diff options
| author | Stephen Warren <swarren@nvidia.com> | 2013-08-02 20:52:49 +0100 |
|---|---|---|
| committer | Russell King <rmk+kernel@arm.linux.org.uk> | 2013-08-13 20:23:18 +0100 |
| commit | 2103f6cba61a8b8bea3fc1b63661d830a2125e76 (patch) | |
| tree | ecc5f6e4df5631932b38e9eb1d8dd7cd8251ed2b /arch/arm/include/asm/smp_plat.h | |
| parent | 00efaa0250939dc148e2d3104fb3c18395d24a2d (diff) | |
ARM: 7807/1: kexec: validate CPU hotplug support
Architectures should fully validate whether kexec is possible as part of
machine_kexec_prepare(), so that user-space's kexec_load() operation can
report any problems. Performing validation in machine_kexec() itself is
too late, since it is not allowed to return.
Prior to this patch, ARM's machine_kexec() was testing after-the-fact
whether machine_kexec_prepare() was able to disable all but one CPU.
Instead, modify machine_kexec_prepare() to validate all conditions
necessary for machine_kexec_prepare()'s to succeed. BUG if the validation
succeeded, yet disabling the CPUs didn't actually work.
Signed-off-by: Stephen Warren <swarren@nvidia.com>
Acked-by: "Eric W. Biederman" <ebiederm@xmission.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Diffstat (limited to 'arch/arm/include/asm/smp_plat.h')
| -rw-r--r-- | arch/arm/include/asm/smp_plat.h | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/arch/arm/include/asm/smp_plat.h b/arch/arm/include/asm/smp_plat.h index 6462a721ebd4..a252c0bfacf5 100644 --- a/arch/arm/include/asm/smp_plat.h +++ b/arch/arm/include/asm/smp_plat.h @@ -88,4 +88,7 @@ static inline u32 mpidr_hash_size(void) { return 1 << mpidr_hash.bits; } + +extern int platform_can_cpu_hotplug(void); + #endif |