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authorAndi Kleen <ak@suse.de>2006-10-21 18:37:02 +0200
committerAndi Kleen <andi@basil.nowhere.org>2006-10-21 18:37:02 +0200
commit8cf2c51927bbeefafc25193d01b91f9ed3806e96 (patch)
tree5618f59fc5a9b98e13465746c170433fa37c3eb7 /arch
parent6bf2dafad18c119beb534cbb3d882fe7a6c3f529 (diff)
[PATCH] x86: Revert new unwind kernel stack termination
Jan convinced me that it was unnecessary because the assembly stubs do this already on the stack. Cc: jbeulich@novell.com Signed-off-by: Andi Kleen <ak@suse.de>
Diffstat (limited to 'arch')
-rw-r--r--arch/i386/kernel/process.c6
-rw-r--r--arch/x86_64/kernel/entry.S5
2 files changed, 1 insertions, 10 deletions
diff --git a/arch/i386/kernel/process.c b/arch/i386/kernel/process.c
index 57d375900afb..1e1fa3e391a3 100644
--- a/arch/i386/kernel/process.c
+++ b/arch/i386/kernel/process.c
@@ -336,7 +336,6 @@ extern void kernel_thread_helper(void);
int kernel_thread(int (*fn)(void *), void * arg, unsigned long flags)
{
struct pt_regs regs;
- int err;
memset(&regs, 0, sizeof(regs));
@@ -351,10 +350,7 @@ int kernel_thread(int (*fn)(void *), void * arg, unsigned long flags)
regs.eflags = X86_EFLAGS_IF | X86_EFLAGS_SF | X86_EFLAGS_PF | 0x2;
/* Ok, create the new process.. */
- err = do_fork(flags | CLONE_VM | CLONE_UNTRACED, 0, &regs, 0, NULL, NULL);
- if (err == 0) /* terminate kernel stack */
- task_pt_regs(current)->eip = 0;
- return err;
+ return do_fork(flags | CLONE_VM | CLONE_UNTRACED, 0, &regs, 0, NULL, NULL);
}
EXPORT_SYMBOL(kernel_thread);
diff --git a/arch/x86_64/kernel/entry.S b/arch/x86_64/kernel/entry.S
index e3eddde3d3bb..7d401b00d822 100644
--- a/arch/x86_64/kernel/entry.S
+++ b/arch/x86_64/kernel/entry.S
@@ -980,11 +980,6 @@ ENTRY(kernel_thread)
call do_fork
movq %rax,RAX(%rsp)
xorl %edi,%edi
- test %rax,%rax
- jnz 1f
- /* terminate stack in child */
- movq %rdi,RIP(%rsp)
-1:
/*
* It isn't worth to check for reschedule here,