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| author | Frederic Weisbecker <fweisbec@gmail.com> | 2014-03-05 15:33:18 +0100 |
|---|---|---|
| committer | Frederic Weisbecker <fweisbec@gmail.com> | 2014-03-13 15:56:43 +0100 |
| commit | 69bb2600c9f8ca450fede9633edf9c2513c9ee6f (patch) | |
| tree | 882511f34317d6c092430f9f19f6d89e9231c623 /include/asm-generic/cputime_nsecs.h | |
| parent | locking/mutex: Fix debug checks (diff) | |
| download | linux-69bb2600c9f8ca450fede9633edf9c2513c9ee6f.tar.xz linux-69bb2600c9f8ca450fede9633edf9c2513c9ee6f.zip | |
cputime: Fix nsecs_to_cputime() return type cast
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>
Diffstat (limited to 'include/asm-generic/cputime_nsecs.h')
| -rw-r--r-- | include/asm-generic/cputime_nsecs.h | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/include/asm-generic/cputime_nsecs.h b/include/asm-generic/cputime_nsecs.h index 2c9e62c2bfd0..768294f8bf85 100644 --- a/include/asm-generic/cputime_nsecs.h +++ b/include/asm-generic/cputime_nsecs.h @@ -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) /* |