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ARM: Flush the caches for non panicking CPUs in case of a kernel panic

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In case of a kernel panic, only the panicking CPU does an entire
cache flush. This means that certain dirty cache lines in the L1
caches of the other CPUs may never get flushed. This gives us
improper RAM dumps. Add cache flushing for all the online CPUs.
The outer domain is not flushed since it is already being done by
the panicking CPU.

Change-Id: Ibf844ecf6b4dbc3c623789f72a26936aeb4a7306
Signed-off-by: Syed Rameez Mustafa <rameezmustafa@codeaurora.org>
This commit is contained in:
Syed Rameez Mustafa 2013-06-11 22:36:08 -07:00 committed by Stephen Boyd
parent 51e9fb42c9
commit ec6b7a0cf6
1 changed files with 2 additions and 0 deletions
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2
arch/arm/kernel/smp.c
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@ -584,6 +584,8 @@ static void ipi_cpu_stop(unsigned int cpu)
local_fiq_disable();
local_irq_disable();
flush_cache_all();
while (1)
cpu_relax();
}