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proc: kpagecount/kpageflags code cleanup

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Move increments of pfn/out to bottom of the loop.

Signed-off-by: Wu Fengguang <[email protected]>
Cc: KOSAKI Motohiro <[email protected]>
Cc: Andi Kleen <[email protected]>
Acked-by: Matt Mackall <[email protected]>
Cc: Alexey Dobriyan <[email protected]>
Cc: Ingo Molnar <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
This commit is contained in:
Wu Fengguang 2009-06-16 15:32:23 -07:00 • committed by Linus Torvalds
commit ed7ce0f102
1 changed files with 11 additions and 6 deletions
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17
fs/proc/page.c
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@ -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;
}