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clean up duplicated alloc/free_thread_info 

We duplicate alloc/free_thread_info defines on many platforms (the
majority uses __get_free_pages/free_pages).  This patch defines common
defines and removes these duplicated defines.
__HAVE_ARCH_THREAD_INFO_ALLOCATOR is introduced for platforms that do
something different.

Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
Acked-by: Russell King <rmk+kernel@arm.linux.org.uk>
Cc: Pekka Enberg <penberg@cs.helsinki.fi>
Cc: <linux-arch@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
FUJITA Tomonori 2008-07-25 01:45:40 -07:00 committed by Linus Torvalds
parent 62ec30d45e
commit b69c49b784
23 changed files with 50 additions and 80 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
include/asm-alpha/thread_info.h
View File

@ -50,10 +50,8 @@ register struct thread_info *__current_thread_info __asm__("$8");
#define current_thread_info() __current_thread_info
/* Thread information allocation. */
#define THREAD_SIZE_ORDER 1
#define THREAD_SIZE (2*PAGE_SIZE)
#define alloc_thread_info(tsk) \
((struct thread_info *) __get_free_pages(GFP_KERNEL,1))
#define free_thread_info(ti) free_pages((unsigned long) (ti), 1)
#endif /* __ASSEMBLY__ */

13
include/asm-arm/thread_info.h
View File

@ -97,19 +97,6 @@ static inline struct thread_info *current_thread_info(void)
return (struct thread_info *)(sp & ~(THREAD_SIZE - 1));
}
/* thread information allocation */
#ifdef CONFIG_DEBUG_STACK_USAGE
#define alloc_thread_info(tsk) \
((struct thread_info *)__get_free_pages(GFP_KERNEL | __GFP_ZERO, \
THREAD_SIZE_ORDER))
#else
#define alloc_thread_info(tsk) \
((struct thread_info *)__get_free_pages(GFP_KERNEL, THREAD_SIZE_ORDER))
#endif
#define free_thread_info(info) \
free_pages((unsigned long)info, THREAD_SIZE_ORDER);
#define thread_saved_pc(tsk) \
((unsigned long)(pc_pointer(task_thread_info(tsk)->cpu_context.pc)))
#define thread_saved_fp(tsk) \

4
include/asm-avr32/thread_info.h
View File

@ -61,10 +61,6 @@ static inline struct thread_info *current_thread_info(void)
return (struct thread_info *)addr;
}
/* thread information allocation */
#define alloc_thread_info(ti) \
((struct thread_info *) __get_free_pages(GFP_KERNEL, THREAD_SIZE_ORDER))
#define free_thread_info(ti) free_pages((unsigned long)(ti), 1)
#define get_thread_info(ti) get_task_struct((ti)->task)
#define put_thread_info(ti) put_task_struct((ti)->task)

5
include/asm-blackfin/thread_info.h
View File

@ -42,6 +42,7 @@
/*
* Size of kernel stack for each process. This must be a power of 2...
*/
#define THREAD_SIZE_ORDER 1
#define THREAD_SIZE 8192 /* 2 pages */
#ifndef __ASSEMBLY__
@ -94,10 +95,6 @@ static inline struct thread_info *current_thread_info(void)
return (struct thread_info *)((long)ti & ~((long)THREAD_SIZE-1));
}
/* thread information allocation */
#define alloc_thread_info(tsk) ((struct thread_info *) \
__get_free_pages(GFP_KERNEL, 1))
#define free_thread_info(ti) free_pages((unsigned long) (ti), 1)
#endif /* __ASSEMBLY__ */
/*

2
include/asm-cris/thread_info.h
View File

@ -11,6 +11,8 @@
#ifdef __KERNEL__
#define __HAVE_ARCH_THREAD_INFO_ALLOCATOR
#ifndef __ASSEMBLY__
#include <asm/types.h>
#include <asm/processor.h>

2
include/asm-frv/thread_info.h
View File

@ -82,6 +82,8 @@ register struct thread_info *__current_thread_info asm("gr15");
#define current_thread_info() ({ __current_thread_info; })
#define __HAVE_ARCH_THREAD_INFO_ALLOCATOR
/* thread information allocation */
#ifdef CONFIG_DEBUG_STACK_USAGE
#define alloc_thread_info(tsk) \

5
include/asm-h8300/thread_info.h
View File

@ -49,6 +49,7 @@ struct thread_info {
/*
* Size of kernel stack for each process. This must be a power of 2...
*/
#define THREAD_SIZE_ORDER 1
#define THREAD_SIZE 8192 /* 2 pages */
@ -65,10 +66,6 @@ static inline struct thread_info *current_thread_info(void)
return ti;
}
/* thread information allocation */
#define alloc_thread_info(tsk) ((struct thread_info *) \
__get_free_pages(GFP_KERNEL, 1))
#define free_thread_info(ti) free_pages((unsigned long) (ti), 1)
#endif /* __ASSEMBLY__ */
/*

2
include/asm-ia64/thread_info.h
View File

@ -54,6 +54,8 @@ struct thread_info {
}, \
}
#define __HAVE_ARCH_THREAD_INFO_ALLOCATOR
#ifndef ASM_OFFSETS_C
/* how to get the thread information struct from C */
#define current_thread_info() ((struct thread_info *) ((char *) current + IA64_TASK_SIZE))

2
include/asm-m32r/thread_info.h
View File

@ -94,6 +94,8 @@ static inline struct thread_info *current_thread_info(void)
return ti;
}
#define __HAVE_ARCH_THREAD_INFO_ALLOCATOR
/* thread information allocation */
#ifdef CONFIG_DEBUG_STACK_USAGE
#define alloc_thread_info(tsk) \

8
include/asm-m68k/thread_info.h
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@ -25,13 +25,7 @@ struct thread_info {
}
/* THREAD_SIZE should be 8k, so handle differently for 4k and 8k machines */
#if PAGE_SHIFT == 13 /* 8k machines */
#define alloc_thread_info(tsk) ((struct thread_info *)__get_free_pages(GFP_KERNEL,0))
#define free_thread_info(ti) free_pages((unsigned long)(ti),0)
#else /* otherwise assume 4k pages */
#define alloc_thread_info(tsk) ((struct thread_info *)__get_free_pages(GFP_KERNEL,1))
#define free_thread_info(ti) free_pages((unsigned long)(ti),1)
#endif /* PAGE_SHIFT == 13 */
#define THREAD_SIZE_ORDER (13 - PAGE_SHIFT)
#define init_thread_info (init_task.thread.info)
#define init_stack (init_thread_union.stack)

4
include/asm-m68knommu/thread_info.h
View File

@ -71,10 +71,6 @@ static inline struct thread_info *current_thread_info(void)
return ti;
}
/* thread information allocation */
#define alloc_thread_info(tsk) ((struct thread_info *) \
__get_free_pages(GFP_KERNEL, THREAD_SIZE_ORDER))
#define free_thread_info(ti) free_pages((unsigned long) (ti), THREAD_SIZE_ORDER)
#endif /* __ASSEMBLY__ */
#define PREEMPT_ACTIVE 0x4000000

2
include/asm-mips/thread_info.h
View File

@ -82,6 +82,8 @@ register struct thread_info *__current_thread_info __asm__("$28");
#define THREAD_SIZE (PAGE_SIZE << THREAD_SIZE_ORDER)
#define THREAD_MASK (THREAD_SIZE - 1UL)
#define __HAVE_ARCH_THREAD_INFO_ALLOCATOR
#ifdef CONFIG_DEBUG_STACK_USAGE
#define alloc_thread_info(tsk) \
({ \

2
include/asm-mn10300/thread_info.h
View File

@ -112,6 +112,8 @@ static inline unsigned long current_stack_pointer(void)
return sp;
}
#define __HAVE_ARCH_THREAD_INFO_ALLOCATOR
/* thread information allocation */
#ifdef CONFIG_DEBUG_STACK_USAGE
#define alloc_thread_info(tsk) kzalloc(THREAD_SIZE, GFP_KERNEL)

10
include/asm-parisc/thread_info.h
View File

@ -34,15 +34,11 @@ struct thread_info {
/* thread information allocation */
#define THREAD_ORDER 2
#define THREAD_SIZE_ORDER 2
/* Be sure to hunt all references to this down when you change the size of
* the kernel stack */
#define THREAD_SIZE (PAGE_SIZE << THREAD_ORDER)
#define THREAD_SHIFT (PAGE_SHIFT + THREAD_ORDER)
#define alloc_thread_info(tsk) ((struct thread_info *) \
__get_free_pages(GFP_KERNEL, THREAD_ORDER))
#define free_thread_info(ti) free_pages((unsigned long) (ti), THREAD_ORDER)
#define THREAD_SIZE (PAGE_SIZE << THREAD_SIZE_ORDER)
#define THREAD_SHIFT (PAGE_SHIFT + THREAD_SIZE_ORDER)
/* how to get the thread information struct from C */
#define current_thread_info() ((struct thread_info *)mfctl(30))

14
include/asm-powerpc/thread_info.h
View File

@ -66,20 +66,12 @@ struct thread_info {
#if THREAD_SHIFT >= PAGE_SHIFT
#define THREAD_ORDER (THREAD_SHIFT - PAGE_SHIFT)
#ifdef CONFIG_DEBUG_STACK_USAGE
#define alloc_thread_info(tsk) \
((struct thread_info *)__get_free_pages(GFP_KERNEL | \
__GFP_ZERO, THREAD_ORDER))
#else
#define alloc_thread_info(tsk) \
((struct thread_info *)__get_free_pages(GFP_KERNEL, THREAD_ORDER))
#endif
#define free_thread_info(ti) free_pages((unsigned long)ti, THREAD_ORDER)
#define THREAD_SIZE_ORDER (THREAD_SHIFT - PAGE_SHIFT)
#else /* THREAD_SHIFT < PAGE_SHIFT */
#define __HAVE_ARCH_THREAD_INFO_ALLOCATOR
extern struct thread_info *alloc_thread_info(struct task_struct *tsk);
extern void free_thread_info(struct thread_info *ti);

5
include/asm-s390/thread_info.h
View File

@ -78,10 +78,7 @@ static inline struct thread_info *current_thread_info(void)
return (struct thread_info *)((*(unsigned long *) __LC_KERNEL_STACK)-THREAD_SIZE);
}
/* thread information allocation */
#define alloc_thread_info(tsk) ((struct thread_info *) \
__get_free_pages(GFP_KERNEL,THREAD_ORDER))
#define free_thread_info(ti) free_pages((unsigned long) (ti),THREAD_ORDER)
#define THREAD_SIZE_ORDER THREAD_ORDER
#endif

2
include/asm-sh/thread_info.h
View File

@ -92,6 +92,8 @@ static inline struct thread_info *current_thread_info(void)
return ti;
}
#define __HAVE_ARCH_THREAD_INFO_ALLOCATOR
/* thread information allocation */
#ifdef CONFIG_DEBUG_STACK_USAGE
#define alloc_thread_info(ti) kzalloc(THREAD_SIZE, GFP_KERNEL)

2
include/asm-sparc/thread_info_32.h
View File

@ -86,6 +86,8 @@ register struct thread_info *current_thread_info_reg asm("g6");
#define THREAD_INFO_ORDER 1
#endif
#define __HAVE_ARCH_THREAD_INFO_ALLOCATOR
BTFIXUPDEF_CALL(struct thread_info *, alloc_thread_info, void)
#define alloc_thread_info(tsk) BTFIXUP_CALL(alloc_thread_info)()

2
include/asm-sparc/thread_info_64.h
View File

@ -155,6 +155,8 @@ register struct thread_info *current_thread_info_reg asm("g6");
#define __THREAD_INFO_ORDER 0
#endif /* PAGE_SHIFT == 13 */
#define __HAVE_ARCH_THREAD_INFO_ALLOCATOR
#ifdef CONFIG_DEBUG_STACK_USAGE
#define alloc_thread_info(tsk) \
({ \

16
include/asm-um/thread_info.h
View File

@ -53,21 +53,7 @@ static inline struct thread_info *current_thread_info(void)
return ti;
}
#ifdef CONFIG_DEBUG_STACK_USAGE
#define alloc_thread_info(tsk) \
((struct thread_info *) __get_free_pages(GFP_KERNEL | __GFP_ZERO, \
CONFIG_KERNEL_STACK_ORDER))
#else
/* thread information allocation */
#define alloc_thread_info(tsk) \
((struct thread_info *) __get_free_pages(GFP_KERNEL, \
CONFIG_KERNEL_STACK_ORDER))
#endif
#define free_thread_info(ti) \
free_pages((unsigned long)(ti),CONFIG_KERNEL_STACK_ORDER)
#define THREAD_SIZE_ORDER CONFIG_KERNEL_STACK_ORDER
#endif

2
include/asm-x86/thread_info.h
View File

@ -152,6 +152,8 @@ struct thread_info {
#define THREAD_FLAGS GFP_KERNEL
#endif
#define __HAVE_ARCH_THREAD_INFO_ALLOCATOR
#define alloc_thread_info(tsk) \
((struct thread_info *)__get_free_pages(THREAD_FLAGS, THREAD_ORDER))

5
include/asm-xtensa/thread_info.h
View File

@ -111,10 +111,6 @@ static inline struct thread_info *current_thread_info(void)
return ti;
}
/* thread information allocation */
#define alloc_thread_info(tsk) ((struct thread_info *) __get_free_pages(GFP_KERNEL,1))
#define free_thread_info(ti) free_pages((unsigned long) (ti), 1)
#else /* !__ASSEMBLY__ */
/* how to get the thread information struct from ASM */
@ -160,6 +156,7 @@ static inline struct thread_info *current_thread_info(void)
#define TS_USEDFPU 0x0001 /* FPU was used by this task this quantum (SMP) */
#define THREAD_SIZE 8192 //(2*PAGE_SIZE)
#define THREAD_SIZE_ORDER 1
#endif /* __KERNEL__ */
#endif /* _XTENSA_THREAD_INFO */

17
kernel/fork.c
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@ -93,6 +93,23 @@ int nr_processes(void)
static struct kmem_cache *task_struct_cachep;
#endif
#ifndef __HAVE_ARCH_THREAD_INFO_ALLOCATOR
static inline struct thread_info *alloc_thread_info(struct task_struct *tsk)
{
#ifdef CONFIG_DEBUG_STACK_USAGE
gfp_t mask = GFP_KERNEL | __GFP_ZERO;
#else
gfp_t mask = GFP_KERNEL;
#endif
return (struct thread_info *)__get_free_pages(mask, THREAD_SIZE_ORDER);
}
static inline void free_thread_info(struct thread_info *ti)
{
free_pages((unsigned long)ti, THREAD_SIZE_ORDER);
}
#endif
/* SLAB cache for signal_struct structures (tsk->signal) */
static struct kmem_cache *signal_cachep;