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thp: update split_huge_page_pmd() comment 

According to 78ddc53473 ("thp: rename split_huge_page_pmd() to
split_huge_pmd()"), update related comment.

Link: http://lkml.kernel.org/r/20190731033406.185285-1-wangkefeng.wang@huawei.com
Signed-off-by: Kefeng Wang <wangkefeng.wang@huawei.com>
Cc: "Kirill A . Shutemov" <kirill.shutemov@linux.intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Kefeng Wang 2019-09-23 15:37:41 -07:00 committed by Linus Torvalds
parent 276f756d70
commit 9ef258bad7
2 changed files with 3 additions and 4 deletions
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2
arch/powerpc/mm/book3s64/hash_utils.c
View File

@ -1748,7 +1748,7 @@ void flush_hash_hugepage(unsigned long vsid, unsigned long addr,
/* /*
* IF we try to do a HUGE PTE update after a withdraw is done. * IF we try to do a HUGE PTE update after a withdraw is done.
* we will find the below NULL. This happens when we do * we will find the below NULL. This happens when we do
* split_huge_page_pmd * split_huge_pmd
*/ */
if (!hpte_slot_array) if (!hpte_slot_array)
return; return;

5
include/asm-generic/pgtable.h
View File

@ -1002,9 +1002,8 @@ static inline int pmd_none_or_trans_huge_or_clear_bad(pmd_t *pmd)
* need this). If THP is not enabled, the pmd can't go away under the * need this). If THP is not enabled, the pmd can't go away under the
* code even if MADV_DONTNEED runs, but if THP is enabled we need to * code even if MADV_DONTNEED runs, but if THP is enabled we need to
* run a pmd_trans_unstable before walking the ptes after * run a pmd_trans_unstable before walking the ptes after
* split_huge_page_pmd returns (because it may have run when the pmd * split_huge_pmd returns (because it may have run when the pmd become
* become null, but then a page fault can map in a THP and not a * null, but then a page fault can map in a THP and not a regular page).
* regular page).
*/ */
static inline int pmd_trans_unstable(pmd_t *pmd) static inline int pmd_trans_unstable(pmd_t *pmd)
{ {