Commit f40f50d3 authored by Eric W. Biederman's avatar Eric W. Biederman Committed by Linus Torvalds
Browse files

[PATCH] Use struct pspace in next_pidmap and find_ge_pid



This updates my proc: readdir race fix (take 3) patch
to account for the changes made by: Sukadev Bhattiprolu <sukadev@us.ibm.com>
to introduce struct pspace.
Signed-off-by: default avatarEric W. Biederman <ebiederm@xmission.com>
Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Signed-off-by: default avatarAndrew Morton <akpm@osdl.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@osdl.org>
parent 3fbc9648
......@@ -149,19 +149,20 @@ static int alloc_pidmap(struct pspace *pspace)
return -1;
}
static int next_pidmap(int last)
static int next_pidmap(struct pspace *pspace, int last)
{
int offset;
struct pidmap *map;
struct pidmap *map, *end;
offset = (last + 1) & BITS_PER_PAGE_MASK;
map = &pidmap_array[(last + 1)/BITS_PER_PAGE];
for (; map < &pidmap_array[PIDMAP_ENTRIES]; map++, offset = 0) {
map = &pspace->pidmap[(last + 1)/BITS_PER_PAGE];
end = &pspace->pidmap[PIDMAP_ENTRIES];
for (; map < end; map++, offset = 0) {
if (unlikely(!map->page))
continue;
offset = find_next_bit((map)->page, BITS_PER_PAGE, offset);
if (offset < BITS_PER_PAGE)
return mk_pid(map, offset);
return mk_pid(pspace, map, offset);
}
return -1;
}
......@@ -338,7 +339,7 @@ struct pid *find_ge_pid(int nr)
pid = find_pid(nr);
if (pid)
break;
nr = next_pidmap(nr);
nr = next_pidmap(&init_pspace, nr);
} while (nr > 0);
return pid;
......
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