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| author |   Joonsoo Kim <iamjoonsoo.kim@lge.com> | 2016-05-19 17:10:49 -0700 |
|---|---|---|
| committer |   Linus Torvalds <torvalds@linux-foundation.org> | 2016-05-19 19:12:14 -0700 |
| commit | 0139aa7b7fa12ceef095d99dc36606a5b10ab83a (patch) | |
| tree | 94da74f2f79911a11a3c7c34f73ba971dec41a7e /arch/tile | |
| parent | mm/page_ref: use page_ref helper instead of direct modification of _count (diff) | |
| download | linux-dev-0139aa7b7fa12ceef095d99dc36606a5b10ab83a.tar.xz linux-dev-0139aa7b7fa12ceef095d99dc36606a5b10ab83a.zip | |
mm: rename _count, field of the struct page, to _refcount
Many developers already know that field for reference count of the
struct page is _count and atomic type. They would try to handle it
directly and this could break the purpose of page reference count
tracepoint. To prevent direct _count modification, this patch rename it
to _refcount and add warning message on the code. After that, developer
who need to handle reference count will find that field should not be
accessed directly.
[akpm@linux-foundation.org: fix comments, per Vlastimil]
[akpm@linux-foundation.org: Documentation/vm/transhuge.txt too]
[sfr@canb.auug.org.au: sync ethernet driver changes]
Signed-off-by: Joonsoo Kim <iamjoonsoo.kim@lge.com>
Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>
Cc: Vlastimil Babka <vbabka@suse.cz>
Cc: Hugh Dickins <hughd@google.com>
Cc: Johannes Berg <johannes@sipsolutions.net>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Sunil Goutham <sgoutham@cavium.com>
Cc: Chris Metcalf <cmetcalf@mellanox.com>
Cc: Manish Chopra <manish.chopra@qlogic.com>
Cc: Yuval Mintz <yuval.mintz@qlogic.com>
Cc: Tariq Toukan <tariqt@mellanox.com>
Cc: Saeed Mahameed <saeedm@mellanox.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'arch/tile')
| -rw-r--r-- | arch/tile/mm/init.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/tile/mm/init.c b/arch/tile/mm/init.c index a0582b7f41d3..adce25462b0d 100644 --- a/arch/tile/mm/init.c +++ b/arch/tile/mm/init.c @@ -679,7 +679,7 @@ static void __init init_free_pfn_range(unsigned long start, unsigned long end) * Hacky direct set to avoid unnecessary * lock take/release for EVERY page here. */ - p->_count.counter = 0; + p->_refcount.counter = 0; p->_mapcount.counter = -1; } init_page_count(page); |