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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
arch/ia64/kernel/perfmon.c
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@@ -2218,12 +2218,13 @@ static void
pfm_free_fd(int fd, struct file *file)
{
struct files_struct *files = current->files;
struct fdtable *fdt = files_fdtable(files);
struct fdtable *fdt;
/*
* there ie no fd_uninstall(), so we do it here
*/
spin_lock(&files->file_lock);
fdt = files_fdtable(files);
rcu_assign_pointer(fdt->fd[fd], NULL);
spin_unlock(&files->file_lock);