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cputime: Fix nsecs_to_cputime() return type cast

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Even though nsec based cputime_t maps to u64, nsecs_to_cputime() must
return a cputime_t value. We want to enforce this kind of cast in order
to track down buggy manipulations of cputime_t such as direct access
of its values under wrong assumptions on its backend type (nsecs,
jiffies, etc...) by core code.

Cc: Ingo Molnar <mingo@kernel.org>
Cc: Marcelo Tosatti <mtosatti@redhat.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Acked-by: Rik van Riel <riel@redhat.com>
Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
This commit is contained in:
Frederic Weisbecker 2014-03-05 15:33:18 +01:00
parent 6f008e72cd
commit 69bb2600c9
1 changed files with 2 additions and 1 deletions
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3
include/asm-generic/cputime_nsecs.h
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@ -44,7 +44,8 @@ typedef u64 __nocast cputime64_t;
/*
* Convert cputime <-> nanoseconds
*/
#define nsecs_to_cputime(__nsecs) ((__force u64)(__nsecs))
#define nsecs_to_cputime(__nsecs) \
(__force cputime_t)(__nsecs)
/*