From 92bbe6cdfdeeaf9ac2a240b1829bab219e7e91d0 Mon Sep 17 00:00:00 2001 From: Al Viro Date: Sun, 21 Oct 2012 16:52:56 -0400 Subject: [PATCH] m32r: switch to generic fork/vfork/clone Signed-off-by: Al Viro --- arch/m32r/include/asm/unistd.h | 3 +++ arch/m32r/kernel/process.c | 46 +++------------------------------- 2 files changed, 7 insertions(+), 42 deletions(-) diff --git a/arch/m32r/include/asm/unistd.h b/arch/m32r/include/asm/unistd.h index b27bdcbc7c2c..d9e7351af2a4 100644 --- a/arch/m32r/include/asm/unistd.h +++ b/arch/m32r/include/asm/unistd.h @@ -353,6 +353,9 @@ #define __ARCH_WANT_SYS_RT_SIGACTION #define __ARCH_WANT_SYS_RT_SIGSUSPEND #define __ARCH_WANT_SYS_EXECVE +#define __ARCH_WANT_SYS_CLONE +#define __ARCH_WANT_SYS_FORK +#define __ARCH_WANT_SYS_VFORK #define __IGNORE_lchown #define __IGNORE_setuid diff --git a/arch/m32r/kernel/process.c b/arch/m32r/kernel/process.c index 62c713f5694a..c37e9a9a8f27 100644 --- a/arch/m32r/kernel/process.c +++ b/arch/m32r/kernel/process.c @@ -192,7 +192,7 @@ int dump_fpu(struct pt_regs *regs, elf_fpregset_t *fpu) } int copy_thread(unsigned long clone_flags, unsigned long spu, - unsigned long arg, struct task_struct *tsk, struct pt_regs *regs) + unsigned long arg, struct task_struct *tsk, struct pt_regs *unused) { struct pt_regs *childregs = task_pt_regs(tsk); extern void ret_from_fork(void); @@ -206,8 +206,9 @@ int copy_thread(unsigned long clone_flags, unsigned long spu, tsk->thread.lr = (unsigned long)ret_from_kernel_thread; } else { /* Copy registers */ - *childregs = *regs; - childregs->spu = spu; + *childregs = *current_pt_regs(); + if (spu) + childregs->spu = spu; childregs->r0 = 0; /* Child gets zero as return value */ tsk->thread.lr = (unsigned long)ret_from_fork; } @@ -216,45 +217,6 @@ int copy_thread(unsigned long clone_flags, unsigned long spu, return 0; } -asmlinkage int sys_fork(void) -{ -#ifdef CONFIG_MMU - struct pt_regs *regs = current_pt_regs(); - return do_fork(SIGCHLD, regs->spu, regs, 0, NULL, NULL); -#else - return -EINVAL; -#endif /* CONFIG_MMU */ -} - -asmlinkage int sys_clone(unsigned long clone_flags, unsigned long newsp, - unsigned long parent_tidptr, - unsigned long child_tidptr) -{ - struct pt_regs *regs = current_pt_regs(); - if (!newsp) - newsp = regs->spu; - - return do_fork(clone_flags, newsp, regs, 0, - (int __user *)parent_tidptr, (int __user *)child_tidptr); -} - -/* - * This is trivial, and on the face of it looks like it - * could equally well be done in user mode. - * - * Not so, for quite unobvious reasons - register pressure. - * In user mode vfork() cannot have a stack frame, and if - * done by calling the "clone()" system call directly, you - * do not have enough call-clobbered registers to hold all - * the information you need. - */ -asmlinkage int sys_vfork(void) -{ - struct pt_regs *regs = current_pt_regs(); - return do_fork(CLONE_VFORK | CLONE_VM | SIGCHLD, regs->spu, regs, 0, - NULL, NULL); -} - /* * These bracket the sleeping functions.. */ -- 2.30.2