+ mm-mlock-use-offset_in_page-macro.patch added to -mm tree

[akpm@xxxxxxxxxxxxxxxxxxxx]

The patch titled
     Subject: mm/mlock: use offset_in_page macro
has been added to the -mm tree.  Its filename is
     mm-mlock-use-offset_in_page-macro.patch

This patch should soon appear at
    http://ozlabs.org/~akpm/mmots/broken-out/mm-mlock-use-offset_in_page-macro.patch
and later at
    http://ozlabs.org/~akpm/mmotm/broken-out/mm-mlock-use-offset_in_page-macro.patch

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------------------------------------------------------
From: Alexander Kuleshov <kuleshovmail@xxxxxxxxx>
Subject: mm/mlock: use offset_in_page macro

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>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---

 mm/mlock.c |    6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff -puN mm/mlock.c~mm-mlock-use-offset_in_page-macro mm/mlock.c
--- a/mm/mlock.c~mm-mlock-use-offset_in_page-macro
+++ a/mm/mlock.c
@@ -560,7 +560,7 @@ static int do_mlock(unsigned long start,
 	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, st
 
 	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,
 {
 	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);
_

Patches currently in -mm which might be from kuleshovmail@xxxxxxxxx are

mm-msync-use-offset_in_page-macro.patch
mm-nommu-use-offset_in_page-macro.patch
mm-mincore-use-offset_in_page-macro.patch
mm-early_ioremap-use-offset_in_page-macro.patch
mm-percpu-use-offset_in_page-macro.patch
mm-util-use-offset_in_page-macro.patch
mm-mlock-use-offset_in_page-macro.patch
mm-vmalloc-use-offset_in_page-macro.patch
mm-mmap-use-offset_in_page-macro.patch
mm-mremap-use-offset_in_page-macro.patch
lib-halfmd4-use-rol32-inline-function-in-the-round-macro.patch

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