Commit 33656275 authored by Matteo Croce's avatar Matteo Croce Committed by Daniel Borkmann
Browse files

bpf: Update bpf_get_smp_processor_id() documentation 



BPF programs run with migration disabled regardless of preemption, as
they are protected by migrate_disable(). Update the uapi documentation
accordingly.

Signed-off-by: default avatarMatteo Croce <mcroce@microsoft.com>
Signed-off-by: default avatarDaniel Borkmann <daniel@iogearbox.net>
Acked-by: default avatarYonghong Song <yhs@fb.com>
Link: https://lore.kernel.org/bpf/20210914235400.59427-1-mcroce@linux.microsoft.com
parent 69cd8239

include/uapi/linux/bpf.h

+1 −1
Original line number Diff line number Diff line
@@ -1629,7 +1629,7 @@ union bpf_attr { 
 * u32 bpf_get_smp_processor_id(void)

 * 	Description

 * 		Get the SMP (symmetric multiprocessing) processor id. Note that

 * 		all programs run with preemption disabled, which means that the

 * 		all programs run with migration disabled, which means that the

 * 		SMP processor id is stable during all the execution of the

 * 		program.

 * 	Return

tools/include/uapi/linux/bpf.h

+1 −1
Original line number Diff line number Diff line
@@ -1629,7 +1629,7 @@ union bpf_attr { 
 * u32 bpf_get_smp_processor_id(void)

 * 	Description

 * 		Get the SMP (symmetric multiprocessing) processor id. Note that

 * 		all programs run with preemption disabled, which means that the

 * 		all programs run with migration disabled, which means that the

 * 		SMP processor id is stable during all the execution of the

 * 		program.

 * 	Return