diff options
| author | Heiko Carstens <heiko.carstens@de.ibm.com> | 2016-12-15 12:15:17 +0100 |
|---|---|---|
| committer | Martin Schwidefsky <schwidefsky@de.ibm.com> | 2017-01-16 07:27:51 +0100 |
| commit | 57c52ae75774c717eb7cd777b5438244ae6b380c (patch) | |
| tree | b6e7c52104aed2e3b1abd359623974c4ab78217f /drivers/s390 | |
| parent | 227374b1dd08cc052f36768a97a6e3ce628318fc (diff) | |
| download | lwn-57c52ae75774c717eb7cd777b5438244ae6b380c.tar.gz lwn-57c52ae75774c717eb7cd777b5438244ae6b380c.zip | |
s390/zcrypt: get rid of variable length arrays
The variable length arrays used to specify clobbered memory within
ap_nqap and ap_dqap would only work if the length would be known at
compile time.
This is not the case for both usages. Therefore simply use a full
memory clobber and get rid of the old construct.
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'drivers/s390')
| -rw-r--r-- | drivers/s390/crypto/ap_asm.h | 10 |
1 files changed, 4 insertions, 6 deletions
diff --git a/drivers/s390/crypto/ap_asm.h b/drivers/s390/crypto/ap_asm.h index 7a630047c372..287b4ad0999e 100644 --- a/drivers/s390/crypto/ap_asm.h +++ b/drivers/s390/crypto/ap_asm.h @@ -129,7 +129,6 @@ static inline struct ap_queue_status ap_nqap(ap_qid_t qid, unsigned long long psmid, void *msg, size_t length) { - struct msgblock { char _[length]; }; register unsigned long reg0 asm ("0") = qid | 0x40000000UL; register struct ap_queue_status reg1 asm ("1"); register unsigned long reg2 asm ("2") = (unsigned long) msg; @@ -141,8 +140,8 @@ static inline struct ap_queue_status ap_nqap(ap_qid_t qid, "0: .long 0xb2ad0042\n" /* NQAP */ " brc 2,0b" : "+d" (reg0), "=d" (reg1), "+d" (reg2), "+d" (reg3) - : "d" (reg4), "d" (reg5), "m" (*(struct msgblock *) msg) - : "cc"); + : "d" (reg4), "d" (reg5) + : "cc", "memory"); return reg1; } @@ -168,7 +167,6 @@ static inline struct ap_queue_status ap_dqap(ap_qid_t qid, unsigned long long *psmid, void *msg, size_t length) { - struct msgblock { char _[length]; }; register unsigned long reg0 asm("0") = qid | 0x80000000UL; register struct ap_queue_status reg1 asm ("1"); register unsigned long reg2 asm("2") = 0UL; @@ -182,8 +180,8 @@ static inline struct ap_queue_status ap_dqap(ap_qid_t qid, "0: .long 0xb2ae0064\n" /* DQAP */ " brc 6,0b\n" : "+d" (reg0), "=d" (reg1), "+d" (reg2), - "+d" (reg4), "+d" (reg5), "+d" (reg6), "+d" (reg7), - "=m" (*(struct msgblock *) msg) : : "cc"); + "+d" (reg4), "+d" (reg5), "+d" (reg6), "+d" (reg7) + : : "cc", "memory"); *psmid = (((unsigned long long) reg6) << 32) + reg7; return reg1; } |