls for fls64 on 64-bit archs
Use __fls for fls64 on 64-bit archs. The implementation for
64-bit archs is moved from x86_64 to asm-generic.
Signed-off-by: Alexander van Heukelum <heukelum@fastmail.fm>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Alexander van Heukelum [Sat, 15 Mar 2008 17:31:49 +0000 (18:31 +0100)]
generic: implement __fls on all 64-bit archs
Implement __fls on all 64-bit archs:
alpha has an implementation of fls64.
Added __fls(x) = fls64(x) - 1.
ia64 has fls, but not __fls.
Added __fls based on code of fls.
mips and powerpc have __ilog2, which is the same as __fls.
Added __fls = __ilog2.
parisc, s390, sh and sparc64:
Include generic __fls.
x86_64 already has __fls.
Signed-off-by: Alexander van Heukelum <heukelum@fastmail.fm>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Alexander van Heukelum [Sat, 15 Mar 2008 17:30:57 +0000 (18:30 +0100)]
generic: introduce a generic __fls implementation
Add a generic __fls implementation in the same spirit as
the generic __ffs one. It finds the last (most significant)
set bit in the given long value.
Signed-off-by: Alexander van Heukelum <heukelum@fastmail.fm>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Alexander van Heukelum [Sat, 15 Mar 2008 12:04:42 +0000 (13:04 +0100)]
x86: merge the simple bitops and move them to bitops.h
Some of those can be written in such a way that the same
inline assembly can be used to generate both 32 bit and
64 bit code.
For ffs and fls, x86_64 unconditionally used the cmov
instruction and i386 unconditionally used a conditional
branch over a mov instruction. In the current patch I
chose to select the version based on the availability
of the cmov instruction instead. A small detail here is
that x86_64 did not previously set CONFIG_X86_CMOV=y.
Improved comments for ffs, ffz, fls and variations.
Signed-off-by: Alexander van Heukelum <heukelum@fastmail.fm>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Alexander van Heukelum [Tue, 11 Mar 2008 15:17:19 +0000 (16:17 +0100)]
x86, generic: optimize find_next_(zero_)bit for small constant-size bitmaps
This moves an optimization for searching constant-sized small
bitmaps form x86_64-specific to generic code.
On an i386 defconfig (the x86#testing one), the size of vmlinux hardly
changes with this applied. I have observed only four places where this
optimization avoids a call into find_next_bit:
In the functions return_unused_surplus_pages, alloc_fresh_huge_page,
and adjust_pool_surplus, this patch avoids a call for a 1-bit bitmap.
In __next_cpu a call is avoided for a 32-bit bitmap. That's it.
On x86_64, 52 locations are optimized with a minimal increase in
code size:
Current #testing defconfig:
146 x bsf, 27 x find_next_*bit
text data bss dec hex filename
5392637 846592 724424
6963653 6a41c5 vmlinux
After removing the x86_64 specific optimization for find_next_*bit:
94 x bsf, 79 x find_next_*bit
text data bss dec hex filename
5392358 846592 724424
6963374 6a40ae vmlinux
After this patch (making the optimization generic):
146 x bsf, 27 x find_next_*bit
text data bss dec hex filename
5392396 846592 724424
6963412 6a40d4 vmlinux
[ tglx@linutronix.de: build fixes ]
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Alexander van Heukelum [Thu, 13 Mar 2008 17:53:52 +0000 (18:53 +0100)]
x86, uml: fix uml with generic find_next_bit for x86
Update UML to use the generic bits too.
Signed-off-by: Alexander van Heukelum <heukelum@fastmail.fm>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Alexander van Heukelum [Sun, 9 Mar 2008 20:01:04 +0000 (21:01 +0100)]
x86: change x86 to use generic find_next_bit
The versions with inline assembly are in fact slower on the machines I
tested them on (in userspace) (Athlon XP 2800+, p4-like Xeon 2.8GHz, AMD
Opteron 270). The i386-version needed a fix similar to
06024f21 to avoid
crashing the benchmark.
Benchmark using: gcc -fomit-frame-pointer -Os. For each bitmap size
1...512, for each possible bitmap with one bit set, for each possible
offset: find the position of the first bit starting at offset. If you
follow ;). Times include setup of the bitmap and checking of the
results.
Athlon Xeon Opteron 32/64bit
x86-specific: 0m3.692s 0m2.820s 0m3.196s / 0m2.480s
generic: 0m2.622s 0m1.662s 0m2.100s / 0m1.572s
If the bitmap size is not a multiple of BITS_PER_LONG, and no set
(cleared) bit is found, find_next_bit (find_next_zero_bit) returns a
value outside of the range [0, size]. The generic version always returns
exactly size. The generic version also uses unsigned long everywhere,
while the x86 versions use a mishmash of int, unsigned (int), long and
unsigned long.
Using the generic version does give a slightly bigger kernel, though.
defconfig: text data bss dec hex filename
x86-specific:
4738555 481232 626688
5846475 5935cb vmlinux (32 bit)
generic:
4738621 481232 626688
5846541 59360d vmlinux (32 bit)
x86-specific:
5392395 846568 724424
6963387 6a40bb vmlinux (64 bit)
generic:
5392458 846568 724424
6963450 6a40fa vmlinux (64 bit)
Signed-off-by: Alexander van Heukelum <heukelum@fastmail.fm>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Ingo Molnar [Sat, 26 Apr 2008 17:10:17 +0000 (19:10 +0200)]
uml: Kconfig cleanup
pointed out by Linus: arch/um/Kconfig.x86_64 should
include arch/x86/Kconfig.cpu instead of defining those
symbols itself.
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Ingo Molnar [Sat, 26 Apr 2008 16:59:42 +0000 (18:59 +0200)]
uml: fix build error
fix:
arch/um/os-Linux/helper.c: In function 'run_helper':
arch/um/os-Linux/helper.c:73: error: 'PATH_MAX' undeclared (first use in this function)
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Linus Torvalds [Sat, 26 Apr 2008 16:50:58 +0000 (09:50 -0700)]
Merge branch 'for-linus' of git://git./linux/kernel/git/x86/linux-2.6-x86-fixes
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/x86/linux-2.6-x86-fixes:
x86 PAT: decouple from nonpromisc devmem
x86 PAT: tone down debugging messages