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authorDipankar Sarma <dipankar@in.ibm.com>2005-09-16 19:28:13 -0700
committerLinus Torvalds <torvalds@g5.osdl.org>2005-09-17 11:50:02 -0700
commit4fb3a53860cee2aaaf81186c451b7da0b95b45c1 (patch)
treedb66ba7d3886644729707586aed781c445e12c16 /fs/proc
parentaf4e5a218e18ad588d60a4f9d6f8fb5db1a32587 (diff)
downloadop-kernel-dev-4fb3a53860cee2aaaf81186c451b7da0b95b45c1.zip
op-kernel-dev-4fb3a53860cee2aaaf81186c451b7da0b95b45c1.tar.gz
[PATCH] files: fix preemption issues
With the new fdtable locking rules, you have to protect fdtable with either ->file_lock or rcu_read_lock/unlock(). There are some places where we aren't doing either. This patch fixes those places. Signed-off-by: Dipankar Sarma <dipankar@in.ibm.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'fs/proc')
-rw-r--r--fs/proc/array.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/fs/proc/array.c b/fs/proc/array.c
index d88d518..d84eeca 100644
--- a/fs/proc/array.c
+++ b/fs/proc/array.c
@@ -74,6 +74,7 @@
#include <linux/file.h>
#include <linux/times.h>
#include <linux/cpuset.h>
+#include <linux/rcupdate.h>
#include <asm/uaccess.h>
#include <asm/pgtable.h>
@@ -180,12 +181,14 @@ static inline char * task_state(struct task_struct *p, char *buffer)
p->gid, p->egid, p->sgid, p->fsgid);
read_unlock(&tasklist_lock);
task_lock(p);
+ rcu_read_lock();
if (p->files)
fdt = files_fdtable(p->files);
buffer += sprintf(buffer,
"FDSize:\t%d\n"
"Groups:\t",
fdt ? fdt->max_fds : 0);
+ rcu_read_unlock();
group_info = p->group_info;
get_group_info(group_info);
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