s390/entry: align system call table on 8 bytes

Align system call table on 8 bytes. With sys_call_table entry size
of 8 bytes that eliminates the possibility of a system call pointer
crossing cache line boundary.

Cc: [email protected]
Suggested-by: Ulrich Weigand <[email protected]>
Reviewed-by: Alexander Gordeev <[email protected]>
Signed-off-by: Sumanth Korikkar <[email protected]>
Signed-off-by: Vasily Gorbik <[email protected]>

Author: sumanthkorikkar

arch/s390/kernel/entry.S

@@ -635,6 +635,7 @@ SYM_DATA_START_LOCAL(daton_psw)
 SYM_DATA_END(daton_psw)
 
 	.section .rodata, "a"
+	.balign	8
 #define SYSCALL(esame,emu)	.quad __s390x_ ## esame
 SYM_DATA_START(sys_call_table)
 #include "asm/syscall_table.h"