[PATCH] powerpc: implement missing jiffies64_to_cputime64()
asm-powerpc/cputime.h doesn't declare jiffies64_to_cputime64() or cputime64_sub(), and due to CONFIG_VIRT_CPU_ACCOUNTING it's not picking up the definition from asm-generic like x86-64 & friends do. Cc: Dave Jones <davej@redhat.com> Cc: Andrew Morton <akpm@osdl.org> Signed-off-by: David Woodhouse <dwmw2@infradead.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
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@ -43,6 +43,7 @@ typedef u64 cputime64_t;
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#define cputime64_zero ((cputime64_t)0)
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#define cputime64_add(__a, __b) ((__a) + (__b))
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#define cputime64_sub(__a, __b) ((__a) - (__b))
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#define cputime_to_cputime64(__ct) (__ct)
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#ifdef __KERNEL__
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@ -74,6 +75,23 @@ static inline cputime_t jiffies_to_cputime(const unsigned long jif)
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return ct;
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}
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static inline cputime64_t jiffies64_to_cputime64(const u64 jif)
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{
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cputime_t ct;
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u64 sec;
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/* have to be a little careful about overflow */
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ct = jif % HZ;
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sec = jif / HZ;
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if (ct) {
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ct *= tb_ticks_per_sec;
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do_div(ct, HZ);
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}
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if (sec)
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ct += (cputime_t) sec * tb_ticks_per_sec;
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return ct;
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}
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static inline u64 cputime64_to_jiffies64(const cputime_t ct)
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{
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return mulhdu(ct, __cputime_jiffies_factor);
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