timer: Convert schedule_timeout() to use from_timer()

In preparation for unconditionally passing the struct timer_list pointer to
all timer callbacks, switch to using the new from_timer() helper and passing
the timer pointer explicitly. Since this special timer is on the stack, it
needs to have a wrapper structure to carry state once .data is eliminated.

Signed-off-by: Kees Cook <[email protected]>
Signed-off-by: Thomas Gleixner <[email protected]>
Cc: [email protected]
Cc: Petr Mladek <[email protected]>
Cc: Benjamin Herrenschmidt <[email protected]>
Cc: Lai Jiangshan <[email protected]>
Cc: Sebastian Reichel <[email protected]>
Cc: Kalle Valo <[email protected]>
Cc: Paul Mackerras <[email protected]>
Cc: Pavel Machek <[email protected]>
Cc: [email protected]
Cc: Chris Metcalf <[email protected]>
Cc: [email protected]
Cc: [email protected]
Cc: "James E.J. Bottomley" <[email protected]>
Cc: Wim Van Sebroeck <[email protected]>
Cc: Michael Ellerman <[email protected]>
Cc: Ursula Braun <[email protected]>
Cc: Geert Uytterhoeven <[email protected]>
Cc: Viresh Kumar <[email protected]>
Cc: Harish Patil <[email protected]>
Cc: Guenter Roeck <[email protected]>
Cc: Manish Chopra <[email protected]>
Cc: Len Brown <[email protected]>
Cc: Arnd Bergmann <[email protected]>
Cc: [email protected]
Cc: Heiko Carstens <[email protected]>
Cc: Tejun Heo <[email protected]>
Cc: Julian Wiedmann <[email protected]>
Cc: John Stultz <[email protected]>
Cc: Mark Gross <[email protected]>
Cc: "Rafael J. Wysocki" <[email protected]>
Cc: [email protected]
Cc: [email protected]
Cc: "Martin K. Petersen" <[email protected]>
Cc: Greg Kroah-Hartman <[email protected]>
Cc: Stephen Boyd <[email protected]>
Cc: Oleg Nesterov <[email protected]>
Cc: Ralf Baechle <[email protected]>
Cc: Stefan Richter <[email protected]>
Cc: Michael Reed <[email protected]>
Cc: [email protected]
Cc: Martin Schwidefsky <[email protected]>
Cc: Andrew Morton <[email protected]>
Cc: [email protected]
Cc: Sudip Mukherjee <[email protected]>
Link: https://lkml.kernel.org/r/[email protected]

1 files changed, 8 insertions, 0 deletions

diff --git a/include/linux/timer.h b/include/linux/timer.h
index 6383c528b148..5ef5c9e41a09 100644
--- a/include/linux/timer.h
+++ b/include/linux/timer.h
@@ -179,6 +179,14 @@ static inline void timer_setup(struct timer_list *timer,
 		      (TIMER_DATA_TYPE)timer, flags);
 }
 
+static inline void timer_setup_on_stack(struct timer_list *timer,
+			       void (*callback)(struct timer_list *),
+			       unsigned int flags)
+{
+	__setup_timer_on_stack(timer, (TIMER_FUNC_TYPE)callback,
+			       (TIMER_DATA_TYPE)timer, flags);
+}
+
 #define from_timer(var, callback_timer, timer_fieldname) \
 	container_of(callback_timer, typeof(*var), timer_fieldname)