linux-kernel - [PATCH] mm/huge_memory: fix comment in __split_huge_pmd

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Date:   Thu, 7 Dec 2017 13:49:05 +0800
From:   Yisheng Xie <xieyisheng1@...wei.com>
To:     <akpm@...ux-foundation.org>
CC:     <kirill.shutemov@...ux.intel.com>, <mhocko@...e.com>,
        <minchan@...nel.org>, <linux-mm@...ck.org>,
        <linux-kernel@...r.kernel.org>
Subject: [PATCH] mm/huge_memory: fix comment in __split_huge_pmd_locked

pmd_trans_splitting has been remove after THP refcounting redesign,
therefore related comment should be updated.

Signed-off-by: Yisheng Xie <xieyisheng1@...wei.com>
---
 mm/huge_memory.c | 7 +++----
 1 file changed, 3 insertions(+), 4 deletions(-)

diff --git a/mm/huge_memory.c b/mm/huge_memory.c
index 86fe697..f2467a0 100644
--- a/mm/huge_memory.c
+++ b/mm/huge_memory.c
@@ -2215,10 +2215,9 @@ static void __split_huge_pmd_locked(struct vm_area_struct *vma, pmd_t *pmd,
 	 * for the same virtual address to be loaded simultaneously. So instead
 	 * of doing "pmd_populate(); flush_pmd_tlb_range();" we first mark the
 	 * current pmd notpresent (atomically because here the pmd_trans_huge
-	 * and pmd_trans_splitting must remain set at all times on the pmd
-	 * until the split is complete for this pmd), then we flush the SMP TLB
-	 * and finally we write the non-huge version of the pmd entry with
-	 * pmd_populate.
+	 * must remain set at all times on the pmd until the split is complete
+	 * for this pmd), then we flush the SMP TLB and finally we write the
+	 * non-huge version of the pmd entry with pmd_populate.
 	 */
 	pmdp_invalidate(vma, haddr, pmd);
 	pmd_populate(mm, pmd, pgtable);
-- 
1.7.12.4