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| author | Brian Gerst <brgerst@gmail.com> | 2009-01-18 18:38:58 +0300 |
|---|---|---|
| committer | Tejun Heo <tj@kernel.org> | 2009-01-18 18:38:58 +0300 |
| commit | 92d65b2371d86d40807e1dbfdccadc4d501edcde (patch) | |
| tree | 9e99e891fc3ecd6f24073a221cd3b7683e0fb022 /arch/x86/kernel/cpu/common.c | |
| parent | 26f80bd6a9ab17bc8a60b6092e7c0d05c5927ce5 (diff) | |
| download | linux-92d65b2371d86d40807e1dbfdccadc4d501edcde.tar.xz | |
x86-64: Convert exception stacks to per-cpu
Move the exception stacks to per-cpu, removing specific allocation code.
Signed-off-by: Brian Gerst <brgerst@gmail.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
Diffstat (limited to 'arch/x86/kernel/cpu/common.c')
| -rw-r--r-- | arch/x86/kernel/cpu/common.c | 23 |
1 files changed, 8 insertions, 15 deletions
diff --git a/arch/x86/kernel/cpu/common.c b/arch/x86/kernel/cpu/common.c index 496f0a01919b..b6d7eec0be77 100644 --- a/arch/x86/kernel/cpu/common.c +++ b/arch/x86/kernel/cpu/common.c @@ -913,8 +913,9 @@ void __cpuinit pda_init(int cpu) } } -static char boot_exception_stacks[(N_EXCEPTION_STACKS - 1) * EXCEPTION_STKSZ + - DEBUG_STKSZ] __page_aligned_bss; +static DEFINE_PER_CPU_PAGE_ALIGNED(char, exception_stacks + [(N_EXCEPTION_STACKS - 1) * EXCEPTION_STKSZ + DEBUG_STKSZ]) + __aligned(PAGE_SIZE); extern asmlinkage void ignore_sysret(void); @@ -972,15 +973,12 @@ void __cpuinit cpu_init(void) struct tss_struct *t = &per_cpu(init_tss, cpu); struct orig_ist *orig_ist = &per_cpu(orig_ist, cpu); unsigned long v; - char *estacks = NULL; struct task_struct *me; int i; /* CPU 0 is initialised in head64.c */ if (cpu != 0) pda_init(cpu); - else - estacks = boot_exception_stacks; me = current; @@ -1014,18 +1012,13 @@ void __cpuinit cpu_init(void) * set up and load the per-CPU TSS */ if (!orig_ist->ist[0]) { - static const unsigned int order[N_EXCEPTION_STACKS] = { - [0 ... N_EXCEPTION_STACKS - 1] = EXCEPTION_STACK_ORDER, - [DEBUG_STACK - 1] = DEBUG_STACK_ORDER + static const unsigned int sizes[N_EXCEPTION_STACKS] = { + [0 ... N_EXCEPTION_STACKS - 1] = EXCEPTION_STKSZ, + [DEBUG_STACK - 1] = DEBUG_STKSZ }; + char *estacks = per_cpu(exception_stacks, cpu); for (v = 0; v < N_EXCEPTION_STACKS; v++) { - if (cpu) { - estacks = (char *)__get_free_pages(GFP_ATOMIC, order[v]); - if (!estacks) - panic("Cannot allocate exception " - "stack %ld %d\n", v, cpu); - } - estacks += PAGE_SIZE << order[v]; + estacks += sizes[v]; orig_ist->ist[v] = t->x86_tss.ist[v] = (unsigned long)estacks; } |