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VM: add "vm_brk()" helper function

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It does the same thing as "do_brk()", except it handles the VM locking
too.

It turns out that all external callers want that anyway, so we can make
do_brk() static to just mm/mmap.c while at it.

Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Linus Torvalds 2012-04-20 15:35:40 -07:00
parent 3b422e9c2c
commit e4eb1ff61b
6 changed files with 31 additions and 45 deletions
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3
include/linux/mm.h
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@ -1415,7 +1415,8 @@ out:
extern int do_munmap(struct mm_struct *, unsigned long, size_t);
extern unsigned long do_brk(unsigned long, unsigned long);
/* These take the mm semaphore themselves */
extern unsigned long vm_brk(unsigned long, unsigned long);
/* truncate.c */
extern void truncate_inode_pages(struct address_space *, loff_t);