Commit ea516b11 authored by Al Viro's avatar Al Viro
Browse files

powerpc: put the "zero usp means using parent's stack pointer" to copy_thread() 



simplifies callers, at that...

Signed-off-by: default avatarAl Viro <viro@zeniv.linux.org.uk>
parent 64c2f659

arch/powerpc/kernel/process.c

+4 −5
Original line number Diff line number Diff line
@@ -761,6 +761,7 @@ int copy_thread(unsigned long clone_flags, unsigned long usp, 
	} else {

		CHECK_FULL_REGS(regs);

		*childregs = *regs;

		if (usp)

			childregs->gpr[1] = usp;

		p->thread.regs = childregs;

		childregs->gpr[3] = 0;  /* Result from fork() */
@@ -1030,8 +1031,6 @@ int sys_clone(unsigned long clone_flags, unsigned long usp, 
	      int __user *child_tidp, int p6,

	      struct pt_regs *regs)

{

	if (usp == 0)

		usp = regs->gpr[1];	/* stack pointer for child */

 	return do_fork(clone_flags, usp, regs, 0, parent_tidp, child_tidp);

}
@@ -1039,14 +1038,14 @@ int sys_fork(unsigned long p1, unsigned long p2, unsigned long p3, 
	     unsigned long p4, unsigned long p5, unsigned long p6,

	     struct pt_regs *regs)

{

	return do_fork(SIGCHLD, regs->gpr[1], regs, 0, NULL, NULL);

	return do_fork(SIGCHLD, 0, regs, 0, NULL, NULL);

}



int sys_vfork(unsigned long p1, unsigned long p2, unsigned long p3,

	      unsigned long p4, unsigned long p5, unsigned long p6,

	      struct pt_regs *regs)

{

	return do_fork(CLONE_VFORK | CLONE_VM | SIGCHLD, regs->gpr[1],

	return do_fork(CLONE_VFORK | CLONE_VM | SIGCHLD, 0,

			regs, 0, NULL, NULL);

}