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| author |   Mark Rutland <mark.rutland@arm.com> | 2015-03-13 16:14:34 +0000 |
|---|---|---|
| committer |   Will Deacon <will.deacon@arm.com> | 2015-03-17 16:58:24 +0000 |
| commit | 137650aad96c9594683445e41afa8ac5a2097520 (patch) | |
| tree | 3faff891a324ef948471492d3cda2e8ca7ecbcca /arch/arm64/Kconfig | |
| parent | arm64: Implement cpu_relax as yield (diff) | |
| download | linux-dev-137650aad96c9594683445e41afa8ac5a2097520.tar.xz linux-dev-137650aad96c9594683445e41afa8ac5a2097520.zip | |
arm64: apply alternatives for !SMP kernels
Currently we only perform alternative patching for kernels built with
CONFIG_SMP, as we call apply_alternatives_all() in smp.c, which is only
built for CONFIG_SMP. Thus !SMP kernels may not have necessary
alternatives patched in.
This patch ensures that we call apply_alternatives_all() once all CPUs
are booted, even for !SMP kernels, by having the smp_init_cpus() stub
call this for !SMP kernels via up_late_init. A new wrapper,
do_post_cpus_up_work, is added so we can hook other calls here later
(e.g. boot mode logging).
Cc: Andre Przywara <andre.przywara@arm.com>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Fixes: e039ee4ee3fcf174 ("arm64: add alternative runtime patching")
Tested-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Reviewed-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Signed-off-by: Mark Rutland <mark.rutland@arm.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
Diffstat (limited to 'arch/arm64/Kconfig')
| -rw-r--r-- | arch/arm64/Kconfig | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig index 1b8e97331ffb..0d46debbc9a7 100644 --- a/arch/arm64/Kconfig +++ b/arch/arm64/Kconfig @@ -470,6 +470,10 @@ config HOTPLUG_CPU source kernel/Kconfig.preempt +config UP_LATE_INIT + def_bool y + depends on !SMP + config HZ int default 100 |