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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>
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4
mm/ksm.c
4
mm/ksm.c
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@ -215,8 +215,6 @@ struct rmap_item {
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#define SEQNR_MASK 0x0ff /* low bits of unstable tree seqnr */
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#define UNSTABLE_FLAG 0x100 /* is a node of the unstable tree */
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#define STABLE_FLAG 0x200 /* is listed from the stable tree */
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#define KSM_FLAG_MASK (SEQNR_MASK|UNSTABLE_FLAG|STABLE_FLAG)
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/* to mask all the flags */
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/* The stable and unstable tree heads */
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static struct rb_root one_stable_tree[1] = { RB_ROOT };
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@ -2631,7 +2629,7 @@ void rmap_walk_ksm(struct page *page, struct rmap_walk_control *rwc)
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vma = vmac->vma;
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/* Ignore the stable/unstable/sqnr flags */
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addr = rmap_item->address & ~KSM_FLAG_MASK;
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addr = rmap_item->address & PAGE_MASK;
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if (addr < vma->vm_start || addr >= vma->vm_end)
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continue;
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