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Subject[patch 05/18] 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>
Cc: x86@kernel.org
---
arch/x86/include/asm/boot.h | 2 +-
arch/x86/include/asm/page_32_types.h | 4 ++--
arch/x86/include/asm/page_64_types.h | 4 ++--
arch/x86/include/asm/thread_info.h | 20 +-------------------
arch/x86/kernel/irq_32.c | 8 ++++----
arch/x86/kernel/process.c | 5 ++---
6 files changed, 12 insertions(+), 31 deletions(-)
Index: tip/arch/x86/include/asm/boot.h
===================================================================
--- tip.orig/arch/x86/include/asm/boot.h
+++ tip/arch/x86/include/asm/boot.h
@@ -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)

Index: tip/arch/x86/include/asm/page_32_types.h
===================================================================
--- tip.orig/arch/x86/include/asm/page_32_types.h
+++ tip/arch/x86/include/asm/page_32_types.h
@@ -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
Index: tip/arch/x86/include/asm/page_64_types.h
===================================================================
--- tip.orig/arch/x86/include/asm/page_64_types.h
+++ tip/arch/x86/include/asm/page_64_types.h
@@ -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
Index: tip/arch/x86/include/asm/thread_info.h
===================================================================
--- tip.orig/arch/x86/include/asm/thread_info.h
+++ tip/arch/x86/include/asm/thread_info.h
@@ -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 */
Index: tip/arch/x86/kernel/irq_32.c
===================================================================
--- tip.orig/arch/x86/kernel/irq_32.c
+++ tip/arch/x86/kernel/irq_32.c
@@ -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);
Index: tip/arch/x86/kernel/process.c
===================================================================
--- tip.orig/arch/x86/kernel/process.c
+++ tip/arch/x86/kernel/process.c
@@ -76,10 +76,9 @@ void free_thread_xstate(struct task_stru
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)



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