Paul E. McKenney 1e474b28e7 smp/up: Make smp_call_function_single() match SMP semantics
In CONFIG_SMP=y kernels, smp_call_function_single() returns -ENXIO when
invoked for a non-existent CPU.  In contrast, in CONFIG_SMP=n kernels,
a splat is emitted and smp_call_function_single() otherwise silently
ignores its "cpu" argument, instead pretending that the caller intended
to have something happen on CPU 0.  Given that there is now code that
expects smp_call_function_single() to return an error if a bad CPU was
specified, this difference in semantics needs to be addressed.

Bring the semantics of the CONFIG_SMP=n version of
smp_call_function_single() into alignment with its CONFIG_SMP=y
counterpart.

Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Link: https://lkml.kernel.org/r/20200205143409.GA7021@paulmck-ThinkPad-P72
2020-02-07 15:34:12 +01:00
..
2019-09-15 21:37:13 +02:00
2020-01-24 20:08:51 +01:00
2019-11-27 11:42:01 -08:00
2019-07-08 18:55:42 -07:00
2019-07-08 18:55:42 -07:00
2020-01-03 11:17:14 -08:00
2020-01-09 13:23:40 +01:00
2019-12-04 19:44:14 -08:00
2020-01-08 16:32:55 +00:00
2019-05-24 20:16:01 +02:00
2019-09-20 11:19:48 -07:00
2019-12-02 17:35:04 -08:00
2019-12-11 12:22:38 -08:00
2020-01-14 12:20:48 +01:00
2019-12-04 15:18:39 +01:00
2019-07-08 19:36:47 -07:00
2019-07-08 19:36:47 -07:00