diff options
41 files changed, 63 insertions, 149 deletions
diff --git a/arch/alpha/include/asm/processor.h b/arch/alpha/include/asm/processor.h index 94afe58..e37b887 100644 --- a/arch/alpha/include/asm/processor.h +++ b/arch/alpha/include/asm/processor.h @@ -49,9 +49,6 @@ extern void start_thread(struct pt_regs *, unsigned long, unsigned long); /* Free all resources held by a thread. */ extern void release_thread(struct task_struct *); -/* Prepare to copy thread state - unlazy all lazy status */ -#define prepare_to_copy(tsk) do { } while (0) - /* Create a kernel thread without removing it from tasklists. */ extern long kernel_thread(int (*fn)(void *), void *arg, unsigned long flags); diff --git a/arch/arm/include/asm/processor.h b/arch/arm/include/asm/processor.h index d7038fa..99afa74 100644 --- a/arch/arm/include/asm/processor.h +++ b/arch/arm/include/asm/processor.h @@ -77,9 +77,6 @@ struct task_struct; /* Free all resources held by a thread. */ extern void release_thread(struct task_struct *); -/* Prepare to copy thread state - unlazy all lazy status */ -#define prepare_to_copy(tsk) do { } while (0) - unsigned long get_wchan(struct task_struct *p); #if __LINUX_ARM_ARCH__ == 6 || defined(CONFIG_ARM_ERRATA_754327) diff --git a/arch/avr32/include/asm/processor.h b/arch/avr32/include/asm/processor.h index 108502b..87d8bac 100644 --- a/arch/avr32/include/asm/processor.h +++ b/arch/avr32/include/asm/processor.h @@ -145,9 +145,6 @@ extern void release_thread(struct task_struct *); /* Create a kernel thread without removing it from tasklists */ extern int kernel_thread(int (*fn)(void *), void *arg, unsigned long flags); -/* Prepare to copy thread state - unlazy all lazy status */ -#define prepare_to_copy(tsk) do { } while(0) - /* Return saved PC of a blocked thread */ #define thread_saved_pc(tsk) ((tsk)->thread.cpu_context.pc) diff --git a/arch/blackfin/include/asm/processor.h b/arch/blackfin/include/asm/processor.h index 8af7772..4ef7cfe 100644 --- a/arch/blackfin/include/asm/processor.h +++ b/arch/blackfin/include/asm/processor.h @@ -75,8 +75,6 @@ static inline void release_thread(struct task_struct *dead_task) { } -#define prepare_to_copy(tsk) do { } while (0) - extern int kernel_thread(int (*fn) (void *), void *arg, unsigned long flags); /* diff --git a/arch/c6x/include/asm/processor.h b/arch/c6x/include/asm/processor.h index 3ff7fab..c50af7e 100644 --- a/arch/c6x/include/asm/processor.h +++ b/arch/c6x/include/asm/processor.h @@ -92,9 +92,6 @@ static inline void release_thread(struct task_struct *dead_task) { } -/* Prepare to copy thread state - unlazy all lazy status */ -#define prepare_to_copy(tsk) do { } while (0) - extern int kernel_thread(int (*fn)(void *), void * arg, unsigned long flags); #define copy_segments(tsk, mm) do { } while (0) diff --git a/arch/cris/include/asm/processor.h b/arch/cris/include/asm/processor.h index 8dc56ef..ef4e1bc 100644 --- a/arch/cris/include/asm/processor.h +++ b/arch/cris/include/asm/processor.h @@ -49,10 +49,6 @@ struct task_struct; #define task_pt_regs(task) user_regs(task_thread_info(task)) #define current_regs() task_pt_regs(current) -static inline void prepare_to_copy(struct task_struct *tsk) -{ -} - extern int kernel_thread(int (*fn)(void *), void * arg, unsigned long flags); unsigned long get_wchan(struct task_struct *p); diff --git a/arch/frv/include/asm/processor.h b/arch/frv/include/asm/processor.h index 9b1a92b..a8311d3 100644 --- a/arch/frv/include/asm/processor.h +++ b/arch/frv/include/asm/processor.h @@ -103,8 +103,6 @@ do { \ __frame->sp = (_usp); \ } while(0) -extern void prepare_to_copy(struct task_struct *tsk); - /* Free all resources held by a thread. */ static inline void release_thread(struct task_struct *dead_task) { diff --git a/arch/frv/kernel/process.c b/arch/frv/kernel/process.c index ed09e9e..ff95f50 100644 --- a/arch/frv/kernel/process.c +++ b/arch/frv/kernel/process.c @@ -165,17 +165,6 @@ asmlinkage int sys_clone(unsigned long clone_flags, unsigned long newsp, return do_fork(clone_flags, newsp, __frame, 0, parent_tidptr, child_tidptr); } /* end sys_clone() */ -/*****************************************************************************/ -/* - * This gets called before we allocate a new thread and copy - * the current task into it. - */ -void prepare_to_copy(struct task_struct *tsk) -{ - //unlazy_fpu(tsk); -} /* end prepare_to_copy() */ - -/*****************************************************************************/ /* * set up the kernel stack and exception frames for a new process */ diff --git a/arch/h8300/include/asm/processor.h b/arch/h8300/include/asm/processor.h index 61fabf1..4c9f6f8 100644 --- a/arch/h8300/include/asm/processor.h +++ b/arch/h8300/include/asm/processor.h @@ -109,8 +109,6 @@ static inline void release_thread(struct task_struct *dead_task) extern int kernel_thread(int (*fn)(void *), void * arg, unsigned long flags); -#define prepare_to_copy(tsk) do { } while (0) - /* * Free current thread data structures etc.. */ diff --git a/arch/hexagon/include/asm/processor.h b/arch/hexagon/include/asm/processor.h index 20c5dda..e8ea459 100644 --- a/arch/hexagon/include/asm/processor.h +++ b/arch/hexagon/include/asm/processor.h @@ -59,13 +59,6 @@ struct thread_struct { #define cpu_relax() __vmyield() /* - * "Unlazying all lazy status" occurs here. - */ -static inline void prepare_to_copy(struct task_struct *tsk) -{ -} - -/* * Decides where the kernel will search for a free chunk of vm space during * mmaps. * See also arch_get_unmapped_area. diff --git a/arch/ia64/include/asm/processor.h b/arch/ia64/include/asm/processor.h index f92f67a..5a994ec 100644 --- a/arch/ia64/include/asm/processor.h +++ b/arch/ia64/include/asm/processor.h @@ -343,9 +343,6 @@ struct task_struct; */ #define release_thread(dead_task) -/* Prepare to copy thread state - unlazy all lazy status */ -#define prepare_to_copy(tsk) do { } while (0) - /* * This is the mechanism for creating a new kernel thread. * diff --git a/arch/m32r/include/asm/processor.h b/arch/m32r/include/asm/processor.h index e1f46d7..da17253 100644 --- a/arch/m32r/include/asm/processor.h +++ b/arch/m32r/include/asm/processor.h @@ -118,8 +118,6 @@ struct mm_struct; /* Free all resources held by a thread. */ extern void release_thread(struct task_struct *); -#define prepare_to_copy(tsk) do { } while (0) - /* * create a kernel thread without removing it from tasklists */ diff --git a/arch/m68k/include/asm/processor.h b/arch/m68k/include/asm/processor.h index 46460fa..f17c42a 100644 --- a/arch/m68k/include/asm/processor.h +++ b/arch/m68k/include/asm/processor.h @@ -153,9 +153,6 @@ static inline void release_thread(struct task_struct *dead_task) { } -/* Prepare to copy thread state - unlazy all lazy status */ -#define prepare_to_copy(tsk) do { } while (0) - extern int kernel_thread(int (*fn)(void *), void * arg, unsigned long flags); /* diff --git a/arch/microblaze/include/asm/processor.h b/arch/microblaze/include/asm/processor.h index bffb545..af2bb96 100644 --- a/arch/microblaze/include/asm/processor.h +++ b/arch/microblaze/include/asm/processor.h @@ -23,7 +23,6 @@ extern const struct seq_operations cpuinfo_op; # define cpu_relax() barrier() # define cpu_sleep() do {} while (0) -# define prepare_to_copy(tsk) do {} while (0) #define task_pt_regs(tsk) \ (((struct pt_regs *)(THREAD_SIZE + task_stack_page(tsk))) - 1) diff --git a/arch/mips/include/asm/processor.h b/arch/mips/include/asm/processor.h index 20e9dcf..5e33fab 100644 --- a/arch/mips/include/asm/processor.h +++ b/arch/mips/include/asm/processor.h @@ -310,9 +310,6 @@ struct task_struct; /* Free all resources held by a thread. */ #define release_thread(thread) do { } while(0) -/* Prepare to copy thread state - unlazy all lazy status */ -#define prepare_to_copy(tsk) do { } while (0) - extern long kernel_thread(int (*fn)(void *), void * arg, unsigned long flags); extern unsigned long thread_saved_pc(struct task_struct *tsk); diff --git a/arch/mn10300/include/asm/processor.h b/arch/mn10300/include/asm/processor.h index f7b3c9a..247928c 100644 --- a/arch/mn10300/include/asm/processor.h +++ b/arch/mn10300/include/asm/processor.h @@ -139,9 +139,6 @@ static inline void start_thread(struct pt_regs *regs, /* Free all resources held by a thread. */ extern void release_thread(struct task_struct *); -/* Prepare to copy thread state - unlazy all lazy status */ -extern void prepare_to_copy(struct task_struct *tsk); - /* * create a kernel thread without removing it from tasklists */ diff --git a/arch/mn10300/kernel/process.c b/arch/mn10300/kernel/process.c index 14707f2..7dab0cd 100644 --- a/arch/mn10300/kernel/process.c +++ b/arch/mn10300/kernel/process.c @@ -208,12 +208,14 @@ void copy_segments(struct task_struct *p, struct mm_struct *new_mm) } /* - * this gets called before we allocate a new thread and copy the current task - * into it so that we can store lazy state into memory + * this gets called so that we can store lazy state into memory and copy the + * current task into the new thread. */ -void prepare_to_copy(struct task_struct *tsk) +int arch_dup_task_struct(struct task_struct *dst, struct task_struct *src) { - unlazy_fpu(tsk); + unlazy_fpu(src); + *dst = *src; + return 0; } /* diff --git a/arch/openrisc/include/asm/processor.h b/arch/openrisc/include/asm/processor.h index f7516fa..30462f1 100644 --- a/arch/openrisc/include/asm/processor.h +++ b/arch/openrisc/include/asm/processor.h @@ -72,10 +72,6 @@ struct thread_struct { #define task_pt_regs(task) user_regs(task_thread_info(task)) #define current_regs() user_regs(current_thread_info()) -extern inline void prepare_to_copy(struct task_struct *tsk) -{ -} - #define INIT_SP (sizeof(init_stack) + (unsigned long) &init_stack) #define INIT_THREAD { } diff --git a/arch/parisc/include/asm/processor.h b/arch/parisc/include/asm/processor.h index acdf4ca..0e8b7b8 100644 --- a/arch/parisc/include/asm/processor.h +++ b/arch/parisc/include/asm/processor.h @@ -328,9 +328,6 @@ struct mm_struct; extern void release_thread(struct task_struct *); extern int kernel_thread(int (*fn)(void *), void * arg, unsigned long flags); -/* Prepare to copy thread state - unlazy all lazy status */ -#define prepare_to_copy(tsk) do { } while (0) - extern void map_hpux_gateway_page(struct task_struct *tsk, struct mm_struct *mm); extern unsigned long get_wchan(struct task_struct *p); diff --git a/arch/powerpc/include/asm/processor.h b/arch/powerpc/include/asm/processor.h index 48a26d379..55e8563 100644 --- a/arch/powerpc/include/asm/processor.h +++ b/arch/powerpc/include/asm/processor.h @@ -74,9 +74,6 @@ struct task_struct; void start_thread(struct pt_regs *regs, unsigned long fdptr, unsigned long sp); void release_thread(struct task_struct *); -/* Prepare to copy thread state - unlazy all lazy status */ -extern void prepare_to_copy(struct task_struct *tsk); - /* Create a new kernel thread. */ extern long kernel_thread(int (*fn)(void *), void *arg, unsigned long flags); diff --git a/arch/powerpc/kernel/process.c b/arch/powerpc/kernel/process.c index 7f8ec1d..710f400 100644 --- a/arch/powerpc/kernel/process.c +++ b/arch/powerpc/kernel/process.c @@ -711,18 +711,21 @@ release_thread(struct task_struct *t) } /* - * This gets called before we allocate a new thread and copy - * the current task into it. + * this gets called so that we can store coprocessor state into memory and + * copy the current task into the new thread. */ -void prepare_to_copy(struct task_struct *tsk) +int arch_dup_task_struct(struct task_struct *dst, struct task_struct *src) { - flush_fp_to_thread(current); - flush_altivec_to_thread(current); - flush_vsx_to_thread(current); - flush_spe_to_thread(current); + flush_fp_to_thread(src); + flush_altivec_to_thread(src); + flush_vsx_to_thread(src); + flush_spe_to_thread(src); #ifdef CONFIG_HAVE_HW_BREAKPOINT - flush_ptrace_hw_breakpoint(tsk); + flush_ptrace_hw_breakpoint(src); #endif /* CONFIG_HAVE_HW_BREAKPOINT */ + + *dst = *src; + return 0; } /* diff --git a/arch/s390/include/asm/processor.h b/arch/s390/include/asm/processor.h index d499b30..6cbf313 100644 --- a/arch/s390/include/asm/processor.h +++ b/arch/s390/include/asm/processor.h @@ -141,9 +141,6 @@ struct seq_file; extern void release_thread(struct task_struct *); extern int kernel_thread(int (*fn)(void *), void * arg, unsigned long flags); -/* Prepare to copy thread state - unlazy all lazy status */ -#define prepare_to_copy(tsk) do { } while (0) - /* * Return saved PC of a blocked thread. */ diff --git a/arch/score/include/asm/processor.h b/arch/score/include/asm/processor.h index 7e22f21..ab3aceb 100644 --- a/arch/score/include/asm/processor.h +++ b/arch/score/include/asm/processor.h @@ -26,7 +26,6 @@ extern unsigned long get_wchan(struct task_struct *p); #define cpu_relax() barrier() #define release_thread(thread) do {} while (0) -#define prepare_to_copy(tsk) do {} while (0) /* * User space process size: 2GB. This is hardcoded into a few places, diff --git a/arch/sh/include/asm/processor_32.h b/arch/sh/include/asm/processor_32.h index 900f8d7..b6311fd 100644 --- a/arch/sh/include/asm/processor_32.h +++ b/arch/sh/include/asm/processor_32.h @@ -126,9 +126,6 @@ extern void start_thread(struct pt_regs *regs, unsigned long new_pc, unsigned lo /* Free all resources held by a thread. */ extern void release_thread(struct task_struct *); -/* Prepare to copy thread state - unlazy all lazy status */ -void prepare_to_copy(struct task_struct *tsk); - /* * create a kernel thread without removing it from tasklists */ diff --git a/arch/sh/include/asm/processor_64.h b/arch/sh/include/asm/processor_64.h index 740e268..cd6029f 100644 --- a/arch/sh/include/asm/processor_64.h +++ b/arch/sh/include/asm/processor_64.h @@ -169,7 +169,6 @@ extern int kernel_thread(int (*fn)(void *), void * arg, unsigned long flags); #define copy_segments(p, mm) do { } while (0) #define release_segments(mm) do { } while (0) #define forget_segments() do { } while (0) -#define prepare_to_copy(tsk) do { } while (0) /* * FPU lazy state save handling. */ diff --git a/arch/sh/kernel/process.c b/arch/sh/kernel/process.c index e77feaf..9b7a459 100644 --- a/arch/sh/kernel/process.c +++ b/arch/sh/kernel/process.c @@ -13,8 +13,15 @@ unsigned long __stack_chk_guard __read_mostly; EXPORT_SYMBOL(__stack_chk_guard); #endif +/* + * this gets called so that we can store lazy state into memory and copy the + * current task into the new thread. + */ int arch_dup_task_struct(struct task_struct *dst, struct task_struct *src) { +#ifdef CONFIG_SUPERH32 + unlazy_fpu(src, task_pt_regs(src)); +#endif *dst = *src; if (src->thread.xstate) { diff --git a/arch/sh/kernel/process_32.c b/arch/sh/kernel/process_32.c index f78cc42..59521e8 100644 --- a/arch/sh/kernel/process_32.c +++ b/arch/sh/kernel/process_32.c @@ -156,15 +156,6 @@ int dump_fpu(struct pt_regs *regs, elf_fpregset_t *fpu) } EXPORT_SYMBOL(dump_fpu); -/* - * This gets called before we allocate a new thread and copy - * the current task into it. - */ -void prepare_to_copy(struct task_struct *tsk) -{ - unlazy_fpu(tsk, task_pt_regs(tsk)); -} - asmlinkage void ret_from_fork(void); int copy_thread(unsigned long clone_flags, unsigned long usp, diff --git a/arch/sparc/include/asm/processor_32.h b/arch/sparc/include/asm/processor_32.h index 9cbd854..f74ac9e 100644 --- a/arch/sparc/include/asm/processor_32.h +++ b/arch/sparc/include/asm/processor_32.h @@ -108,9 +108,6 @@ static inline void start_thread(struct pt_regs * regs, unsigned long pc, #define release_thread(tsk) do { } while(0) extern pid_t kernel_thread(int (*fn)(void *), void * arg, unsigned long flags); -/* Prepare to copy thread state - unlazy all lazy status */ -#define prepare_to_copy(tsk) do { } while (0) - extern unsigned long get_wchan(struct task_struct *); #define task_pt_regs(tsk) ((tsk)->thread.kregs) diff --git a/arch/sparc/include/asm/processor_64.h b/arch/sparc/include/asm/processor_64.h index e713db2..67df5cc 100644 --- a/arch/sparc/include/asm/processor_64.h +++ b/arch/sparc/include/asm/processor_64.h @@ -186,9 +186,6 @@ do { \ /* Free all resources held by a thread. */ #define release_thread(tsk) do { } while (0) -/* Prepare to copy thread state - unlazy all lazy status */ -#define prepare_to_copy(tsk) do { } while (0) - extern pid_t kernel_thread(int (*fn)(void *), void * arg, unsigned long flags); extern unsigned long get_wchan(struct task_struct *task); diff --git a/arch/tile/include/asm/processor.h b/arch/tile/include/asm/processor.h index 34c1e01..15cd8a4 100644 --- a/arch/tile/include/asm/processor.h +++ b/arch/tile/include/asm/processor.h @@ -210,9 +210,6 @@ static inline void release_thread(struct task_struct *dead_task) /* Nothing for now */ } -/* Prepare to copy thread state - unlazy all lazy status. */ -#define prepare_to_copy(tsk) do { } while (0) - extern int kernel_thread(int (*fn)(void *), void *arg, unsigned long flags); extern int do_work_pending(struct pt_regs *regs, u32 flags); diff --git a/arch/um/include/asm/processor-generic.h b/arch/um/include/asm/processor-generic.h index 7827394..69f1c57 100644 --- a/arch/um/include/asm/processor-generic.h +++ b/arch/um/include/asm/processor-generic.h @@ -74,11 +74,6 @@ static inline void release_thread(struct task_struct *task) extern int kernel_thread(int (*fn)(void *), void * arg, unsigned long flags); -static inline void prepare_to_copy(struct task_struct *tsk) -{ -} - - extern unsigned long thread_saved_pc(struct task_struct *t); static inline void mm_copy_segments(struct mm_struct *from_mm, diff --git a/arch/unicore32/include/asm/processor.h b/arch/unicore32/include/asm/processor.h index f0d780a..14382cb 100644 --- a/arch/unicore32/include/asm/processor.h +++ b/arch/unicore32/include/asm/processor.h @@ -68,9 +68,6 @@ struct task_struct; /* Free all resources held by a thread. */ extern void release_thread(struct task_struct *); -/* Prepare to copy thread state - unlazy all lazy status */ -#define prepare_to_copy(tsk) do { } while (0) - unsigned long get_wchan(struct task_struct *p); #define cpu_relax() barrier() diff --git a/arch/x86/include/asm/processor.h b/arch/x86/include/asm/processor.h index ccbb1ea..7745b257 100644 --- a/arch/x86/include/asm/processor.h +++ b/arch/x86/include/asm/processor.h @@ -579,9 +579,6 @@ extern int kernel_thread(int (*fn)(void *), void *arg, unsigned long flags); /* Free all resources held by a thread. */ extern void release_thread(struct task_struct *); -/* Prepare to copy thread state - unlazy all lazy state */ -extern void prepare_to_copy(struct task_struct *tsk); - unsigned long get_wchan(struct task_struct *p); /* diff --git a/arch/x86/kernel/process.c b/arch/x86/kernel/process.c index f2e8c0f..735279e 100644 --- a/arch/x86/kernel/process.c +++ b/arch/x86/kernel/process.c @@ -56,10 +56,16 @@ EXPORT_SYMBOL_GPL(idle_notifier_unregister); struct kmem_cache *task_xstate_cachep; EXPORT_SYMBOL_GPL(task_xstate_cachep); +/* + * this gets called so that we can store lazy state into memory and copy the + * current task into the new thread. + */ int arch_dup_task_struct(struct task_struct *dst, struct task_struct *src) { int ret; + unlazy_fpu(src); + *dst = *src; if (fpu_allocated(&src->thread.fpu)) { memset(&dst->thread.fpu, 0, sizeof(dst->thread.fpu)); @@ -89,6 +95,16 @@ void arch_task_cache_init(void) SLAB_PANIC | SLAB_NOTRACK, NULL); } +static inline void drop_fpu(struct task_struct *tsk) +{ + /* + * Forget coprocessor state.. + */ + tsk->fpu_counter = 0; + clear_fpu(tsk); + clear_used_math(); +} + /* * Free current thread data structures etc.. */ @@ -111,6 +127,8 @@ void exit_thread(void) put_cpu(); kfree(bp); } + + drop_fpu(me); } void show_regs_common(void) @@ -145,12 +163,7 @@ void flush_thread(void) flush_ptrace_hw_breakpoint(tsk); memset(tsk->thread.tls_array, 0, sizeof(tsk->thread.tls_array)); - /* - * Forget coprocessor state.. - */ - tsk->fpu_counter = 0; - clear_fpu(tsk); - clear_used_math(); + drop_fpu(tsk); } static void hard_disable_TSC(void) diff --git a/arch/x86/kernel/process_32.c b/arch/x86/kernel/process_32.c index 01d8d40..516fa18 100644 --- a/arch/x86/kernel/process_32.c +++ b/arch/x86/kernel/process_32.c @@ -126,15 +126,6 @@ void release_thread(struct task_struct *dead_task) release_vm86_irqs(dead_task); } -/* - * This gets called before we allocate a new thread and copy - * the current task into it. - */ -void prepare_to_copy(struct task_struct *tsk) -{ - unlazy_fpu(tsk); -} - int copy_thread(unsigned long clone_flags, unsigned long sp, unsigned long unused, struct task_struct *p, struct pt_regs *regs) diff --git a/arch/x86/kernel/process_64.c b/arch/x86/kernel/process_64.c index 28e8102..61cdf7f 100644 --- a/arch/x86/kernel/process_64.c +++ b/arch/x86/kernel/process_64.c @@ -145,15 +145,6 @@ static inline u32 read_32bit_tls(struct task_struct *t, int tls) return get_desc_base(&t->thread.tls_array[tls]); } -/* - * This gets called before we allocate a new thread and copy - * the current task into it. - */ -void prepare_to_copy(struct task_struct *tsk) -{ - unlazy_fpu(tsk); -} - int copy_thread(unsigned long clone_flags, unsigned long sp, unsigned long unused, struct task_struct *p, struct pt_regs *regs) diff --git a/arch/x86/kernel/xsave.c b/arch/x86/kernel/xsave.c index e62728e..bd18149 100644 --- a/arch/x86/kernel/xsave.c +++ b/arch/x86/kernel/xsave.c @@ -48,8 +48,6 @@ void __sanitize_i387_state(struct task_struct *tsk) if (!fx) return; - BUG_ON(__thread_has_fpu(tsk)); - xstate_bv = tsk->thread.fpu.state->xsave.xsave_hdr.xstate_bv; /* diff --git a/arch/xtensa/include/asm/processor.h b/arch/xtensa/include/asm/processor.h index 3acb26e..5c371d8 100644 --- a/arch/xtensa/include/asm/processor.h +++ b/arch/xtensa/include/asm/processor.h @@ -168,9 +168,6 @@ struct mm_struct; /* Free all resources held by a thread. */ #define release_thread(thread) do { } while(0) -/* Prepare to copy thread state - unlazy all lazy status */ -extern void prepare_to_copy(struct task_struct*); - /* Create a kernel thread without removing it from tasklists */ extern int kernel_thread(int (*fn)(void *), void * arg, unsigned long flags); diff --git a/arch/xtensa/kernel/process.c b/arch/xtensa/kernel/process.c index 6a2d6ed..9b306e5 100644 --- a/arch/xtensa/kernel/process.c +++ b/arch/xtensa/kernel/process.c @@ -140,13 +140,16 @@ void flush_thread(void) } /* - * This is called before the thread is copied. + * this gets called so that we can store coprocessor state into memory and + * copy the current task into the new thread. */ -void prepare_to_copy(struct task_struct *tsk) +int arch_dup_task_struct(struct task_struct *dst, struct task_struct *src) { #if XTENSA_HAVE_COPROCESSORS - coprocessor_flush_all(task_thread_info(tsk)); + coprocessor_flush_all(task_thread_info(src)); #endif + *dst = *src; + return 0; } /* @@ -1938,8 +1938,21 @@ static int coredump_wait(int exit_code, struct core_state *core_state) core_waiters = zap_threads(tsk, mm, core_state, exit_code); up_write(&mm->mmap_sem); - if (core_waiters > 0) + if (core_waiters > 0) { + struct core_thread *ptr; + wait_for_completion(&core_state->startup); + /* + * Wait for all the threads to become inactive, so that + * all the thread context (extended register state, like + * fpu etc) gets copied to the memory. + */ + ptr = core_state->dumper.next; + while (ptr != NULL) { + wait_task_inactive(ptr->task, 0); + ptr = ptr->next; + } + } return core_waiters; } diff --git a/kernel/fork.c b/kernel/fork.c index ad54c83..05c813d 100644 --- a/kernel/fork.c +++ b/kernel/fork.c @@ -292,8 +292,6 @@ static struct task_struct *dup_task_struct(struct task_struct *orig) int node = tsk_fork_get_node(orig); int err; - prepare_to_copy(orig); - tsk = alloc_task_struct_node(node); if (!tsk) return NULL; |
