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authorMartin Schwidefsky <schwidefsky@de.ibm.com>2007-07-10 11:24:14 +0200
committerMartin Schwidefsky <schwidefsky@de.ibm.com>2007-07-10 11:24:47 +0200
commit8a88367088a6b9964d99694b30d80720f019bea2 (patch)
tree6fe082e731cdf56983934e11ebfcfc1d10664e5b /include/asm-s390/sfp-util.h
parent285f67227b63309d699f5bda25ba34962503398f (diff)
downloadlinux-2.6.34-ux500-8a88367088a6b9964d99694b30d80720f019bea2.tar.gz
[S390] Bogomips calculation for 64 bit.
The bogomips calculation triggered via reading from /proc/cpuinfo can return incorrect values if the qrnnd assembly is called with a pointer in %r2 with any of the upper 32 bits set. Fix this by using 64 bit division / remainder operation provided by gcc instead of calling the assembly. Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'include/asm-s390/sfp-util.h')
-rw-r--r--include/asm-s390/sfp-util.h11
1 files changed, 11 insertions, 0 deletions
diff --git a/include/asm-s390/sfp-util.h b/include/asm-s390/sfp-util.h
index 8cabcd23d97..0addc6466d9 100644
--- a/include/asm-s390/sfp-util.h
+++ b/include/asm-s390/sfp-util.h
@@ -51,6 +51,16 @@
wl = __wl; \
})
+#ifdef __s390x__
+#define udiv_qrnnd(q, r, n1, n0, d) \
+ do { unsigned long __n; \
+ unsigned int __r, __d; \
+ __n = ((unsigned long)(n1) << 32) + n0; \
+ __d = (d); \
+ (q) = __n / __d; \
+ (r) = __n % __d; \
+ } while (0)
+#else
#define udiv_qrnnd(q, r, n1, n0, d) \
do { unsigned int __r; \
(q) = __udiv_qrnnd (&__r, (n1), (n0), (d)); \
@@ -58,6 +68,7 @@
} while (0)
extern unsigned long __udiv_qrnnd (unsigned int *, unsigned int,
unsigned int , unsigned int);
+#endif
#define UDIV_NEEDS_NORMALIZATION 0