staging: lustre: disable preempt while sampling processor id.

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[ Upstream commit dbeccabf52 ]

Calling smp_processor_id() without disabling preemption
triggers a warning (if CONFIG_DEBUG_PREEMPT).
I think the result of cfs_cpt_current() is only used as a hint for
load balancing, rather than as a precise and stable indicator of
the current CPU.  So it doesn't need to be called with
preemption disabled.

So disable preemption inside cfs_cpt_current() to silence the warning.

Signed-off-by: NeilBrown <neilb@suse.com>
Reviewed-by: Andreas Dilger <andreas.dilger@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

...

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NeilBrown 2017-12-19 10:01:47 +11:00 • committed by Greg Kroah-Hartman

parent 01ff15fcf4

commit 89deb4ad01

1 changed files with 7 additions and 6 deletions

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drivers/staging/lustre/lnet/libcfs/linux/linux-cpu.c

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