x86_64, dwarf2: push pushes 8 bytes and popf pops 8

[Alexander van Heukelum]

The CFI_ADJUST_CFA_OFFSET dwarf2 annotation of a push/popf
pair in ret_from_fork wrongly used a value of 4. It should
have been 8. Fix that.

Signed-off-by: Alexander van Heukelum <heukelum@xxxxxxxxxxx>

diff --git a/arch/x86/kernel/entry_64.S b/arch/x86/kernel/entry_64.S
index ae63e58..5f6cac6 100644
--- a/arch/x86/kernel/entry_64.S
+++ b/arch/x86/kernel/entry_64.S
@@ -269,9 +269,9 @@ ENTRY(native_usergs_sysret64)
 ENTRY(ret_from_fork)
 	CFI_DEFAULT_STACK
 	push kernel_eflags(%rip)
-	CFI_ADJUST_CFA_OFFSET 4
+	CFI_ADJUST_CFA_OFFSET 8
 	popf				# reset kernel eflags
-	CFI_ADJUST_CFA_OFFSET -4
+	CFI_ADJUST_CFA_OFFSET -8
 	call schedule_tail
 	GET_THREAD_INFO(%rcx)
 	testl $(_TIF_SYSCALL_TRACE|_TIF_SYSCALL_AUDIT),TI_flags(%rcx)

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