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authorWu Fengguang <fengguang.wu@intel.com>2009-06-17 02:32:23 +0400
committerLinus Torvalds <torvalds@linux-foundation.org>2009-06-17 06:47:36 +0400
commited7ce0f1022942301776f93159c981b09382ddea (patch)
treed81e98a13f6a10e6c258aa0f2bec990da40c5ac2 /fs/proc
parent20a0307c0396c2edb651401d2f2db193dda2f3c9 (diff)
downloadlinux-ed7ce0f1022942301776f93159c981b09382ddea.tar.xz
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/proc')
-rw-r--r--fs/proc/page.c17
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;
}