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arch/um/drivers/line.c: safely iterate over list of winch handlers

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unregister_winch() should use list_for_each_safe(), as it can delete from
the list.

Signed-off-by: Will Newton <[email protected]>
Cc: richard -rw- weinberger <[email protected]>
Acked-by: WANG Cong <[email protected]>
Cc: Jeff Dike <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
This commit is contained in:
Will Newton 2011-01-12 16:59:26 -08:00 • committed by Linus Torvalds
commit 48a0b7404d
1 changed files with 2 additions and 2 deletions
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4
arch/um/drivers/line.c
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@ -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);