X-Git-Url: http://plrg.eecs.uci.edu/git/?a=blobdiff_plain;f=include%2Flinux%2Fbitops.h;h=abc9ca7784568ba5737add4fce84577348428eac;hb=f9300eaaac1ca300083ad41937923a90cc3a2394;hp=a3b6b82108b9ad239dd1dda1abe6c8e3f585d3b3;hpb=6ac1ef482d7ae0c690f1640bf6eb818ff9a2d91e;p=firefly-linux-kernel-4.4.55.git

diff --git a/include/linux/bitops.h b/include/linux/bitops.h
index a3b6b82108b9..abc9ca778456 100644
--- a/include/linux/bitops.h
+++ b/include/linux/bitops.h
@@ -4,12 +4,23 @@
 
 #ifdef	__KERNEL__
 #define BIT(nr)			(1UL << (nr))
+#define BIT_ULL(nr)		(1ULL << (nr))
 #define BIT_MASK(nr)		(1UL << ((nr) % BITS_PER_LONG))
 #define BIT_WORD(nr)		((nr) / BITS_PER_LONG)
+#define BIT_ULL_MASK(nr)	(1ULL << ((nr) % BITS_PER_LONG_LONG))
+#define BIT_ULL_WORD(nr)	((nr) / BITS_PER_LONG_LONG)
 #define BITS_PER_BYTE		8
 #define BITS_TO_LONGS(nr)	DIV_ROUND_UP(nr, BITS_PER_BYTE * sizeof(long))
 #endif
 
+/*
+ * Create a contiguous bitmask starting at bit position @l and ending at
+ * position @h. For example
+ * GENMASK_ULL(39, 21) gives us the 64bit vector 0x000000ffffe00000.
+ */
+#define GENMASK(h, l)		(((U32_C(1) << ((h) - (l) + 1)) - 1) << (l))
+#define GENMASK_ULL(h, l)	(((U64_C(1) << ((h) - (l) + 1)) - 1) << (l))
+
 extern unsigned int __sw_hweight8(unsigned int w);
 extern unsigned int __sw_hweight16(unsigned int w);
 extern unsigned int __sw_hweight32(unsigned int w);