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ksm: remove dedicated macro KSM_FLAG_MASK 

The macro KSM_FLAG_MASK is used in rmap_walk_ksm() only.  So we can
replace ~KSM_FLAG_MASK with PAGE_MASK to remove this dedicated macro and
make code more consistent because PAGE_MASK is used elsewhere in this
file.

Link: https://lkml.kernel.org/r/20210330140228.45635-4-linmiaohe@huawei.com
Signed-off-by: Miaohe Lin <linmiaohe@huawei.com>
Cc: Hugh Dickins <hughd@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Miaohe Lin 2021-05-04 18:37:42 -07:00 committed by Linus Torvalds
parent 3e96b6a2e9
commit cd7fae2602
1 changed files with 1 additions and 3 deletions
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4
mm/ksm.c
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@ -215,8 +215,6 @@ struct rmap_item {
#define SEQNR_MASK 0x0ff /* low bits of unstable tree seqnr */
#define UNSTABLE_FLAG 0x100 /* is a node of the unstable tree */
#define STABLE_FLAG 0x200 /* is listed from the stable tree */
#define KSM_FLAG_MASK (SEQNR_MASK|UNSTABLE_FLAG|STABLE_FLAG)
/* to mask all the flags */
/* The stable and unstable tree heads */
static struct rb_root one_stable_tree[1] = { RB_ROOT };
@ -2631,7 +2629,7 @@ again:
vma = vmac->vma;
/* Ignore the stable/unstable/sqnr flags */
addr = rmap_item->address & ~KSM_FLAG_MASK;
addr = rmap_item->address & PAGE_MASK;
if (addr < vma->vm_start || addr >= vma->vm_end)
continue;