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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 | 26f80bd6a9ab17bc8a60b6092e7c0d05c5927ce5 (patch) | |
| tree | 7456ba479397c986337b2bb9574a74710fddbdee /arch/x86/include | |
| parent | 9eb912d1aa6b8106e06a73ea6702ec3dab0d6a1a (diff) | |
| download | linux-26f80bd6a9ab17bc8a60b6092e7c0d05c5927ce5.tar.xz | |
x86-64: Convert irqstacks to per-cpu
Move the irqstackptr variable from the PDA to per-cpu. Make the
stacks themselves per-cpu, removing some specific allocation code.
Add a seperate flag (is_boot_cpu) to simplify the per-cpu boot
adjustments.
tj: * sprinkle some underbars around.
* irq_stack_ptr is not used till traps_init(), no reason to
initialize it early. On SMP, just leaving it NULL till proper
initialization in setup_per_cpu_areas() works. Dropped
is_boot_cpu and early irq_stack_ptr initialization.
* do DECLARE/DEFINE_PER_CPU(char[IRQ_STACK_SIZE], irq_stack)
instead of (char, irq_stack[IRQ_STACK_SIZE]).
Signed-off-by: Brian Gerst <brgerst@gmail.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
Diffstat (limited to 'arch/x86/include')
| -rw-r--r-- | arch/x86/include/asm/page_64.h | 4 | ||||
| -rw-r--r-- | arch/x86/include/asm/pda.h | 1 | ||||
| -rw-r--r-- | arch/x86/include/asm/processor.h | 3 |
3 files changed, 5 insertions, 3 deletions
diff --git a/arch/x86/include/asm/page_64.h b/arch/x86/include/asm/page_64.h index 5ebca29f44f0..e27fdbe5f9e4 100644 --- a/arch/x86/include/asm/page_64.h +++ b/arch/x86/include/asm/page_64.h @@ -13,8 +13,8 @@ #define DEBUG_STACK_ORDER (EXCEPTION_STACK_ORDER + 1) #define DEBUG_STKSZ (PAGE_SIZE << DEBUG_STACK_ORDER) -#define IRQSTACK_ORDER 2 -#define IRQSTACKSIZE (PAGE_SIZE << IRQSTACK_ORDER) +#define IRQ_STACK_ORDER 2 +#define IRQ_STACK_SIZE (PAGE_SIZE << IRQ_STACK_ORDER) #define STACKFAULT_STACK 1 #define DOUBLEFAULT_STACK 2 diff --git a/arch/x86/include/asm/pda.h b/arch/x86/include/asm/pda.h index 8ee835ed10e1..09965f7a2165 100644 --- a/arch/x86/include/asm/pda.h +++ b/arch/x86/include/asm/pda.h @@ -22,7 +22,6 @@ struct x8664_pda { /* gcc-ABI: this canary MUST be at offset 40!!! */ #endif - char *irqstackptr; short nodenumber; /* number of current node (32k max) */ short in_bootmem; /* pda lives in bootmem */ short isidle; diff --git a/arch/x86/include/asm/processor.h b/arch/x86/include/asm/processor.h index 091cd8855f2e..f511246fa6cd 100644 --- a/arch/x86/include/asm/processor.h +++ b/arch/x86/include/asm/processor.h @@ -378,6 +378,9 @@ union thread_xstate { #ifdef CONFIG_X86_64 DECLARE_PER_CPU(struct orig_ist, orig_ist); + +DECLARE_PER_CPU(char[IRQ_STACK_SIZE], irq_stack); +DECLARE_PER_CPU(char *, irq_stack_ptr); #endif extern void print_cpu_info(struct cpuinfo_x86 *); |