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Date: Thu, 6 Mar 2014 18:56:36 +0100 From: Frederic Weisbecker <fweisbec@...il.com> To: LKML <linux-kernel@...r.kernel.org> Cc: Frederic Weisbecker <fweisbec@...il.com>, Ingo Molnar <mingo@...nel.org>, Marcelo Tosatti <mtosatti@...hat.com>, Peter Zijlstra <peterz@...radead.org>, Thomas Gleixner <tglx@...utronix.de> Subject: [PATCH 1/6] 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@...nel.org> Cc: Marcelo Tosatti <mtosatti@...hat.com> Cc: Peter Zijlstra <peterz@...radead.org> Cc: Thomas Gleixner <tglx@...utronix.de> Signed-off-by: Frederic Weisbecker <fweisbec@...il.com> --- include/asm-generic/cputime_nsecs.h | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/include/asm-generic/cputime_nsecs.h b/include/asm-generic/cputime_nsecs.h index 2c9e62c..768294f 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) /* -- 1.8.3.1 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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