The <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@xxxxxxxxx>
---
mm/mlock.c | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)
diff --git a/mm/mlock.c b/mm/mlock.c
index 25936680..e86206b 100644
--- a/mm/mlock.c
+++ b/mm/mlock.c
@@ -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(¤t->mm->mmap_sem);
--
2.5.0
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