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authorWill Newton <will.newton@gmail.com>2011-01-12 16:59:26 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2011-01-13 08:03:07 -0800
commit48a0b7404db9b83799e97a7d599fceb8df66bf59 (patch)
tree4350bfd2c1336aa36f16264c13874b36948615f0 /arch/um
parent94295e2305b4f4bf538dbdf9870fe04777320b75 (diff)
arch/um/drivers/line.c: safely iterate over list of winch handlers
unregister_winch() should use list_for_each_safe(), as it can delete from the list. Signed-off-by: Will Newton <will.newton@gmail.com> Cc: richard -rw- weinberger <richard.weinberger@gmail.com> Acked-by: WANG Cong <xiyou.wangcong@gmail.com> Cc: Jeff Dike <jdike@addtoit.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'arch/um')
-rw-r--r--arch/um/drivers/line.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/arch/um/drivers/line.c b/arch/um/drivers/line.c
index 1664cce7b0a..050e4ddbbb6 100644
--- a/arch/um/drivers/line.c
+++ b/arch/um/drivers/line.c
@@ -821,12 +821,12 @@ void register_winch_irq(int fd, int tty_fd, int pid, struct tty_struct *tty,
static void unregister_winch(struct tty_struct *tty)
{
- struct list_head *ele;
+ struct list_head *ele, *next;
struct winch *winch;
spin_lock(&winch_handler_lock);
- list_for_each(ele, &winch_handlers) {
+ list_for_each_safe(ele, next, &winch_handlers) {
winch = list_entry(ele, struct winch, list);
if (winch->tty == tty) {
free_winch(winch, 1);