iv/linux
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

[PATCH] Use struct pspace in next_pidmap and find_ge_pid

Browse Source 
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: Eric W. Biederman <ebiederm@xmission.com>
Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Eric W. Biederman
2006-10-02 02:17:25 -07:00
committed by Linus Torvalds
parent 3fbc964864
commit f40f50d3bb
1 changed files with 7 additions and 6 deletions
Download Patch File Download Diff File Expand all files Collapse all files

13
kernel/pid.c
View File

@@ -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;