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authorMichael Neuling <mikey@neuling.org>2008-02-06 01:36:12 -0800
committerLinus Torvalds <torvalds@woody.linux-foundation.org>2008-02-06 10:41:00 -0800
commit06b8e878a9bc9301201cffe186eba99c4185f20a (patch)
tree857434ed559cdb001177e81283be6f0b5693a781 /include/asm-s390
parentd9afa43532adf8a31b93c4c7601fda3f423d8972 (diff)
taskstats scaled time cleanup
This moves the ability to scale cputime into generic code. This allows us to fix the issue in kernel/timer.c (noticed by Balbir) where we could only add an unscaled value to the scaled utime/stime. This adds a cputime_to_scaled function. As before, the POWERPC version does the scaling based on the last SPURR/PURR ratio calculated. The generic and s390 (only other arch to implement asm/cputime.h) versions are both NOPs. Also moves the SPURR and PURR snapshots closer. Signed-off-by: Michael Neuling <mikey@neuling.org> Cc: Jay Lan <jlan@engr.sgi.com> Cc: Paul Mackerras <paulus@samba.org> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Heiko Carstens <heiko.carstens@de.ibm.com> Cc: Martin Schwidefsky <schwidefsky@de.ibm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'include/asm-s390')
-rw-r--r--include/asm-s390/cputime.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/include/asm-s390/cputime.h b/include/asm-s390/cputime.h
index 4b3ef7cad11..133ce054fc8 100644
--- a/include/asm-s390/cputime.h
+++ b/include/asm-s390/cputime.h
@@ -54,6 +54,7 @@ __div(unsigned long long n, unsigned int base)
#define cputime_lt(__a, __b) ((__a) < (__b))
#define cputime_le(__a, __b) ((__a) <= (__b))
#define cputime_to_jiffies(__ct) (__div((__ct), 1000000 / HZ))
+#define cputime_to_scaled(__ct) (__ct)
#define jiffies_to_cputime(__hz) ((cputime_t)(__hz) * (1000000 / HZ))
#define cputime64_zero (0ULL)