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| author | Ingo Molnar <mingo@kernel.org> | 2016-07-15 10:38:54 +0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2016-07-15 10:38:54 +0200 |
| commit | 07ccdcd34ac39ddecb8ccd00e5f03d76e9be8881 (patch) | |
| tree | ffd8a0ffd6d803e5fa78c115a83b7dcd3c246d7c /arch/arm64/include/asm/smp.h | |
| parent | 3c8fad9183ab7b3b3471fd2bb3d604104dd447cb (diff) | |
| parent | fa3a9f5744a92c0d7856d4e326c8d920d1d31116 (diff) | |
| download | linux-07ccdcd34ac39ddecb8ccd00e5f03d76e9be8881.tar.bz2 | |
Merge branch 'linus' into x86/apic, to refresh the branch
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'arch/arm64/include/asm/smp.h')
| -rw-r--r-- | arch/arm64/include/asm/smp.h | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/arch/arm64/include/asm/smp.h b/arch/arm64/include/asm/smp.h index 433e50405274..022644704a93 100644 --- a/arch/arm64/include/asm/smp.h +++ b/arch/arm64/include/asm/smp.h @@ -124,6 +124,18 @@ static inline void cpu_panic_kernel(void) cpu_park_loop(); } +/* + * If a secondary CPU enters the kernel but fails to come online, + * (e.g. due to mismatched features), and cannot exit the kernel, + * we increment cpus_stuck_in_kernel and leave the CPU in a + * quiesecent loop within the kernel text. The memory containing + * this loop must not be re-used for anything else as the 'stuck' + * core is executing it. + * + * This function is used to inhibit features like kexec and hibernate. + */ +bool cpus_are_stuck_in_kernel(void); + #endif /* ifndef __ASSEMBLY__ */ #endif /* ifndef __ASM_SMP_H */ |