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| author |   Christophe Leroy <christophe.leroy@c-s.fr> | 2016-05-17 08:33:46 +0200 |
|---|---|---|
| committer |   Scott Wood <oss@buserror.net> | 2016-07-09 01:43:50 -0500 |
| commit | c223c90386bc2306510e0ceacd768a0123ff2a2f (patch) | |
| tree | 520a7bc88a7e36bbd0615cc5a035337a36729fb8 /arch/powerpc/include/asm/cputime.h | |
| parent | T104xQDS: Add qe node to t104xqds (diff) | |
| download | linux-dev-c223c90386bc2306510e0ceacd768a0123ff2a2f.tar.xz linux-dev-c223c90386bc2306510e0ceacd768a0123ff2a2f.zip | |
powerpc32: provide VIRT_CPU_ACCOUNTING
This patch provides VIRT_CPU_ACCOUTING to PPC32 architecture.
PPC32 doesn't have the PACA structure, so we use the task_info
structure to store the accounting data.
In order to reuse on PPC32 the PPC64 functions, all u64 data has
been replaced by 'unsigned long' so that it is u32 on PPC32 and
u64 on PPC64
Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>
Signed-off-by: Scott Wood <oss@buserror.net>
Diffstat (limited to 'arch/powerpc/include/asm/cputime.h')
| -rw-r--r-- | arch/powerpc/include/asm/cputime.h | 14 |
1 files changed, 11 insertions, 3 deletions
diff --git a/arch/powerpc/include/asm/cputime.h b/arch/powerpc/include/asm/cputime.h index e2452550bcb1..2dfd4fc41f3e 100644 --- a/arch/powerpc/include/asm/cputime.h +++ b/arch/powerpc/include/asm/cputime.h @@ -90,11 +90,10 @@ static inline void setup_cputime_one_jiffy(void) static inline cputime64_t jiffies64_to_cputime64(const u64 jif) { u64 ct; - u64 sec; + u64 sec = jif; /* have to be a little careful about overflow */ - ct = jif % HZ; - sec = jif / HZ; + ct = do_div(sec, HZ); if (ct) { ct *= tb_ticks_per_sec; do_div(ct, HZ); @@ -230,7 +229,16 @@ static inline cputime_t clock_t_to_cputime(const unsigned long clk) #define cputime64_to_clock_t(ct) cputime_to_clock_t((cputime_t)(ct)) +/* + * PPC64 uses PACA which is task independent for storing accounting data while + * PPC32 uses struct thread_info, therefore at task switch the accounting data + * has to be populated in the new task + */ +#ifdef CONFIG_PPC64 static inline void arch_vtime_task_switch(struct task_struct *tsk) { } +#else +void arch_vtime_task_switch(struct task_struct *tsk); +#endif #endif /* __KERNEL__ */ #endif /* CONFIG_VIRT_CPU_ACCOUNTING_NATIVE */ |