The patch titled
rename thread_info to stack
has been removed from the -mm tree. Its filename was
rename-thread_info-to-stack.patch
This patch was dropped because it was merged into mainline or a subsystem tree
------------------------------------------------------
Subject: rename thread_info to stack
From: Roman Zippel <zippel@xxxxxxxxxxxxxx>
This finally renames the thread_info field in task structure to stack, so that
the assumptions about this field are gone and archs have more freedom about
placing the thread_info structure.
Nonbroken archs which have a proper thread pointer can do the access to both
current thread and task structure via a single pointer.
It'll allow for a few more cleanups of the fork code, from which e.g. ia64
could benefit.
Signed-off-by: Roman Zippel <zippel@xxxxxxxxxxxxxx>
[akpm@xxxxxxxxxxxxxxxxxxxx: build fix]
Cc: Richard Henderson <rth@xxxxxxxxxxx>
Cc: Ivan Kokshaysky <ink@xxxxxxxxxxxxxxxxxxxx>
Cc: Russell King <rmk@xxxxxxxxxxxxxxxx>
Cc: Ian Molton <spyro@xxxxxxx>
Cc: Haavard Skinnemoen <hskinnemoen@xxxxxxxxx>
Cc: Mikael Starvik <starvik@xxxxxxxx>
Cc: David Howells <dhowells@xxxxxxxxxx>
Cc: Yoshinori Sato <ysato@xxxxxxxxxxxxxxxxxxxx>
Cc: "Luck, Tony" <tony.luck@xxxxxxxxx>
Cc: Hirokazu Takata <takata@xxxxxxxxxxxxxx>
Cc: Geert Uytterhoeven <geert@xxxxxxxxxxxxxx>
Cc: Roman Zippel <zippel@xxxxxxxxxxxxxx>
Cc: Greg Ungerer <gerg@xxxxxxxxxxx>
Cc: Ralf Baechle <ralf@xxxxxxxxxxxxxx>
Cc: Ralf Baechle <ralf@xxxxxxxxxxxxxx>
Cc: Paul Mackerras <paulus@xxxxxxxxx>
Cc: Benjamin Herrenschmidt <benh@xxxxxxxxxxxxxxxxxxx>
Cc: Heiko Carstens <heiko.carstens@xxxxxxxxxx>
Cc: Martin Schwidefsky <schwidefsky@xxxxxxxxxx>
Cc: Paul Mundt <lethal@xxxxxxxxxxxx>
Cc: Kazumoto Kojima <kkojima@xxxxxxxxxxxxxx>
Cc: Richard Curnow <rc@xxxxxxxxxx>
Cc: William Lee Irwin III <wli@xxxxxxxxxxxxxx>
Cc: "David S. Miller" <davem@xxxxxxxxxxxxx>
Cc: Jeff Dike <jdike@xxxxxxxxxxx>
Cc: Paolo 'Blaisorblade' Giarrusso <blaisorblade@xxxxxxxx>
Cc: Miles Bader <uclinux-v850@xxxxxxxxxxxxx>
Cc: Andi Kleen <ak@xxxxxx>
Cc: Chris Zankel <chris@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
arch/blackfin/kernel/ptrace.c | 6 +++---
arch/h8300/kernel/asm-offsets.c | 2 +-
arch/ia64/kernel/mca.c | 2 +-
arch/mips/kernel/asm-offsets.c | 2 +-
arch/parisc/kernel/asm-offsets.c | 2 +-
arch/powerpc/kernel/asm-offsets.c | 2 +-
arch/ppc/kernel/asm-offsets.c | 2 +-
arch/s390/kernel/asm-offsets.c | 2 +-
arch/sparc/kernel/asm-offsets.c | 2 +-
arch/v850/kernel/asm-offsets.c | 2 +-
arch/xtensa/kernel/asm-offsets.c | 2 +-
include/asm-alpha/thread_info.h | 8 ++++----
include/asm-blackfin/processor.h | 6 +++---
include/asm-blackfin/system.h | 4 ++--
include/asm-m68k/thread_info.h | 6 +++---
include/asm-x86_64/system.h | 2 +-
include/linux/init_task.h | 2 +-
include/linux/sched.h | 8 ++++----
kernel/fork.c | 4 ++--
19 files changed, 33 insertions(+), 33 deletions(-)
diff -puN arch/blackfin/kernel/ptrace.c~rename-thread_info-to-stack arch/blackfin/kernel/ptrace.c
--- a/arch/blackfin/kernel/ptrace.c~rename-thread_info-to-stack
+++ a/arch/blackfin/kernel/ptrace.c
@@ -73,7 +73,7 @@
static inline struct pt_regs *get_user_regs(struct task_struct *task)
{
return (struct pt_regs *)
- ((unsigned long)task->thread_info +
+ ((unsigned long)task_stack_page(task) +
(THREAD_SIZE - sizeof(struct pt_regs)));
}
@@ -99,7 +99,7 @@ static inline long get_reg(struct task_s
unsigned char *reg_ptr;
struct pt_regs *regs =
- (struct pt_regs *)((unsigned long)task->thread_info +
+ (struct pt_regs *)((unsigned long)task_stack_page(task) +
(THREAD_SIZE - sizeof(struct pt_regs)));
reg_ptr = (char *)regs;
@@ -125,7 +125,7 @@ put_reg(struct task_struct *task, int re
char * reg_ptr;
struct pt_regs *regs =
- (struct pt_regs *)((unsigned long)task->thread_info +
+ (struct pt_regs *)((unsigned long)task_stack_page(task) +
(THREAD_SIZE - sizeof(struct pt_regs)));
reg_ptr = (char *)regs;
diff -puN arch/h8300/kernel/asm-offsets.c~rename-thread_info-to-stack arch/h8300/kernel/asm-offsets.c
--- a/arch/h8300/kernel/asm-offsets.c~rename-thread_info-to-stack
+++ a/arch/h8300/kernel/asm-offsets.c
@@ -30,7 +30,7 @@ int main(void)
DEFINE(TASK_PTRACE, offsetof(struct task_struct, ptrace));
DEFINE(TASK_BLOCKED, offsetof(struct task_struct, blocked));
DEFINE(TASK_THREAD, offsetof(struct task_struct, thread));
- DEFINE(TASK_THREAD_INFO, offsetof(struct task_struct, thread_info));
+ DEFINE(TASK_THREAD_INFO, offsetof(struct task_struct, stack));
DEFINE(TASK_MM, offsetof(struct task_struct, mm));
DEFINE(TASK_ACTIVE_MM, offsetof(struct task_struct, active_mm));
diff -puN arch/ia64/kernel/mca.c~rename-thread_info-to-stack arch/ia64/kernel/mca.c
--- a/arch/ia64/kernel/mca.c~rename-thread_info-to-stack
+++ a/arch/ia64/kernel/mca.c
@@ -1689,7 +1689,7 @@ format_mca_init_stack(void *mca_data, un
ti->preempt_count = 1;
ti->task = p;
ti->cpu = cpu;
- p->thread_info = ti;
+ p->stack = ti;
p->state = TASK_UNINTERRUPTIBLE;
cpu_set(cpu, p->cpus_allowed);
INIT_LIST_HEAD(&p->tasks);
diff -puN arch/mips/kernel/asm-offsets.c~rename-thread_info-to-stack arch/mips/kernel/asm-offsets.c
--- a/arch/mips/kernel/asm-offsets.c~rename-thread_info-to-stack
+++ a/arch/mips/kernel/asm-offsets.c
@@ -82,7 +82,7 @@ void output_task_defines(void)
{
text("/* MIPS task_struct offsets. */");
offset("#define TASK_STATE ", struct task_struct, state);
- offset("#define TASK_THREAD_INFO ", struct task_struct, thread_info);
+ offset("#define TASK_THREAD_INFO ", struct task_struct, stack);
offset("#define TASK_FLAGS ", struct task_struct, flags);
offset("#define TASK_MM ", struct task_struct, mm);
offset("#define TASK_PID ", struct task_struct, pid);
diff -puN arch/parisc/kernel/asm-offsets.c~rename-thread_info-to-stack arch/parisc/kernel/asm-offsets.c
--- a/arch/parisc/kernel/asm-offsets.c~rename-thread_info-to-stack
+++ a/arch/parisc/kernel/asm-offsets.c
@@ -54,7 +54,7 @@
int main(void)
{
- DEFINE(TASK_THREAD_INFO, offsetof(struct task_struct, thread_info));
+ DEFINE(TASK_THREAD_INFO, offsetof(struct task_struct, stack));
DEFINE(TASK_STATE, offsetof(struct task_struct, state));
DEFINE(TASK_FLAGS, offsetof(struct task_struct, flags));
DEFINE(TASK_SIGPENDING, offsetof(struct task_struct, pending));
diff -puN arch/powerpc/kernel/asm-offsets.c~rename-thread_info-to-stack arch/powerpc/kernel/asm-offsets.c
--- a/arch/powerpc/kernel/asm-offsets.c~rename-thread_info-to-stack
+++ a/arch/powerpc/kernel/asm-offsets.c
@@ -58,7 +58,7 @@ int main(void)
#ifdef CONFIG_PPC64
DEFINE(AUDITCONTEXT, offsetof(struct task_struct, audit_context));
#else
- DEFINE(THREAD_INFO, offsetof(struct task_struct, thread_info));
+ DEFINE(THREAD_INFO, offsetof(struct task_struct, stack));
DEFINE(PTRACE, offsetof(struct task_struct, ptrace));
#endif /* CONFIG_PPC64 */
diff -puN arch/ppc/kernel/asm-offsets.c~rename-thread_info-to-stack arch/ppc/kernel/asm-offsets.c
--- a/arch/ppc/kernel/asm-offsets.c~rename-thread_info-to-stack
+++ a/arch/ppc/kernel/asm-offsets.c
@@ -35,7 +35,7 @@ int
main(void)
{
DEFINE(THREAD, offsetof(struct task_struct, thread));
- DEFINE(THREAD_INFO, offsetof(struct task_struct, thread_info));
+ DEFINE(THREAD_INFO, offsetof(struct task_struct, stack));
DEFINE(MM, offsetof(struct task_struct, mm));
DEFINE(PTRACE, offsetof(struct task_struct, ptrace));
DEFINE(KSP, offsetof(struct thread_struct, ksp));
diff -puN arch/s390/kernel/asm-offsets.c~rename-thread_info-to-stack arch/s390/kernel/asm-offsets.c
--- a/arch/s390/kernel/asm-offsets.c~rename-thread_info-to-stack
+++ a/arch/s390/kernel/asm-offsets.c
@@ -15,7 +15,7 @@
int main(void)
{
- DEFINE(__THREAD_info, offsetof(struct task_struct, thread_info),);
+ DEFINE(__THREAD_info, offsetof(struct task_struct, stack),);
DEFINE(__THREAD_ksp, offsetof(struct task_struct, thread.ksp),);
DEFINE(__THREAD_per, offsetof(struct task_struct, thread.per_info),);
DEFINE(__THREAD_mm_segment,
diff -puN arch/sparc/kernel/asm-offsets.c~rename-thread_info-to-stack arch/sparc/kernel/asm-offsets.c
--- a/arch/sparc/kernel/asm-offsets.c~rename-thread_info-to-stack
+++ a/arch/sparc/kernel/asm-offsets.c
@@ -28,7 +28,7 @@ int foo(void)
DEFINE(AOFF_task_gid, offsetof(struct task_struct, gid));
DEFINE(AOFF_task_euid, offsetof(struct task_struct, euid));
DEFINE(AOFF_task_egid, offsetof(struct task_struct, egid));
- /* DEFINE(THREAD_INFO, offsetof(struct task_struct, thread_info)); */
+ /* DEFINE(THREAD_INFO, offsetof(struct task_struct, stack)); */
DEFINE(ASIZ_task_uid, sizeof(current->uid));
DEFINE(ASIZ_task_gid, sizeof(current->gid));
DEFINE(ASIZ_task_euid, sizeof(current->euid));
diff -puN arch/v850/kernel/asm-offsets.c~rename-thread_info-to-stack arch/v850/kernel/asm-offsets.c
--- a/arch/v850/kernel/asm-offsets.c~rename-thread_info-to-stack
+++ a/arch/v850/kernel/asm-offsets.c
@@ -29,7 +29,7 @@ int main (void)
DEFINE (TASK_PTRACE, offsetof (struct task_struct, ptrace));
DEFINE (TASK_BLOCKED, offsetof (struct task_struct, blocked));
DEFINE (TASK_THREAD, offsetof (struct task_struct, thread));
- DEFINE (TASK_THREAD_INFO, offsetof (struct task_struct, thread_info));
+ DEFINE (TASK_THREAD_INFO, offsetof (struct task_struct, stack));
DEFINE (TASK_MM, offsetof (struct task_struct, mm));
DEFINE (TASK_ACTIVE_MM, offsetof (struct task_struct, active_mm));
DEFINE (TASK_PID, offsetof (struct task_struct, pid));
diff -puN arch/xtensa/kernel/asm-offsets.c~rename-thread_info-to-stack arch/xtensa/kernel/asm-offsets.c
--- a/arch/xtensa/kernel/asm-offsets.c~rename-thread_info-to-stack
+++ a/arch/xtensa/kernel/asm-offsets.c
@@ -70,7 +70,7 @@ int main(void)
DEFINE(TASK_ACTIVE_MM, offsetof (struct task_struct, active_mm));
DEFINE(TASK_PID, offsetof (struct task_struct, pid));
DEFINE(TASK_THREAD, offsetof (struct task_struct, thread));
- DEFINE(TASK_THREAD_INFO, offsetof (struct task_struct, thread_info));
+ DEFINE(TASK_THREAD_INFO, offsetof (struct task_struct, stack));
DEFINE(TASK_STRUCT_SIZE, sizeof (struct task_struct));
BLANK();
diff -puN include/asm-alpha/thread_info.h~rename-thread_info-to-stack include/asm-alpha/thread_info.h
--- a/include/asm-alpha/thread_info.h~rename-thread_info-to-stack
+++ a/include/asm-alpha/thread_info.h
@@ -97,7 +97,7 @@ register struct thread_info *__current_t
1 << TIF_UAC_SIGBUS)
#define SET_UNALIGN_CTL(task,value) ({ \
- (task)->thread_info->flags = (((task)->thread_info->flags & \
+ task_thread_info(task)->flags = ((task_thread_info(task)->flags & \
~ALPHA_UAC_MASK) \
| (((value) << ALPHA_UAC_SHIFT) & (1<<TIF_UAC_NOPRINT))\
| (((value) << (ALPHA_UAC_SHIFT + 1)) & (1<<TIF_UAC_SIGBUS)) \
@@ -105,11 +105,11 @@ register struct thread_info *__current_t
0; })
#define GET_UNALIGN_CTL(task,value) ({ \
- put_user(((task)->thread_info->flags & (1 << TIF_UAC_NOPRINT)) \
+ put_user((task_thread_info(task)->flags & (1 << TIF_UAC_NOPRINT))\
>> ALPHA_UAC_SHIFT \
- | ((task)->thread_info->flags & (1 << TIF_UAC_SIGBUS)) \
+ | (task_thread_info(task)->flags & (1 << TIF_UAC_SIGBUS))\
>> (ALPHA_UAC_SHIFT + 1) \
- | ((task)->thread_info->flags & (1 << TIF_UAC_NOFIX)) \
+ | (task_thread_info(task)->flags & (1 << TIF_UAC_NOFIX))\
>> (ALPHA_UAC_SHIFT - 1), \
(int __user *)(value)); \
})
diff -puN include/asm-blackfin/processor.h~rename-thread_info-to-stack include/asm-blackfin/processor.h
--- a/include/asm-blackfin/processor.h~rename-thread_info-to-stack
+++ a/include/asm-blackfin/processor.h
@@ -58,10 +58,10 @@ do { \
(_regs)->pc = (_pc); \
if (current->mm) \
(_regs)->p5 = current->mm->start_data; \
- current->thread_info->l1_task_info.stack_start \
+ task_thread_info(current)->l1_task_info.stack_start \
= (void *)current->mm->context.stack_start; \
- current->thread_info->l1_task_info.lowest_sp = (void *)(_usp); \
- memcpy(L1_SCRATCH_TASK_INFO, ¤t->thread_info->l1_task_info, \
+ task_thread_info(current)->l1_task_info.lowest_sp = (void *)(_usp); \
+ memcpy(L1_SCRATCH_TASK_INFO, &task_thread_info(current)->l1_task_info, \
sizeof(*L1_SCRATCH_TASK_INFO)); \
wrusp(_usp); \
} while(0)
diff -puN include/asm-blackfin/system.h~rename-thread_info-to-stack include/asm-blackfin/system.h
--- a/include/asm-blackfin/system.h~rename-thread_info-to-stack
+++ a/include/asm-blackfin/system.h
@@ -239,9 +239,9 @@ asmlinkage struct task_struct *resume(st
#define switch_to(prev,next,last) \
do { \
- memcpy (&prev->thread_info->l1_task_info, L1_SCRATCH_TASK_INFO, \
+ memcpy (&task_thread_info(prev)->l1_task_info, L1_SCRATCH_TASK_INFO, \
sizeof *L1_SCRATCH_TASK_INFO); \
- memcpy (L1_SCRATCH_TASK_INFO, &next->thread_info->l1_task_info, \
+ memcpy (L1_SCRATCH_TASK_INFO, &task_thread_info(next)->l1_task_info, \
sizeof *L1_SCRATCH_TASK_INFO); \
(last) = resume (prev, next); \
} while (0)
diff -puN include/asm-m68k/thread_info.h~rename-thread_info-to-stack include/asm-m68k/thread_info.h
--- a/include/asm-m68k/thread_info.h~rename-thread_info-to-stack
+++ a/include/asm-m68k/thread_info.h
@@ -37,17 +37,17 @@ struct thread_info {
#define init_stack (init_thread_union.stack)
#define task_thread_info(tsk) (&(tsk)->thread.info)
-#define task_stack_page(tsk) ((void *)(tsk)->thread_info)
+#define task_stack_page(tsk) ((tsk)->stack)
#define current_thread_info() task_thread_info(current)
#define __HAVE_THREAD_FUNCTIONS
#define setup_thread_stack(p, org) ({ \
- *(struct task_struct **)(p)->thread_info = (p); \
+ *(struct task_struct **)(p)->stack = (p); \
task_thread_info(p)->task = (p); \
})
-#define end_of_stack(p) ((unsigned long *)(p)->thread_info + 1)
+#define end_of_stack(p) ((unsigned long *)(p)->stack + 1)
/* entry.S relies on these definitions!
* bits 0-7 are tested at every exception exit
diff -puN include/asm-x86_64/system.h~rename-thread_info-to-stack include/asm-x86_64/system.h
--- a/include/asm-x86_64/system.h~rename-thread_info-to-stack
+++ a/include/asm-x86_64/system.h
@@ -39,7 +39,7 @@
[threadrsp] "i" (offsetof(struct task_struct, thread.rsp)), \
[ti_flags] "i" (offsetof(struct thread_info, flags)),\
[tif_fork] "i" (TIF_FORK), \
- [thread_info] "i" (offsetof(struct task_struct, thread_info)), \
+ [thread_info] "i" (offsetof(struct task_struct, stack)), \
[pda_pcurrent] "i" (offsetof(struct x8664_pda, pcurrent)) \
: "memory", "cc" __EXTRA_CLOBBER)
diff -puN include/linux/init_task.h~rename-thread_info-to-stack include/linux/init_task.h
--- a/include/linux/init_task.h~rename-thread_info-to-stack
+++ a/include/linux/init_task.h
@@ -95,7 +95,7 @@ extern struct group_info init_groups;
#define INIT_TASK(tsk) \
{ \
.state = 0, \
- .thread_info = &init_thread_info, \
+ .stack = &init_thread_info, \
.usage = ATOMIC_INIT(2), \
.flags = 0, \
.lock_depth = -1, \
diff -puN include/linux/sched.h~rename-thread_info-to-stack include/linux/sched.h
--- a/include/linux/sched.h~rename-thread_info-to-stack
+++ a/include/linux/sched.h
@@ -817,7 +817,7 @@ struct prio_array;
struct task_struct {
volatile long state; /* -1 unrunnable, 0 runnable, >0 stopped */
- struct thread_info *thread_info;
+ void *stack;
atomic_t usage;
unsigned int flags; /* per process flags, defined below */
unsigned int ptrace;
@@ -1514,8 +1514,8 @@ static inline void unlock_task_sighand(s
#ifndef __HAVE_THREAD_FUNCTIONS
-#define task_thread_info(task) (task)->thread_info
-#define task_stack_page(task) ((void*)((task)->thread_info))
+#define task_thread_info(task) ((struct thread_info *)(task)->stack)
+#define task_stack_page(task) ((task)->stack)
static inline void setup_thread_stack(struct task_struct *p, struct task_struct *org)
{
@@ -1525,7 +1525,7 @@ static inline void setup_thread_stack(st
static inline unsigned long *end_of_stack(struct task_struct *p)
{
- return (unsigned long *)(p->thread_info + 1);
+ return (unsigned long *)(task_thread_info(p) + 1);
}
#endif
diff -puN kernel/fork.c~rename-thread_info-to-stack kernel/fork.c
--- a/kernel/fork.c~rename-thread_info-to-stack
+++ a/kernel/fork.c
@@ -106,7 +106,7 @@ static struct kmem_cache *mm_cachep;
void free_task(struct task_struct *tsk)
{
- free_thread_info(tsk->thread_info);
+ free_thread_info(tsk->stack);
rt_mutex_debug_task_free(tsk);
free_task_struct(tsk);
}
@@ -176,7 +176,7 @@ static struct task_struct *dup_task_stru
}
*tsk = *orig;
- tsk->thread_info = ti;
+ tsk->stack = ti;
setup_thread_stack(tsk, orig);
#ifdef CONFIG_CC_STACKPROTECTOR
_
Patches currently in -mm which might be from zippel@xxxxxxxxxxxxxx are
origin.patch
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