Messages in this thread | | | Date | Tue, 24 Mar 2015 15:42:56 +0100 | From | Christian Borntraeger <> | Subject | Re: [PATCH] mm: Remove usages of ACCESS_ONCE |
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Am 23.03.2015 um 23:44 schrieb Jason Low: > Commit 38c5ce936a08 converted ACCESS_ONCE usage in gup_pmd_range() to > READ_ONCE, since ACCESS_ONCE doesn't work reliably on non-scalar types. > > This patch removes the rest of the usages of ACCESS_ONCE, and use > READ_ONCE for the read accesses. This also makes things cleaner, > instead of using separate/multiple sets of APIs. > > Signed-off-by: Jason Low <jason.low2@hp.com>
Reviewed-by: Christian Borntraeger <borntraeger@de.ibm.com>
one remark or question:
> - anon_mapping = (unsigned long) ACCESS_ONCE(page->mapping); > + anon_mapping = (unsigned long)READ_ONCE(page->mapping);
Were the white space changes intentional? IIRC checkpatch does prefer it your way and you have changed several places - so I assume yes. Either way, its probably fine to change that along.
Christian
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