s390: make STACK_FRAME_OVERHEAD available via asm-offsets.h

Make STACK_FRAME_OVERHEAD available via asm-offsets.h. This allows to
add s390 specific asm code to e.g. ftrace samples, without requiring
to add random header files, which might cause all sort of problems on
other architectures. asm-offsets.h can be assumed to be non-problematic.

Acked-by: Ilya Leoshkevich <iii@linux.ibm.com>
Reviewed-by: Sven Schnelle <svens@linux.ibm.com>
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
Acked-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
Link: https://lore.kernel.org/r/20211012133802.2460757-3-hca@linux.ibm.com
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>

diff --git a/arch/s390/kernel/asm-offsets.c b/arch/s390/kernel/asm-offsets.c
index b57da93..b6ee3fd 100644 (file)
--- a/arch/s390/kernel/asm-offsets.c
+++ b/arch/s390/kernel/asm-offsets.c
@@ -45,6 +45,7 @@ int main(void)
        OFFSET(__SF_SIE_SAVEAREA, stack_frame, empty1[2]);
        OFFSET(__SF_SIE_REASON, stack_frame, empty1[3]);
        OFFSET(__SF_SIE_FLAGS, stack_frame, empty1[4]);
+       DEFINE(STACK_FRAME_OVERHEAD, sizeof(struct stack_frame));
        BLANK();
        /* idle data offsets */
        OFFSET(__CLOCK_IDLE_ENTER, s390_idle_data, clock_idle_enter);