INIT_SIGHAND: use SIG_DFL instead of NULL

Cosmetic, no changes in the compiled code. Just s/NULL/SIG_DFL/ to make
it more readable and grep-friendly.

Note: probably SIG_IGN makes more sense, we could kill ignore_signals().
But then kernel_init() should do flush_signal_handlers() before exec().

Signed-off-by: Oleg Nesterov <[email protected]>
Cc: Cedric Le Goater <[email protected]>
Cc: Dave Hansen <[email protected]>
Cc: Eric Biederman <[email protected]>
Cc: Herbert Poetzl <[email protected]>
Cc: Mathias Krause <[email protected]>
Acked-by: Roland McGrath <[email protected]>
Acked-by: Serge Hallyn <[email protected]>
Cc: Sukadev Bhattiprolu <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>

diff --git a/include/linux/init_task.h b/include/linux/init_task.h
index 94fecb748a286256fb95a07dc0f588fd1e812b37..2beaa13492beb5dffdb90c0041d942a3785181e1 100644 (file)
--- a/include/linux/init_task.h
+++ b/include/linux/init_task.h
@@ -35,7 +35,7 @@ extern struct nsproxy init_nsproxy;
 
 #define INIT_SIGHAND(sighand) {                                                \
        .count          = ATOMIC_INIT(1),                               \
-       .action         = { { { .sa_handler = NULL, } }, },             \
+       .action         = { { { .sa_handler = SIG_DFL, } }, },          \
        .siglock        = __SPIN_LOCK_UNLOCKED(sighand.siglock),        \
        .signalfd_wqh   = __WAIT_QUEUE_HEAD_INITIALIZER(sighand.signalfd_wqh),  \
 }