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| author | Wu Fengguang <fengguang.wu@intel.com> | 2009-06-16 15:32:23 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2009-06-16 19:47:36 -0700 |
| commit | ed7ce0f1022942301776f93159c981b09382ddea (patch) | |
| tree | d81e98a13f6a10e6c258aa0f2bec990da40c5ac2 /fs | |
| parent | 20a0307c0396c2edb651401d2f2db193dda2f3c9 (diff) | |
| download | lwn-ed7ce0f1022942301776f93159c981b09382ddea.tar.gz lwn-ed7ce0f1022942301776f93159c981b09382ddea.zip | |
proc: kpagecount/kpageflags code cleanup
Move increments of pfn/out to bottom of the loop.
Signed-off-by: Wu Fengguang <fengguang.wu@intel.com>
Cc: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Cc: Andi Kleen <andi@firstfloor.org>
Acked-by: Matt Mackall <mpm@selenic.com>
Cc: Alexey Dobriyan <adobriyan@gmail.com>
Cc: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'fs')
| -rw-r--r-- | fs/proc/page.c | 17 |
1 files changed, 11 insertions, 6 deletions
diff --git a/fs/proc/page.c b/fs/proc/page.c index 38dd88b7ce84..e73e911b7d0c 100644 --- a/fs/proc/page.c +++ b/fs/proc/page.c @@ -12,6 +12,7 @@ #define KPMSIZE sizeof(u64) #define KPMMASK (KPMSIZE - 1) + /* /proc/kpagecount - an array exposing page counts * * Each entry is a u64 representing the corresponding @@ -33,20 +34,22 @@ static ssize_t kpagecount_read(struct file *file, char __user *buf, return -EINVAL; while (count > 0) { - ppage = NULL; if (pfn_valid(pfn)) ppage = pfn_to_page(pfn); - pfn++; + else + ppage = NULL; if (!ppage) pcount = 0; else pcount = page_mapcount(ppage); - if (put_user(pcount, out++)) { + if (put_user(pcount, out)) { ret = -EFAULT; break; } + pfn++; + out++; count -= KPMSIZE; } @@ -99,10 +102,10 @@ static ssize_t kpageflags_read(struct file *file, char __user *buf, return -EINVAL; while (count > 0) { - ppage = NULL; if (pfn_valid(pfn)) ppage = pfn_to_page(pfn); - pfn++; + else + ppage = NULL; if (!ppage) kflags = 0; else @@ -120,11 +123,13 @@ static ssize_t kpageflags_read(struct file *file, char __user *buf, kpf_copy_bit(kflags, KPF_RECLAIM, PG_reclaim) | kpf_copy_bit(kflags, KPF_BUDDY, PG_buddy); - if (put_user(uflags, out++)) { + if (put_user(uflags, out)) { ret = -EFAULT; break; } + pfn++; + out++; count -= KPMSIZE; } |