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linux/arch/powerpc
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Mark Nelson 36350e0069 powerpc/pseries: Fix kexec regression caused by CPPR tracking 
The code to track the CPPR values added by commit
49bd364713 ("powerpc/pseries: Track previous
CPPR values to correctly EOI interrupts") broke kexec on pseries because
the kexec code in xics.c calls xics_set_cpu_priority() before the IPI has
been EOI'ed. This wasn't a problem previously but it now triggers a BUG_ON
in xics_set_cpu_priority() because os_cppr->index isn't 0.

Fix this problem by setting the index on the CPPR stack to 0 before calling
xics_set_cpu_priority() in xics_teardown_cpu().

Also make it clear that we only want to set the priority when there's just
one CPPR value in the stack, and enforce it by updating the value of
os_cppr->stack[0] rather than os_cppr->stack[os_cppr->index].

While we're at it change the BUG_ON to a WARN_ON.

Reported-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Mark Nelson <markn@au1.ibm.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2010-02-08 15:29:19 +11:00
..
boot zlib: Fix build of powerpc boot wrapper 2010-01-13 16:13:39 -08:00
configs Merge commit 'jwb/merge' into merge 2010-01-29 16:52:27 +11:00
include/asm powerpc: TIF_ABI_PENDING bit removal 2010-02-01 14:00:30 +11:00
kernel powerpc: TIF_ABI_PENDING bit removal 2010-02-01 14:00:30 +11:00
kvm KVM: powerpc: Show timing option only on embedded 2010-01-25 12:26:36 -02:00
lib locking: Convert raw_rwlock to arch_rwlock 2009-12-14 23:55:32 +01:00
math-emu powerpc/math-emu: Fix efp dependence 2009-03-11 06:00:08 -05:00
mm powerpc: Use helpers for rlimits 2010-01-15 13:20:08 +11:00
oprofile tree-wide: fix assorted typos all over the place 2009-12-04 15:39:55 +01:00
platforms powerpc/pseries: Fix kexec regression caused by CPPR tracking 2010-02-08 15:29:19 +11:00
sysdev powerpc/4xx: Add pcix type 1 transactions 2010-01-29 16:51:12 +11:00
xmon powerpc/pseries: Add extended_cede_processor() helper function. 2009-11-24 14:33:03 +11:00
Kconfig Merge branch 'next' of git://git.secretlab.ca/git/linux-2.6 2009-12-16 13:26:53 -08:00
Kconfig.debug Merge branch 'next' of git://git.secretlab.ca/git/linux-2.6 2009-12-16 13:26:53 -08:00
Makefile powerpc: Check for unsupported relocs when using CONFIG_RELOCATABLE 2009-09-24 15:31:40 +10:00
relocs_check.pl powerpc: Check for unsupported relocs when using CONFIG_RELOCATABLE 2009-09-24 15:31:40 +10:00