Merge branch 'upstream' of git://lost.foo-projects.org/~ahkok/git/netdev-2.6 into...

[pandora-kernel.git] / arch / i386 / kernel / vsyscall-sysenter.S

diff --git a/arch/i386/kernel/vsyscall-sysenter.S b/arch/i386/kernel/vsyscall-sysenter.S
index 76b7281..1a36d26 100644 (file)
--- a/arch/i386/kernel/vsyscall-sysenter.S
+++ b/arch/i386/kernel/vsyscall-sysenter.S
@@ -21,6 +21,9 @@
  * instruction clobbers %esp, the user's %esp won't even survive entry
  * into the kernel. We store %esp in %ebp. Code in entry.S must fetch
  * arg6 from the stack.
+ *
+ * You can not use this vsyscall for the clone() syscall because the
+ * three dwords on the parent stack do not get copied to the child.
  */
        .text
        .globl __kernel_vsyscall
@@ -39,10 +42,10 @@ __kernel_vsyscall:
        /* 7: align return point with nop's to make disassembly easier */
        .space 7,0x90
 
-       /* 14: System call restart point is here! (SYSENTER_RETURN - 2) */
+       /* 14: System call restart point is here! (SYSENTER_RETURN-2) */
        jmp .Lenter_kernel
        /* 16: System call normal return point is here! */
-       .globl SYSENTER_RETURN  /* Symbol used by entry.S.  */
+       .globl SYSENTER_RETURN  /* Symbol used by sysenter.c  */
 SYSENTER_RETURN:
        pop %ebp
 .Lpop_ebp: