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-rw-r--r--include/asm-powerpc/cputime.h18
1 files changed, 18 insertions, 0 deletions
diff --git a/include/asm-powerpc/cputime.h b/include/asm-powerpc/cputime.h
index a21185d47883..310804485208 100644
--- a/include/asm-powerpc/cputime.h
+++ b/include/asm-powerpc/cputime.h
@@ -43,6 +43,7 @@ typedef u64 cputime64_t;
#define cputime64_zero ((cputime64_t)0)
#define cputime64_add(__a, __b) ((__a) + (__b))
+#define cputime64_sub(__a, __b) ((__a) - (__b))
#define cputime_to_cputime64(__ct) (__ct)
#ifdef __KERNEL__
@@ -74,6 +75,23 @@ static inline cputime_t jiffies_to_cputime(const unsigned long jif)
return ct;
}
+static inline cputime64_t jiffies64_to_cputime64(const u64 jif)
+{
+ cputime_t ct;
+ u64 sec;
+
+ /* have to be a little careful about overflow */
+ ct = jif % HZ;
+ sec = jif / HZ;
+ if (ct) {
+ ct *= tb_ticks_per_sec;
+ do_div(ct, HZ);
+ }
+ if (sec)
+ ct += (cputime_t) sec * tb_ticks_per_sec;
+ return ct;
+}
+
static inline u64 cputime64_to_jiffies64(const cputime_t ct)
{
return mulhdu(ct, __cputime_jiffies_factor);