x86,64: Separate arg1 from rbp handling in SAVE_REGS_IRQ

Just for clarity in the code. Have a first block that handles
the frame pointer and a separate one that handles pt_regs
pointer and its use.

Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Jan Beulich <JBeulich@novell.com>

diff --git a/arch/x86/kernel/entry_64.S b/arch/x86/kernel/entry_64.S
index b6b2e85..20dc8e6 100644 (file)
--- a/arch/x86/kernel/entry_64.S
+++ b/arch/x86/kernel/entry_64.S
@@ -310,9 +310,10 @@ ENDPROC(native_usergs_sysret64)
        movq_cfi r10, R10-RBP
        movq_cfi r11, R11-RBP
 
-       leaq -RBP(%rsp),%rdi    /* arg1 for handler */
        movq_cfi rbp, 0         /* push %rbp */
        movq %rsp, %rbp
+
+       leaq -RBP(%rsp),%rdi    /* arg1 for handler */
        testl $3, CS(%rdi)
        je 1f
        SWAPGS