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| author | Jens Axboe <axboe@kernel.dk> | 2020-07-08 08:02:13 -0600 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2020-07-08 08:02:13 -0600 |
| commit | 482c6b614a4750f71ed9c928bb5b2007a05dd694 (patch) | |
| tree | 60f9140b0c24fb4b2b1059afcce8ac77ecc3d3c1 /arch/x86/include/asm/cpumask.h | |
| parent | 0e6e255e7a58cdf4ee4163f83deeb5ce4946051e (diff) | |
| parent | dcb7fd82c75ee2d6e6f9d8cc71c52519ed52e258 (diff) | |
Merge tag 'v5.8-rc4' into for-5.9/drivers
Merge in 5.8-rc4 for-5.9/block to setup for-5.9/drivers, to provide
a clean base and making the life for the NVMe changes easier.
Signed-off-by: Jens Axboe <axboe@kernel.dk>
* tag 'v5.8-rc4': (732 commits)
Linux 5.8-rc4
x86/ldt: use "pr_info_once()" instead of open-coding it badly
MIPS: Do not use smp_processor_id() in preemptible code
MIPS: Add missing EHB in mtc0 -> mfc0 sequence for DSPen
.gitignore: Do not track `defconfig` from `make savedefconfig`
io_uring: fix regression with always ignoring signals in io_cqring_wait()
x86/ldt: Disable 16-bit segments on Xen PV
x86/entry/32: Fix #MC and #DB wiring on x86_32
x86/entry/xen: Route #DB correctly on Xen PV
x86/entry, selftests: Further improve user entry sanity checks
x86/entry/compat: Clear RAX high bits on Xen PV SYSENTER
i2c: mlxcpld: check correct size of maximum RECV_LEN packet
i2c: add Kconfig help text for slave mode
i2c: slave-eeprom: update documentation
i2c: eg20t: Load module automatically if ID matches
i2c: designware: platdrv: Set class based on DMI
i2c: algo-pca: Add 0x78 as SCL stuck low status for PCA9665
mm/page_alloc: fix documentation error
vmalloc: fix the owner argument for the new __vmalloc_node_range callers
mm/cma.c: use exact_nid true to fix possible per-numa cma leak
...
Diffstat (limited to 'arch/x86/include/asm/cpumask.h')
| -rw-r--r-- | arch/x86/include/asm/cpumask.h | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/arch/x86/include/asm/cpumask.h b/arch/x86/include/asm/cpumask.h index 6722ffcef2e6..3afa990d756b 100644 --- a/arch/x86/include/asm/cpumask.h +++ b/arch/x86/include/asm/cpumask.h @@ -11,5 +11,23 @@ extern cpumask_var_t cpu_sibling_setup_mask; extern void setup_cpu_local_masks(void); +/* + * NMI and MCE exceptions need cpu_is_offline() _really_ early, + * provide an arch_ special for them to avoid instrumentation. + */ +#if NR_CPUS > 1 +static __always_inline bool arch_cpu_online(int cpu) +{ + return arch_test_bit(cpu, cpumask_bits(cpu_online_mask)); +} +#else +static __always_inline bool arch_cpu_online(int cpu) +{ + return cpu == 0; +} +#endif + +#define arch_cpu_is_offline(cpu) unlikely(!arch_cpu_online(cpu)) + #endif /* __ASSEMBLY__ */ #endif /* _ASM_X86_CPUMASK_H */ |