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| author | Heiko Carstens <heiko.carstens@de.ibm.com> | 2016-06-20 15:06:09 +0300 |
|---|---|---|
| committer | Martin Schwidefsky <schwidefsky@de.ibm.com> | 2016-06-28 10:32:37 +0300 |
| commit | e030c1125eab9eb822a7a271ed233a77ebfa2629 (patch) | |
| tree | e179606da5fae5b0beb82dd07ef9062d1b1aa281 | |
| parent | 2c79813a1f459dd702f9b324a96b0849dd02a6a4 (diff) | |
| download | linux-e030c1125eab9eb822a7a271ed233a77ebfa2629.tar.xz | |
s390/hypfs: use basic block for diag inline assembly
Use only simple inline assemblies which consist of a single basic
block if the register asm construct is being used.
Otherwise gcc would generate broken code if the compiler option
--sanitize-coverage=trace-pc would be used.
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
| -rw-r--r-- | arch/s390/hypfs/hypfs_diag.c | 12 |
1 files changed, 7 insertions, 5 deletions
diff --git a/arch/s390/hypfs/hypfs_diag.c b/arch/s390/hypfs/hypfs_diag.c index 27779f0743ac..67d43a0eabb4 100644 --- a/arch/s390/hypfs/hypfs_diag.c +++ b/arch/s390/hypfs/hypfs_diag.c @@ -337,9 +337,9 @@ static inline __u64 phys_cpu__ctidx(enum diag204_format type, void *hdr) /* Diagnose 204 functions */ -static inline int __diag204(unsigned long subcode, unsigned long size, void *addr) +static inline int __diag204(unsigned long *subcode, unsigned long size, void *addr) { - register unsigned long _subcode asm("0") = subcode; + register unsigned long _subcode asm("0") = *subcode; register unsigned long _size asm("1") = size; asm volatile( @@ -347,15 +347,17 @@ static inline int __diag204(unsigned long subcode, unsigned long size, void *add "0: nopr %%r7\n" EX_TABLE(0b,0b) : "+d" (_subcode), "+d" (_size) : "d" (addr) : "memory"); - if (_subcode) - return -1; + *subcode = _subcode; return _size; } static int diag204(unsigned long subcode, unsigned long size, void *addr) { diag_stat_inc(DIAG_STAT_X204); - return __diag204(subcode, size, addr); + size = __diag204(&subcode, size, addr); + if (subcode) + return -1; + return size; } /* |