fs/proc/kcore.c: don't add modules range to kcore if it's equal to vmcore range
authorBaoquan He <bhe@redhat.com>
Thu, 9 Oct 2014 22:25:56 +0000 (15:25 -0700)
committerLinus Torvalds <torvalds@linux-foundation.org>
Fri, 10 Oct 2014 02:25:50 +0000 (22:25 -0400)
commitbf3e2692468fe46eed57d18b3dd1af5b30049122
treeb376556f8a86c27066a849e469a940c2a6d764d0
parent58cb65487e92b47448d00a711c9f5922137d5678
fs/proc/kcore.c: don't add modules range to kcore if it's equal to vmcore range

On some ARCHs modules range is eauql to vmalloc range. E.g on i686

"#define MODULES_VADDR   VMALLOC_START"
"#define MODULES_END     VMALLOC_END"

This will cause 2 duplicate program segments in /proc/kcore, and no flag
to indicate they are different.  This is confusing.  And usually people
who need check the elf header or read the content of kcore will check
memory ranges.  Two program segments which are the same are unnecessary.

So check if the modules range is equal to vmalloc range.  If so, just skip
adding the modules range.

[akpm@linux-foundation.org: coding-style fixes]
Signed-off-by: Baoquan He <bhe@redhat.com>
Cc: Xishi Qiu <qiuxishi@huawei.com>
Cc: Paul Gortmaker <paul.gortmaker@windriver.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
fs/proc/kcore.c