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authorPaul Mundt <lethal@linux-sh.org>2010-01-12 19:01:11 +0900
committerPaul Mundt <lethal@linux-sh.org>2010-01-12 19:01:11 +0900
commitcbf6b1ba7ae12b3f7cb6b0d060b88d44649f9eda (patch)
tree267582b42611b11c6a01681855d190bacf488b01 /arch
parent70e068eef97d05c97c3512f82352f39fdadfa8cb (diff)
sh: Always provide thread_info allocators.
Presently the thread_info allocators are special cased, depending on THREAD_SHIFT < PAGE_SHIFT. This provides a sensible definition for them regardless of configuration, in preparation for extended CPU state. Signed-off-by: Paul Mundt <lethal@linux-sh.org>
Diffstat (limited to 'arch')
-rw-r--r--arch/sh/include/asm/thread_info.h6
-rw-r--r--arch/sh/kernel/Makefile4
-rw-r--r--arch/sh/kernel/process.c47
-rw-r--r--arch/sh/mm/init.c29
4 files changed, 51 insertions, 35 deletions
diff --git a/arch/sh/include/asm/thread_info.h b/arch/sh/include/asm/thread_info.h
index 1f3d927e226..2c5b48edeab 100644
--- a/arch/sh/include/asm/thread_info.h
+++ b/arch/sh/include/asm/thread_info.h
@@ -93,14 +93,12 @@ static inline struct thread_info *current_thread_info(void)
#define THREAD_SIZE_ORDER (THREAD_SHIFT - PAGE_SHIFT)
-#else /* THREAD_SHIFT < PAGE_SHIFT */
-
-#define __HAVE_ARCH_THREAD_INFO_ALLOCATOR
+#endif
extern struct thread_info *alloc_thread_info(struct task_struct *tsk);
extern void free_thread_info(struct thread_info *ti);
-#endif /* THREAD_SHIFT < PAGE_SHIFT */
+#define __HAVE_ARCH_THREAD_INFO_ALLOCATOR
#endif /* __ASSEMBLY__ */
diff --git a/arch/sh/kernel/Makefile b/arch/sh/kernel/Makefile
index 5bec10c8bd7..379053c008f 100644
--- a/arch/sh/kernel/Makefile
+++ b/arch/sh/kernel/Makefile
@@ -13,8 +13,8 @@ CFLAGS_REMOVE_return_address.o = -pg
obj-y := debugtraps.o dma-nommu.o dumpstack.o \
idle.o io.o io_generic.o irq.o \
- irq_$(BITS).o machvec.o nmi_debug.o process_$(BITS).o \
- ptrace_$(BITS).o return_address.o \
+ irq_$(BITS).o machvec.o nmi_debug.o process.o \
+ process_$(BITS).o ptrace_$(BITS).o return_address.o \
setup.o signal_$(BITS).o sys_sh.o sys_sh$(BITS).o \
syscalls_$(BITS).o time.o topology.o traps.o \
traps_$(BITS).o unwinder.o
diff --git a/arch/sh/kernel/process.c b/arch/sh/kernel/process.c
new file mode 100644
index 00000000000..b2bda83baee
--- /dev/null
+++ b/arch/sh/kernel/process.c
@@ -0,0 +1,47 @@
+#include <linux/mm.h>
+#include <linux/kernel.h>
+#include <linux/sched.h>
+
+#if THREAD_SHIFT < PAGE_SHIFT
+static struct kmem_cache *thread_info_cache;
+
+struct thread_info *alloc_thread_info(struct task_struct *tsk)
+{
+ struct thread_info *ti;
+
+ ti = kmem_cache_alloc(thread_info_cache, GFP_KERNEL);
+ if (unlikely(ti == NULL))
+ return NULL;
+#ifdef CONFIG_DEBUG_STACK_USAGE
+ memset(ti, 0, THREAD_SIZE);
+#endif
+ return ti;
+}
+
+void free_thread_info(struct thread_info *ti)
+{
+ kmem_cache_free(thread_info_cache, ti);
+}
+
+void thread_info_cache_init(void)
+{
+ thread_info_cache = kmem_cache_create("thread_info", THREAD_SIZE,
+ THREAD_SIZE, 0, NULL);
+ BUG_ON(thread_info_cache == NULL);
+}
+#else
+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);
+}
+
+void free_thread_info(struct thread_info *ti)
+{
+ free_pages((unsigned long)ti, THREAD_SIZE_ORDER);
+}
+#endif /* THREAD_SHIFT < PAGE_SHIFT */
diff --git a/arch/sh/mm/init.c b/arch/sh/mm/init.c
index 761910d142f..d5fb014279a 100644
--- a/arch/sh/mm/init.c
+++ b/arch/sh/mm/init.c
@@ -283,35 +283,6 @@ void free_initrd_mem(unsigned long start, unsigned long end)
}
#endif
-#if THREAD_SHIFT < PAGE_SHIFT
-static struct kmem_cache *thread_info_cache;
-
-struct thread_info *alloc_thread_info(struct task_struct *tsk)
-{
- struct thread_info *ti;
-
- ti = kmem_cache_alloc(thread_info_cache, GFP_KERNEL);
- if (unlikely(ti == NULL))
- return NULL;
-#ifdef CONFIG_DEBUG_STACK_USAGE
- memset(ti, 0, THREAD_SIZE);
-#endif
- return ti;
-}
-
-void free_thread_info(struct thread_info *ti)
-{
- kmem_cache_free(thread_info_cache, ti);
-}
-
-void thread_info_cache_init(void)
-{
- thread_info_cache = kmem_cache_create("thread_info", THREAD_SIZE,
- THREAD_SIZE, 0, NULL);
- BUG_ON(thread_info_cache == NULL);
-}
-#endif /* THREAD_SHIFT < PAGE_SHIFT */
-
#ifdef CONFIG_MEMORY_HOTPLUG
int arch_add_memory(int nid, u64 start, u64 size)
{