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(parent: e4be260) | patch
parisc: make udelay() SMP-safe
authorHelge Deller <deller@gmx.de>
Wed, 23 Oct 2013 21:29:16 +0000 (23:29 +0200)
committerHelge Deller <deller@gmx.de>
Thu, 7 Nov 2013 21:28:26 +0000 (22:28 +0100)
commitf6d12eefcda2e4135aa529ab8b5bf2766b4a78dd
tree595a3fe90daf8c5a5443745507349dff408af5e1tree | snapshot
parente4be260d156409ebdabf1e13ed547d3703801c5fcommit | diff
parisc: make udelay() SMP-safe

Each CPU has it's own Control Register 16 (CR16) which is used as time source
for the udelay() function. But since the CR16 registers across different CPUs
are not synced, we need to recalculate the loop count if we get switched away
to ensure that we really delay as much time as requested.

Signed-off-by: Helge Deller <deller@gmx.de>
arch/parisc/include/asm/delay.h diff | blob | history
arch/parisc/lib/Makefile diff | blob | history
arch/parisc/lib/delay.c [new file with mode: 0644] blob
Domain: System / Kernel; Licenses: GPL-2.0;