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x86: Use common threadinfo allocator 

The only difference is the free_thread_info function, which frees
xstate.

Use the new arch_release_task_struct() function instead and switch
over to the core allocator.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Link: http://lkml.kernel.org/r/20120505150141.559556763@linutronix.de
Cc: x86@kernel.org
This commit is contained in:
Thomas Gleixner 2012-05-05 15:05:42 +00:00
parent 7b8fe0570a
commit 38e7c572ce
6 changed files with 12 additions and 31 deletions
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2
arch/x86/include/asm/boot.h
View File

@ -19,7 +19,7 @@
#ifdef CONFIG_X86_64
#define MIN_KERNEL_ALIGN_LG2 PMD_SHIFT
#else
#define MIN_KERNEL_ALIGN_LG2 (PAGE_SHIFT + THREAD_ORDER)
#define MIN_KERNEL_ALIGN_LG2 (PAGE_SHIFT + THREAD_SIZE_ORDER)
#endif
#define MIN_KERNEL_ALIGN (_AC(1, UL) << MIN_KERNEL_ALIGN_LG2)

4
arch/x86/include/asm/page_32_types.h
View File

@ -15,8 +15,8 @@
*/
#define __PAGE_OFFSET _AC(CONFIG_PAGE_OFFSET, UL)
#define THREAD_ORDER 1
#define THREAD_SIZE (PAGE_SIZE << THREAD_ORDER)
#define THREAD_SIZE_ORDER 1
#define THREAD_SIZE (PAGE_SIZE << THREAD_SIZE_ORDER)
#define STACKFAULT_STACK 0
#define DOUBLEFAULT_STACK 1

4
arch/x86/include/asm/page_64_types.h
View File

@ -1,8 +1,8 @@
#ifndef _ASM_X86_PAGE_64_DEFS_H
#define _ASM_X86_PAGE_64_DEFS_H
#define THREAD_ORDER 1
#define THREAD_SIZE (PAGE_SIZE << THREAD_ORDER)
#define THREAD_SIZE_ORDER 1
#define THREAD_SIZE (PAGE_SIZE << THREAD_SIZE_ORDER)
#define CURRENT_MASK (~(THREAD_SIZE - 1))
#define EXCEPTION_STACK_ORDER 0

20
arch/x86/include/asm/thread_info.h
View File

@ -155,24 +155,6 @@ struct thread_info {
#define PREEMPT_ACTIVE 0x10000000
/* thread information allocation */
#ifdef CONFIG_DEBUG_STACK_USAGE
#define THREAD_FLAGS (GFP_KERNEL | __GFP_NOTRACK | __GFP_ZERO)
#else
#define THREAD_FLAGS (GFP_KERNEL | __GFP_NOTRACK)
#endif
#define __HAVE_ARCH_THREAD_INFO_ALLOCATOR
#define alloc_thread_info_node(tsk, node) \
({ \
struct page *page = alloc_pages_node(node, THREAD_FLAGS, \
THREAD_ORDER); \
struct thread_info *ret = page ? page_address(page) : NULL; \
\
ret; \
})
#ifdef CONFIG_X86_32
#define STACK_WARN (THREAD_SIZE/8)
@ -282,7 +264,7 @@ static inline bool is_ia32_task(void)
#ifndef __ASSEMBLY__
extern void arch_task_cache_init(void);
extern void free_thread_info(struct thread_info *ti);
extern int arch_dup_task_struct(struct task_struct *dst, struct task_struct *src);
extern void arch_release_task_struct(struct task_struct *tsk);
#endif
#endif /* _ASM_X86_THREAD_INFO_H */

8
arch/x86/kernel/irq_32.c
View File

@ -127,8 +127,8 @@ void __cpuinit irq_ctx_init(int cpu)
return;
irqctx = page_address(alloc_pages_node(cpu_to_node(cpu),
THREAD_FLAGS,
THREAD_ORDER));
THREADINFO_GFP,
THREAD_SIZE_ORDER));
memset(&irqctx->tinfo, 0, sizeof(struct thread_info));
irqctx->tinfo.cpu = cpu;
irqctx->tinfo.preempt_count = HARDIRQ_OFFSET;
@ -137,8 +137,8 @@ void __cpuinit irq_ctx_init(int cpu)
per_cpu(hardirq_ctx, cpu) = irqctx;
irqctx = page_address(alloc_pages_node(cpu_to_node(cpu),
THREAD_FLAGS,
THREAD_ORDER));
THREADINFO_GFP,
THREAD_SIZE_ORDER));
memset(&irqctx->tinfo, 0, sizeof(struct thread_info));
irqctx->tinfo.cpu = cpu;
irqctx->tinfo.addr_limit = MAKE_MM_SEG(0);

5
arch/x86/kernel/process.c
View File

@ -76,10 +76,9 @@ void free_thread_xstate(struct task_struct *tsk)
fpu_free(&tsk->thread.fpu);
}
void free_thread_info(struct thread_info *ti)
void arch_release_task_struct(struct task_struct *tsk)
{
free_thread_xstate(ti->task);
free_pages((unsigned long)ti, THREAD_ORDER);
free_thread_xstate(tsk);
}
void arch_task_cache_init(void)