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mm: Remove pointless barrier() after pmdp_get_lockless() 

pmdp_get_lockless() should itself imply any ordering required.

Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://lkml.kernel.org/r/20221022114425.298833095%40infradead.org
This commit is contained in:
Peter Zijlstra 2022-10-21 13:47:29 +02:00 committed by Dave Hansen
parent d4a72e7fe6
commit eb780dcae0
2 changed files with 0 additions and 4 deletions
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1
mm/hmm.c
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@ -362,7 +362,6 @@ static int hmm_vma_walk_pmd(pmd_t *pmdp,
* values.
*/
pmd = pmdp_get_lockless(pmdp);
barrier();
if (!pmd_devmap(pmd) && !pmd_trans_huge(pmd))
goto again;

3
mm/vmscan.c
View File

@ -4041,9 +4041,6 @@ static void walk_pmd_range(pud_t *pud, unsigned long start, unsigned long end,
for (i = pmd_index(start), addr = start; addr != end; i++, addr = next) {
pmd_t val = pmdp_get_lockless(pmd + i);
/* for pmdp_get_lockless() */
barrier();
next = pmd_addr_end(addr, end);
if (!pmd_present(val) || is_huge_zero_pmd(val)) {