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authorMax Filippov <jcmvbkbc@gmail.com>2017-12-04 19:47:43 +0100
committerMax Filippov <jcmvbkbc@gmail.com>2017-12-10 23:48:55 +0100
commitf4431396be5b26a9960daf502d129b1b5d126f5e (patch)
treef37f6b0f91e8aae16f13622e81a838d7395de957 /arch/xtensa
parentxtensa: clean up functions in assembly code (diff)
downloadlinux-f4431396be5b26a9960daf502d129b1b5d126f5e.tar.xz
linux-f4431396be5b26a9960daf502d129b1b5d126f5e.zip
xtensa: consolidate kernel stack size related definitions
Define kernel stack size in kmem_layout and use it in current_thread_info, GET_THREAD_INFO, THREAD_SIZE and THERAD_SIZE_ORDER definitions. Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
Diffstat (limited to 'arch/xtensa')
-rw-r--r--arch/xtensa/include/asm/current.h4
-rw-r--r--arch/xtensa/include/asm/kmem_layout.h3
-rw-r--r--arch/xtensa/include/asm/ptrace.h3
-rw-r--r--arch/xtensa/include/asm/thread_info.h13
4 files changed, 13 insertions, 10 deletions
diff --git a/arch/xtensa/include/asm/current.h b/arch/xtensa/include/asm/current.h
index 47e46dcf5d49..5d98a7ad4251 100644
--- a/arch/xtensa/include/asm/current.h
+++ b/arch/xtensa/include/asm/current.h
@@ -11,6 +11,8 @@
#ifndef _XTENSA_CURRENT_H
#define _XTENSA_CURRENT_H
+#include <asm/thread_info.h>
+
#ifndef __ASSEMBLY__
#include <linux/thread_info.h>
@@ -26,8 +28,6 @@ static inline struct task_struct *get_current(void)
#else
-#define CURRENT_SHIFT 13
-
#define GET_CURRENT(reg,sp) \
GET_THREAD_INFO(reg,sp); \
l32i reg, reg, TI_TASK \
diff --git a/arch/xtensa/include/asm/kmem_layout.h b/arch/xtensa/include/asm/kmem_layout.h
index 561f8729bcde..28f9260a766c 100644
--- a/arch/xtensa/include/asm/kmem_layout.h
+++ b/arch/xtensa/include/asm/kmem_layout.h
@@ -71,4 +71,7 @@
#endif
+#define KERNEL_STACK_SHIFT 13
+#define KERNEL_STACK_SIZE (1 << KERNEL_STACK_SHIFT)
+
#endif
diff --git a/arch/xtensa/include/asm/ptrace.h b/arch/xtensa/include/asm/ptrace.h
index e2d9c5eb10bd..05beae3c6376 100644
--- a/arch/xtensa/include/asm/ptrace.h
+++ b/arch/xtensa/include/asm/ptrace.h
@@ -10,6 +10,7 @@
#ifndef _XTENSA_PTRACE_H
#define _XTENSA_PTRACE_H
+#include <asm/kmem_layout.h>
#include <uapi/asm/ptrace.h>
/*
@@ -38,8 +39,6 @@
* +-----------------------+ --------
*/
-#define KERNEL_STACK_SIZE (2 * PAGE_SIZE)
-
/* Offsets for exception_handlers[] (3 x 64-entries x 4-byte tables). */
#define EXC_TABLE_KSTK 0x004 /* Kernel Stack */
diff --git a/arch/xtensa/include/asm/thread_info.h b/arch/xtensa/include/asm/thread_info.h
index 7be2400f745a..71c9865218ce 100644
--- a/arch/xtensa/include/asm/thread_info.h
+++ b/arch/xtensa/include/asm/thread_info.h
@@ -11,7 +11,9 @@
#ifndef _XTENSA_THREAD_INFO_H
#define _XTENSA_THREAD_INFO_H
-#ifdef __KERNEL__
+#include <asm/kmem_layout.h>
+
+#define CURRENT_SHIFT KERNEL_STACK_SHIFT
#ifndef __ASSEMBLY__
# include <asm/processor.h>
@@ -84,7 +86,7 @@ struct thread_info {
static inline struct thread_info *current_thread_info(void)
{
struct thread_info *ti;
- __asm__("extui %0,a1,0,13\n\t"
+ __asm__("extui %0, a1, 0, "__stringify(CURRENT_SHIFT)"\n\t"
"xor %0, a1, %0" : "=&r" (ti) : );
return ti;
}
@@ -93,7 +95,7 @@ static inline struct thread_info *current_thread_info(void)
/* how to get the thread information struct from ASM */
#define GET_THREAD_INFO(reg,sp) \
- extui reg, sp, 0, 13; \
+ extui reg, sp, 0, CURRENT_SHIFT; \
xor reg, sp, reg
#endif
@@ -130,8 +132,7 @@ 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
+#define THREAD_SIZE KERNEL_STACK_SIZE
+#define THREAD_SIZE_ORDER (KERNEL_STACK_SHIFT - PAGE_SHIFT)
-#endif /* __KERNEL__ */
#endif /* _XTENSA_THREAD_INFO */