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authorAl Viro <viro@zeniv.linux.org.uk>2012-10-22 22:34:11 -0400
committerAl Viro <viro@zeniv.linux.org.uk>2012-11-28 22:13:44 -0500
commit1d4b4b2994b5fc208963c0b795291f8c1f18becf (patch)
treebefe27a3e2abc333b5bd81ee7381e4c5541f543f /arch/x86/kernel/process.c
parent71613c3b871c5a9f27cc48f124251bcd3aa23be1 (diff)
x86, um: switch to generic fork/vfork/clone
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'arch/x86/kernel/process.c')
-rw-r--r--arch/x86/kernel/process.c30
1 files changed, 0 insertions, 30 deletions
diff --git a/arch/x86/kernel/process.c b/arch/x86/kernel/process.c
index b644e1c765dc..fe9459593257 100644
--- a/arch/x86/kernel/process.c
+++ b/arch/x86/kernel/process.c
@@ -262,36 +262,6 @@ void __switch_to_xtra(struct task_struct *prev_p, struct task_struct *next_p,
262 propagate_user_return_notify(prev_p, next_p); 262 propagate_user_return_notify(prev_p, next_p);
263} 263}
264 264
265int sys_fork(struct pt_regs *regs)
266{
267 return do_fork(SIGCHLD, regs->sp, regs, 0, NULL, NULL);
268}
269
270/*
271 * This is trivial, and on the face of it looks like it
272 * could equally well be done in user mode.
273 *
274 * Not so, for quite unobvious reasons - register pressure.
275 * In user mode vfork() cannot have a stack frame, and if
276 * done by calling the "clone()" system call directly, you
277 * do not have enough call-clobbered registers to hold all
278 * the information you need.
279 */
280int sys_vfork(struct pt_regs *regs)
281{
282 return do_fork(CLONE_VFORK | CLONE_VM | SIGCHLD, regs->sp, regs, 0,
283 NULL, NULL);
284}
285
286long
287sys_clone(unsigned long clone_flags, unsigned long newsp,
288 void __user *parent_tid, void __user *child_tid, struct pt_regs *regs)
289{
290 if (!newsp)
291 newsp = regs->sp;
292 return do_fork(clone_flags, newsp, regs, 0, parent_tid, child_tid);
293}
294
295/* 265/*
296 * Idle related variables and functions 266 * Idle related variables and functions
297 */ 267 */