Commit b02454f4 authored by Heiko Carstens's avatar Heiko Carstens Committed by Linus Torvalds

[PATCH] lockdep: special s390 print_symbol() version

Have a special version of print_symbol() for s390 which clears the most
significant bit of addr before calling __print_symbol().  This seems to be
better than checking/changing each place in the kernel that saves an
instruction pointer.

Without this the output would look like:

hardirqs last  enabled at (30907): [<80018c6a>] 0x80018c6a
hardirqs last disabled at (30908): [<8001e48c>] 0x8001e48c
softirqs last  enabled at (30904): [<8001dc96>] 0x8001dc96
softirqs last disabled at (30897): [<8001dc50>] 0x8001dc50

instead of this:

hardirqs last  enabled at (19421): [<80018c72>] cpu_idle+0x176/0x1c4
hardirqs last disabled at (19422): [<8001e494>] io_no_vtime+0xa/0x1a
softirqs last  enabled at (19418): [<8001dc9e>] do_softirq+0xa6/0xe8
softirqs last disabled at (19411): [<8001dc58>] do_softirq+0x60/0xe8
Acked-by: default avatarIngo Molnar <>
Cc: Arjan van de Ven <>
Cc: Martin Schwidefsky <>
Signed-off-by: default avatarHeiko Carstens <>
Signed-off-by: default avatarAndrew Morton <>
Signed-off-by: default avatarLinus Torvalds <>
parent dada0769
......@@ -57,10 +57,11 @@ do { \
#define print_fn_descriptor_symbol(fmt, addr) print_symbol(fmt, addr)
#define print_symbol(fmt, addr) \
do { \
__check_printsym_format(fmt, ""); \
__print_symbol(fmt, addr); \
} while(0)
static inline void print_symbol(const char *fmt, unsigned long addr)
__check_printsym_format(fmt, "");
__print_symbol(fmt, (unsigned long)
__builtin_extract_return_addr((void *)addr));
#endif /*_LINUX_KALLSYMS_H*/
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