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| author |   Matthew Wilcox (Oracle) <willy@infradead.org> | 2020-04-06 20:04:31 -0700 |
|---|---|---|
| committer |   Linus Torvalds <torvalds@linux-foundation.org> | 2020-04-07 10:43:38 -0700 |
| commit | a0650604a707b1926cbc32feb2f006ebb74ef47b (patch) | |
| tree | 9ccf2f46cb62ab402dd3d028f0b984ae97d40a1f /mm/rmap.c | |
| parent | mm, thp: track fallbacks due to failed memcg charges separately (diff) | |
| download | wireguard-linux-a0650604a707b1926cbc32feb2f006ebb74ef47b.tar.xz wireguard-linux-a0650604a707b1926cbc32feb2f006ebb74ef47b.zip | |
include/linux/pagemap.h: optimise find_subpage for !THP
If THP is disabled, find_subpage() can become a no-op by using
hpage_nr_pages() instead of compound_nr(). hpage_nr_pages() embeds a
check for PageTail, so we can drop the check here.
Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Acked-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Cc: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Cc: Pankaj Gupta <pankaj.gupta.linux@gmail.com>
Link: http://lkml.kernel.org/r/20200318140253.6141-5-willy@infradead.org
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm/rmap.c')
0 files changed, 0 insertions, 0 deletions