[MIPS] lockdep: Deal with interrupt disable hazard in TRACE_IRQFLAGS

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Between the mtc0 or di instruction that disables interrupts and the
following hazard barrier a processor may still take interrupts.  If an
interrupt is taken after interrupts are disabled but before the state
is updated it will appear to restore_all that it is incorrectly returning
with interrupts disabled.

Signed-off-by: Chris Dearman <chris@mips.com>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

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Chris Dearman 2007-03-26 14:48:50 +01:00 • committed by Ralf Baechle

parent cbde5ebc97

commit fe99f1b184

1 changed files with 31 additions and 0 deletions

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arch/mips/kernel/genex.S

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