[POWERPC] Make soft_enabled irqs preempt safe

Browse source

Rewrite local_get_flags and local_irq_disable to use r13 explicitly,
to avoid the risk that gcc will split get_paca()->soft_enabled into a
sequence unsafe against preemption.  Similar care in local_irq_restore.

Signed-off-by: Hugh Dickins <hugh@veritas.com>
Signed-off-by: Paul Mackerras <paulus@samba.org>

...

This commit is contained in:

Hugh Dickins 2006-11-10 21:32:40 +00:00 • committed by Paul Mackerras

parent 56291e19e3

commit ef2b343e99

2 changed files with 67 additions and 10 deletions

Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL

Download patch file Download diff file Expand all files Collapse all files

57

arch/powerpc/kernel/irq.c

View file

20

include/asm-powerpc/hw_irq.h

View file