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[PATCH] files: fix preemption issues

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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>
This commit is contained in:
Dipankar Sarma 2005-09-16 19:28:13 -07:00 • committed by Linus Torvalds
parent af4e5a218e
commit 4fb3a53860
5 changed files with 20 additions and 2 deletions
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3
fs/proc/array.c
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@ -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);