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| author | Al Viro <viro@zeniv.linux.org.uk> | 2012-10-10 21:35:42 -0400 |
|---|---|---|
| committer | Al Viro <viro@zeniv.linux.org.uk> | 2012-10-12 13:35:22 -0400 |
| commit | 22e2430d60dbdfcdd732a086e9ef2dbd74c266d1 (patch) | |
| tree | 687067fcaf2761015639178033ee16c8511703b8 /arch/um | |
| parent | a74fb73c12398b250fdc5e333a11e15a9e3a84fc (diff) | |
| download | linux-3.10-22e2430d60dbdfcdd732a086e9ef2dbd74c266d1.tar.gz linux-3.10-22e2430d60dbdfcdd732a086e9ef2dbd74c266d1.tar.bz2 linux-3.10-22e2430d60dbdfcdd732a086e9ef2dbd74c266d1.zip | |
x86, um: convert to saner kernel_execve() semantics
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'arch/um')
| -rw-r--r-- | arch/um/include/asm/processor-generic.h | 2 | ||||
| -rw-r--r-- | arch/um/include/shared/os.h | 1 | ||||
| -rw-r--r-- | arch/um/kernel/exec.c | 5 | ||||
| -rw-r--r-- | arch/um/kernel/process.c | 10 | ||||
| -rw-r--r-- | arch/um/os-Linux/process.c | 13 |
5 files changed, 3 insertions, 28 deletions
diff --git a/arch/um/include/asm/processor-generic.h b/arch/um/include/asm/processor-generic.h index 5d9ab0c4f48..62435a00e70 100644 --- a/arch/um/include/asm/processor-generic.h +++ b/arch/um/include/asm/processor-generic.h @@ -26,7 +26,6 @@ struct thread_struct { jmp_buf *fault_catcher; struct task_struct *prev_sched; unsigned long temp_stack; - jmp_buf *exec_buf; struct arch_thread arch; jmp_buf switch_buf; int mm_count; @@ -54,7 +53,6 @@ struct thread_struct { .fault_addr = NULL, \ .prev_sched = NULL, \ .temp_stack = 0, \ - .exec_buf = NULL, \ .arch = INIT_ARCH_THREAD, \ .request = { 0 } \ } diff --git a/arch/um/include/shared/os.h b/arch/um/include/shared/os.h index 89b686c1a3e..25dbd372d32 100644 --- a/arch/um/include/shared/os.h +++ b/arch/um/include/shared/os.h @@ -191,7 +191,6 @@ extern int os_getpid(void); extern int os_getpgrp(void); extern void init_new_thread_signals(void); -extern int run_kernel_thread(int (*fn)(void *), void *arg, jmp_buf **jmp_ptr); extern int os_map_memory(void *virt, int fd, unsigned long long off, unsigned long len, int r, int w, int x); diff --git a/arch/um/kernel/exec.c b/arch/um/kernel/exec.c index e427301f55d..565ca396d83 100644 --- a/arch/um/kernel/exec.c +++ b/arch/um/kernel/exec.c @@ -47,8 +47,3 @@ void start_thread(struct pt_regs *regs, unsigned long eip, unsigned long esp) #endif } EXPORT_SYMBOL(start_thread); - -void __noreturn ret_from_kernel_execve(struct pt_regs *unused) -{ - UML_LONGJMP(current->thread.exec_buf, 1); -} diff --git a/arch/um/kernel/process.c b/arch/um/kernel/process.c index a1b50add48a..94b0d8b9810 100644 --- a/arch/um/kernel/process.c +++ b/arch/um/kernel/process.c @@ -135,14 +135,10 @@ void new_thread_handler(void) arg = current->thread.request.u.thread.arg; /* - * The return value is 1 if the kernel thread execs a process, - * 0 if it just exits + * callback returns only if the kernel thread execs a process */ - n = run_kernel_thread(fn, arg, ¤t->thread.exec_buf); - if (n == 1) - userspace(¤t->thread.regs.regs); - else - do_exit(0); + n = fn(arg); + userspace(¤t->thread.regs.regs); } /* Called magically, see new_thread_handler above */ diff --git a/arch/um/os-Linux/process.c b/arch/um/os-Linux/process.c index 307f173e7f8..a04ec167a9c 100644 --- a/arch/um/os-Linux/process.c +++ b/arch/um/os-Linux/process.c @@ -244,16 +244,3 @@ void init_new_thread_signals(void) signal(SIGWINCH, SIG_IGN); signal(SIGTERM, SIG_DFL); } - -int run_kernel_thread(int (*fn)(void *), void *arg, jmp_buf **jmp_ptr) -{ - jmp_buf buf; - int n; - - *jmp_ptr = &buf; - n = UML_SETJMP(&buf); - if (n != 0) - return n; - (*fn)(arg); - return 0; -} |