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mm/mlock: use offset_in_page macro

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linux/mm.h provides offset_in_page() macro.  Let's use already predefined
macro instead of (addr & ~PAGE_MASK).

Signed-off-by: Alexander Kuleshov <kuleshovmail@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Alexander Kuleshov 2015-11-05 18:46:49 -08:00 committed by Linus Torvalds
parent ea53cde089
commit 8fd9e4883a
1 changed files with 3 additions and 3 deletions
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6
mm/mlock.c
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@ -560,7 +560,7 @@ static int do_mlock(unsigned long start, size_t len, int on)
struct vm_area_struct * vma, * prev;
int error;
VM_BUG_ON(start & ~PAGE_MASK);
VM_BUG_ON(offset_in_page(start));
VM_BUG_ON(len != PAGE_ALIGN(len));
end = start + len;
if (end < start)
@ -616,7 +616,7 @@ SYSCALL_DEFINE2(mlock, unsigned long, start, size_t, len)
lru_add_drain_all(); /* flush pagevec */
len = PAGE_ALIGN(len + (start & ~PAGE_MASK));
len = PAGE_ALIGN(len + (offset_in_page(start)));
start &= PAGE_MASK;
lock_limit = rlimit(RLIMIT_MEMLOCK);
@ -645,7 +645,7 @@ SYSCALL_DEFINE2(munlock, unsigned long, start, size_t, len)
{
int ret;
len = PAGE_ALIGN(len + (start & ~PAGE_MASK));
len = PAGE_ALIGN(len + (offset_in_page(start)));
start &= PAGE_MASK;
down_write(&current->mm->mmap_sem);