flagday: don't pass regs to copy_thread() Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

commit: afa86fc426ff7e7f5477f15da9c405d08d5cf790 [log] [tgz]
author: Al Viro <viro@zeniv.linux.org.uk> Mon Oct 22 22:51:14 2012 -0400
committer: Al Viro <viro@zeniv.linux.org.uk> Wed Nov 28 23:43:42 2012 -0500
tree: 0f82925269757902ce6f7c287a968f7b439d2b2d
parent: 135c37b83c81b79a888108e3f7c5f64423d8a851 [diff]
diff --git a/arch/alpha/kernel/process.c b/arch/alpha/kernel/process.c
index e9705bc..b5d0d09 100644
--- a/arch/alpha/kernel/process.c
+++ b/arch/alpha/kernel/process.c

@@ -241,7 +241,7 @@
 int
 copy_thread(unsigned long clone_flags, unsigned long usp,
 	    unsigned long arg,
-	    struct task_struct *p, struct pt_regs *wontuse)
+	    struct task_struct *p)
 {
 	extern void ret_from_fork(void);
 	extern void ret_from_kernel_thread(void);

diff --git a/arch/arm/kernel/process.c b/arch/arm/kernel/process.c
index 4ab80bb..9800338 100644
--- a/arch/arm/kernel/process.c
+++ b/arch/arm/kernel/process.c

@@ -376,7 +376,7 @@
 
 int
 copy_thread(unsigned long clone_flags, unsigned long stack_start,
-	    unsigned long stk_sz, struct task_struct *p, struct pt_regs *unused)
+	    unsigned long stk_sz, struct task_struct *p)
 {
 	struct thread_info *thread = task_thread_info(p);
 	struct pt_regs *childregs = task_pt_regs(p);

diff --git a/arch/arm64/kernel/process.c b/arch/arm64/kernel/process.c
index 5a1335c..cb0956b 100644
--- a/arch/arm64/kernel/process.c
+++ b/arch/arm64/kernel/process.c

@@ -234,8 +234,7 @@
 asmlinkage void ret_from_fork(void) asm("ret_from_fork");
 
 int copy_thread(unsigned long clone_flags, unsigned long stack_start,
-		unsigned long stk_sz, struct task_struct *p,
-		struct pt_regs *unused)
+		unsigned long stk_sz, struct task_struct *p)
 {
 	struct pt_regs *childregs = task_pt_regs(p);
 	unsigned long tls = p->thread.tp_value;

diff --git a/arch/avr32/kernel/process.c b/arch/avr32/kernel/process.c
index 03d7aa4..fd78f58 100644
--- a/arch/avr32/kernel/process.c
+++ b/arch/avr32/kernel/process.c

@@ -299,7 +299,7 @@
 
 int copy_thread(unsigned long clone_flags, unsigned long usp,
 		unsigned long arg,
-		struct task_struct *p, struct pt_regs *unused)
+		struct task_struct *p)
 {
 	struct pt_regs *childregs = task_pt_regs(p);
 

diff --git a/arch/blackfin/kernel/process.c b/arch/blackfin/kernel/process.c
index e5ae8fc..582276e 100644
--- a/arch/blackfin/kernel/process.c
+++ b/arch/blackfin/kernel/process.c

@@ -141,14 +141,14 @@
 int
 copy_thread(unsigned long clone_flags,
 	    unsigned long usp, unsigned long topstk,
-	    struct task_struct *p, struct pt_regs *regs)
+	    struct task_struct *p)
 {
 	struct pt_regs *childregs;
 	unsigned long *v;
 
 	childregs = (struct pt_regs *) (task_stack_page(p) + THREAD_SIZE) - 1;
 	v = ((unsigned long *)childregs) - 2;
-	if (unlikely(!regs)) {
+	if (unlikely(p->flags & PF_KTHREAD)) {
 		memset(childregs, 0, sizeof(struct pt_regs));
 		v[0] = usp;
 		v[1] = topstk;
@@ -157,7 +157,7 @@
 		__asm__ __volatile__("%0 = syscfg;":"=da"(childregs->syscfg):);
 		p->thread.usp = 0;
 	} else {
-		*childregs = *regs;
+		*childregs = *current_pt_regs();
 		childregs->r0 = 0;
 		p->thread.usp = usp ? : rdusp();
 		v[0] = v[1] = 0;

diff --git a/arch/c6x/kernel/process.c b/arch/c6x/kernel/process.c
index a3f9189..6434df4 100644
--- a/arch/c6x/kernel/process.c
+++ b/arch/c6x/kernel/process.c

@@ -139,7 +139,7 @@
  */
 int copy_thread(unsigned long clone_flags, unsigned long usp,
 		unsigned long ustk_size,
-		struct task_struct *p, struct pt_regs *unused)
+		struct task_struct *p)
 {
 	struct pt_regs *childregs;
 

diff --git a/arch/cris/arch-v10/kernel/process.c b/arch/cris/arch-v10/kernel/process.c
index 520547c..b101875 100644
--- a/arch/cris/arch-v10/kernel/process.c
+++ b/arch/cris/arch-v10/kernel/process.c

@@ -94,8 +94,7 @@
 asmlinkage void ret_from_kernel_thread(void);
 
 int copy_thread(unsigned long clone_flags, unsigned long usp,
-		unsigned long arg,
-		struct task_struct *p, struct pt_regs *unused)
+		unsigned long arg, struct task_struct *p)
 {
 	struct pt_regs *childregs = task_pt_regs(p);
 	struct switch_stack *swstack = ((struct switch_stack *)childregs) - 1;

diff --git a/arch/cris/arch-v32/kernel/process.c b/arch/cris/arch-v32/kernel/process.c
index 331e702..2b23ef0 100644
--- a/arch/cris/arch-v32/kernel/process.c
+++ b/arch/cris/arch-v32/kernel/process.c

@@ -109,8 +109,7 @@
 
 int
 copy_thread(unsigned long clone_flags, unsigned long usp,
-	unsigned long arg,
-	struct task_struct *p, struct pt_regs *unused)
+	unsigned long arg, struct task_struct *p)
 {
 	struct pt_regs *childregs = task_pt_regs(p);
 	struct switch_stack *swstack = ((struct switch_stack *) childregs) - 1;

diff --git a/arch/frv/kernel/process.c b/arch/frv/kernel/process.c
index 0039bf7..23916b2 100644
--- a/arch/frv/kernel/process.c
+++ b/arch/frv/kernel/process.c

@@ -144,7 +144,7 @@
  */
 int copy_thread(unsigned long clone_flags,
 		unsigned long usp, unsigned long arg,
-		struct task_struct *p, struct pt_regs *unused)
+		struct task_struct *p)
 {
 	struct pt_regs *childregs;
 

diff --git a/arch/h8300/kernel/process.c b/arch/h8300/kernel/process.c
index b0fb405..b609f63 100644
--- a/arch/h8300/kernel/process.c
+++ b/arch/h8300/kernel/process.c

@@ -129,7 +129,7 @@
 
 int copy_thread(unsigned long clone_flags,
                 unsigned long usp, unsigned long topstk,
-		 struct task_struct * p, struct pt_regs *unused)
+		 struct task_struct * p)
 {
 	struct pt_regs * childregs;
 

diff --git a/arch/hexagon/kernel/process.c b/arch/hexagon/kernel/process.c
index 36dce17..06ae9ff 100644
--- a/arch/hexagon/kernel/process.c
+++ b/arch/hexagon/kernel/process.c

@@ -87,8 +87,7 @@
  * Copy architecture-specific thread state
  */
 int copy_thread(unsigned long clone_flags, unsigned long usp,
-		unsigned long arg, struct task_struct *p,
-		struct pt_regs *unused)
+		unsigned long arg, struct task_struct *p)
 {
 	struct thread_info *ti = task_thread_info(p);
 	struct hexagon_switch_stack *ss;

diff --git a/arch/ia64/kernel/process.c b/arch/ia64/kernel/process.c
index 25543a2..31360cb 100644
--- a/arch/ia64/kernel/process.c
+++ b/arch/ia64/kernel/process.c

@@ -393,12 +393,13 @@
 int
 copy_thread(unsigned long clone_flags,
 	     unsigned long user_stack_base, unsigned long user_stack_size,
-	     struct task_struct *p, struct pt_regs *regs)
+	     struct task_struct *p)
 {
 	extern char ia64_ret_from_clone;
 	struct switch_stack *child_stack, *stack;
 	unsigned long rbs, child_rbs, rbs_size;
 	struct pt_regs *child_ptregs;
+	struct pt_regs *regs = current_pt_regs();
 	int retval = 0;
 
 	child_ptregs = (struct pt_regs *) ((unsigned long) p + IA64_STK_OFFSET) - 1;

diff --git a/arch/m32r/kernel/process.c b/arch/m32r/kernel/process.c
index c37e9a9..765d0f5 100644
--- a/arch/m32r/kernel/process.c
+++ b/arch/m32r/kernel/process.c

@@ -192,7 +192,7 @@
 }
 
 int copy_thread(unsigned long clone_flags, unsigned long spu,
-	unsigned long arg, struct task_struct *tsk, struct pt_regs *unused)
+	unsigned long arg, struct task_struct *tsk)
 {
 	struct pt_regs *childregs = task_pt_regs(tsk);
 	extern void ret_from_fork(void);

diff --git a/arch/m68k/kernel/process.c b/arch/m68k/kernel/process.c
index aa9b110..9a3df4d 100644
--- a/arch/m68k/kernel/process.c
+++ b/arch/m68k/kernel/process.c

@@ -154,8 +154,7 @@
 }
 
 int copy_thread(unsigned long clone_flags, unsigned long usp,
-		 unsigned long arg,
-		 struct task_struct * p, struct pt_regs * unused)
+		 unsigned long arg, struct task_struct *p)
 {
 	struct fork_frame {
 		struct switch_stack sw;

diff --git a/arch/microblaze/kernel/process.c b/arch/microblaze/kernel/process.c
index a5fed8d..40823fd 100644
--- a/arch/microblaze/kernel/process.c
+++ b/arch/microblaze/kernel/process.c

@@ -120,8 +120,7 @@
 }
 
 int copy_thread(unsigned long clone_flags, unsigned long usp,
-		unsigned long arg,
-		struct task_struct *p, struct pt_regs *unused)
+		unsigned long arg, struct task_struct *p)
 {
 	struct pt_regs *childregs = task_pt_regs(p);
 	struct thread_info *ti = task_thread_info(p);

diff --git a/arch/mips/kernel/process.c b/arch/mips/kernel/process.c
index d13720a..38097652 100644
--- a/arch/mips/kernel/process.c
+++ b/arch/mips/kernel/process.c

@@ -114,10 +114,10 @@
 }
 
 int copy_thread(unsigned long clone_flags, unsigned long usp,
-	unsigned long arg, struct task_struct *p, struct pt_regs *regs)
+	unsigned long arg, struct task_struct *p)
 {
 	struct thread_info *ti = task_thread_info(p);
-	struct pt_regs *childregs;
+	struct pt_regs *childregs, *regs = current_pt_regs();
 	unsigned long childksp;
 	p->set_child_tid = p->clear_child_tid = NULL;
 

diff --git a/arch/mn10300/kernel/process.c b/arch/mn10300/kernel/process.c
index 5e0ef39..eb09f5a 100644
--- a/arch/mn10300/kernel/process.c
+++ b/arch/mn10300/kernel/process.c

@@ -206,7 +206,7 @@
  */
 int copy_thread(unsigned long clone_flags,
 		unsigned long c_usp, unsigned long ustk_size,
-		struct task_struct *p, struct pt_regs *unused)
+		struct task_struct *p)
 {
 	struct thread_info *ti = task_thread_info(p);
 	struct pt_regs *c_regs;

diff --git a/arch/openrisc/kernel/process.c b/arch/openrisc/kernel/process.c
index 6b85366..00c233b 100644
--- a/arch/openrisc/kernel/process.c
+++ b/arch/openrisc/kernel/process.c

@@ -142,7 +142,7 @@
 
 int
 copy_thread(unsigned long clone_flags, unsigned long usp,
-	    unsigned long arg, struct task_struct *p, struct pt_regs *regs)
+	    unsigned long arg, struct task_struct *p)
 {
 	struct pt_regs *userregs;
 	struct pt_regs *kregs;

diff --git a/arch/parisc/kernel/process.c b/arch/parisc/kernel/process.c
index 9753ecf..d135072 100644
--- a/arch/parisc/kernel/process.c
+++ b/arch/parisc/kernel/process.c

@@ -204,10 +204,9 @@
 
 int
 copy_thread(unsigned long clone_flags, unsigned long usp,
-	    unsigned long arg,
-	    struct task_struct *p, struct pt_regs *unused)
+	    unsigned long arg, struct task_struct *p)
 {
-	struct pt_regs * cregs = &(p->thread.regs);
+	struct pt_regs *cregs = &(p->thread.regs);
 	void *stack = task_stack_page(p);
 	
 	/* We have to use void * instead of a function pointer, because

diff --git a/arch/powerpc/kernel/process.c b/arch/powerpc/kernel/process.c
index a314375..8143067 100644
--- a/arch/powerpc/kernel/process.c
+++ b/arch/powerpc/kernel/process.c

@@ -733,8 +733,7 @@
 extern unsigned long dscr_default; /* defined in arch/powerpc/kernel/sysfs.c */
 
 int copy_thread(unsigned long clone_flags, unsigned long usp,
-		unsigned long arg, struct task_struct *p,
-		struct pt_regs *regs)
+		unsigned long arg, struct task_struct *p)
 {
 	struct pt_regs *childregs, *kregs;
 	extern void ret_from_fork(void);
@@ -759,6 +758,7 @@
 		ti->flags |= _TIF_RESTOREALL;
 		f = ret_from_kernel_thread;
 	} else {
+		struct pt_regs *regs = current_pt_regs();
 		CHECK_FULL_REGS(regs);
 		*childregs = *regs;
 		if (usp)

diff --git a/arch/s390/kernel/process.c b/arch/s390/kernel/process.c
index e376777..536d645 100644
--- a/arch/s390/kernel/process.c
+++ b/arch/s390/kernel/process.c

@@ -117,8 +117,7 @@
 }
 
 int copy_thread(unsigned long clone_flags, unsigned long new_stackp,
-		unsigned long arg,
-		struct task_struct *p, struct pt_regs *unused)
+		unsigned long arg, struct task_struct *p)
 {
 	struct thread_info *ti;
 	struct fake_frame

diff --git a/arch/score/kernel/process.c b/arch/score/kernel/process.c
index f96379a..7956846 100644
--- a/arch/score/kernel/process.c
+++ b/arch/score/kernel/process.c

@@ -87,11 +87,11 @@
  * set up the kernel stack and exception frames for a new process
  */
 int copy_thread(unsigned long clone_flags, unsigned long usp,
-		unsigned long arg,
-		struct task_struct *p, struct pt_regs *regs)
+		unsigned long arg, struct task_struct *p)
 {
 	struct thread_info *ti = task_thread_info(p);
 	struct pt_regs *childregs = task_pt_regs(p);
+	struct pt_regs *regs = current_pt_regs();
 
 	p->thread.reg0 = (unsigned long) childregs;
 	if (unlikely(p->flags & PF_KTHREAD)) {

diff --git a/arch/sh/kernel/process_32.c b/arch/sh/kernel/process_32.c
index 1786d16..73eb66f 100644
--- a/arch/sh/kernel/process_32.c
+++ b/arch/sh/kernel/process_32.c

@@ -128,8 +128,7 @@
 asmlinkage void ret_from_kernel_thread(void);
 
 int copy_thread(unsigned long clone_flags, unsigned long usp,
-		unsigned long arg,
-		struct task_struct *p, struct pt_regs *unused)
+		unsigned long arg, struct task_struct *p)
 {
 	struct thread_info *ti = task_thread_info(p);
 	struct pt_regs *childregs;

diff --git a/arch/sh/kernel/process_64.c b/arch/sh/kernel/process_64.c
index d5c86a8..e611c85 100644
--- a/arch/sh/kernel/process_64.c
+++ b/arch/sh/kernel/process_64.c

@@ -371,10 +371,9 @@
 asmlinkage void ret_from_kernel_thread(void);
 
 int copy_thread(unsigned long clone_flags, unsigned long usp,
-		unsigned long arg,
-		struct task_struct *p, struct pt_regs *regs)
+		unsigned long arg, struct task_struct *p)
 {
-	struct pt_regs *childregs;
+	struct pt_regs *childregs, *regs = current_pt_regs();
 
 #ifdef CONFIG_SH_FPU
 	/* can't happen for a kernel thread */

diff --git a/arch/sparc/kernel/process_32.c b/arch/sparc/kernel/process_32.c
index bf4c6ad..ecde946 100644
--- a/arch/sparc/kernel/process_32.c
+++ b/arch/sparc/kernel/process_32.c

@@ -319,11 +319,10 @@
 extern void ret_from_kernel_thread(void);
 
 int copy_thread(unsigned long clone_flags, unsigned long sp,
-		unsigned long arg,
-		struct task_struct *p, struct pt_regs *regs)
+		unsigned long arg, struct task_struct *p)
 {
 	struct thread_info *ti = task_thread_info(p);
-	struct pt_regs *childregs;
+	struct pt_regs *childregs, *regs = current_pt_regs();
 	char *new_stack;
 
 #ifndef CONFIG_SMP

diff --git a/arch/sparc/kernel/process_64.c b/arch/sparc/kernel/process_64.c
index dff54f4..58ef19e 100644
--- a/arch/sparc/kernel/process_64.c
+++ b/arch/sparc/kernel/process_64.c

@@ -622,10 +622,10 @@
  * Child  -->  %o0 == parents pid, %o1 == 1
  */
 int copy_thread(unsigned long clone_flags, unsigned long sp,
-		unsigned long arg,
-		struct task_struct *p, struct pt_regs *regs)
+		unsigned long arg, struct task_struct *p)
 {
 	struct thread_info *t = task_thread_info(p);
+	struct pt_regs *regs = current_pt_regs();
 	struct sparc_stackf *parent_sf;
 	unsigned long child_stack_sz;
 	char *child_trap_frame;

diff --git a/arch/tile/kernel/process.c b/arch/tile/kernel/process.c
index 267936b..0e5661e 100644
--- a/arch/tile/kernel/process.c
+++ b/arch/tile/kernel/process.c

@@ -157,10 +157,9 @@
 static void save_arch_state(struct thread_struct *t);
 
 int copy_thread(unsigned long clone_flags, unsigned long sp,
-		unsigned long arg,
-		struct task_struct *p, struct pt_regs *unused)
+		unsigned long arg, struct task_struct *p)
 {
-	struct pt_regs *childregs = task_pt_regs(p);
+	struct pt_regs *childregs = task_pt_regs(p), *regs = current_pt_regs();
 	unsigned long ksp;
 	unsigned long *callee_regs;
 

diff --git a/arch/um/kernel/process.c b/arch/um/kernel/process.c
index c502c80..b462b13 100644
--- a/arch/um/kernel/process.c
+++ b/arch/um/kernel/process.c

@@ -161,8 +161,7 @@
 }
 
 int copy_thread(unsigned long clone_flags, unsigned long sp,
-		unsigned long arg, struct task_struct * p,
-		struct pt_regs *regs)
+		unsigned long arg, struct task_struct * p)
 {
 	void (*handler)(void);
 	int kthread = current->flags & PF_KTHREAD;

diff --git a/arch/unicore32/kernel/process.c b/arch/unicore32/kernel/process.c
index 79e44e8..62bad9f 100644
--- a/arch/unicore32/kernel/process.c
+++ b/arch/unicore32/kernel/process.c

@@ -262,7 +262,7 @@
 
 int
 copy_thread(unsigned long clone_flags, unsigned long stack_start,
-	    unsigned long stk_sz, struct task_struct *p, struct pt_regs *unused)
+	    unsigned long stk_sz, struct task_struct *p)
 {
 	struct thread_info *thread = task_thread_info(p);
 	struct pt_regs *childregs = task_pt_regs(p);

diff --git a/arch/x86/kernel/process_32.c b/arch/x86/kernel/process_32.c
index 16efa97..b5a8905 100644
--- a/arch/x86/kernel/process_32.c
+++ b/arch/x86/kernel/process_32.c

@@ -128,8 +128,7 @@
 }
 
 int copy_thread(unsigned long clone_flags, unsigned long sp,
-	unsigned long arg,
-	struct task_struct *p, struct pt_regs *unused)
+	unsigned long arg, struct task_struct *p)
 {
 	struct pt_regs *childregs = task_pt_regs(p);
 	struct task_struct *tsk;

diff --git a/arch/x86/kernel/process_64.c b/arch/x86/kernel/process_64.c
index 74aac76..6e68a61 100644
--- a/arch/x86/kernel/process_64.c
+++ b/arch/x86/kernel/process_64.c

@@ -146,8 +146,7 @@
 }
 
 int copy_thread(unsigned long clone_flags, unsigned long sp,
-		unsigned long arg,
-	struct task_struct *p, struct pt_regs *regs)
+		unsigned long arg, struct task_struct *p)
 {
 	int err;
 	struct pt_regs *childregs;

diff --git a/arch/xtensa/kernel/process.c b/arch/xtensa/kernel/process.c
index 0036c14..1accf28 100644
--- a/arch/xtensa/kernel/process.c
+++ b/arch/xtensa/kernel/process.c

@@ -199,8 +199,7 @@
  */
 
 int copy_thread(unsigned long clone_flags, unsigned long usp_thread_fn,
-		unsigned long thread_fn_arg,
-		struct task_struct *p, struct pt_regs *unused)
+		unsigned long thread_fn_arg, struct task_struct *p)
 {
 	struct pt_regs *childregs = task_pt_regs(p);
commit	afa86fc426ff7e7f5477f15da9c405d08d5cf790	[log] [tgz]
author	Al Viro <viro@zeniv.linux.org.uk>	Mon Oct 22 22:51:14 2012 -0400
committer	Al Viro <viro@zeniv.linux.org.uk>	Wed Nov 28 23:43:42 2012 -0500
tree	0f82925269757902ce6f7c287a968f7b439d2b2d
parent	135c37b83c81b79a888108e3f7c5f64423d8a851 [diff]