[v2] eal: fix macros to align value
diff mbox series

Message ID 1592994047-22665-1-git-send-email-hkalra@marvell.com
State Accepted
Delegated to: Thomas Monjalon
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Series
  • [v2] eal: fix macros to align value
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ci/Intel-compilation success Compilation OK
ci/iol-mellanox-Performance success Performance Testing PASS
ci/travis-robot success Travis build: passed
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Commit Message

Harman Kalra June 24, 2020, 10:20 a.m. UTC
Found an issue while using RTE_ALIGN_MUL_NEAR with an
expression, like as passed in estimate_tsc_freq().
RTE_ALIGN_MUL_FLOOR resulted in unexpected value as
parathesis are required to evaluate an expression.

Fixes: 5120203d753f ("eal: add macros to align value to multiple")
Cc: stable@dpdk.org

Signed-off-by: Harman Kalra <hkalra@marvell.com>
---
*V2: improved commit message.

 lib/librte_eal/include/rte_common.h | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

Comments

Thomas Monjalon July 11, 2020, 9:44 a.m. UTC | #1
24/06/2020 12:20, Harman Kalra:
> Found an issue while using RTE_ALIGN_MUL_NEAR with an
> expression, like as passed in estimate_tsc_freq().
> RTE_ALIGN_MUL_FLOOR resulted in unexpected value as
> parathesis are required to evaluate an expression.
> 
> Fixes: 5120203d753f ("eal: add macros to align value to multiple")
> Cc: stable@dpdk.org
> 
> Signed-off-by: Harman Kalra <hkalra@marvell.com>

Applied, thanks

Patch
diff mbox series

diff --git a/lib/librte_eal/include/rte_common.h b/lib/librte_eal/include/rte_common.h
index 0843ce69e..0d834001c 100644
--- a/lib/librte_eal/include/rte_common.h
+++ b/lib/librte_eal/include/rte_common.h
@@ -295,7 +295,7 @@  static void __attribute__((destructor(RTE_PRIO(prio)), used)) func(void)
  * than the first parameter.
  */
 #define RTE_ALIGN_MUL_CEIL(v, mul) \
-	(((v + (typeof(v))(mul) - 1) / ((typeof(v))(mul))) * (typeof(v))(mul))
+	((((v) + (typeof(v))(mul) - 1) / ((typeof(v))(mul))) * (typeof(v))(mul))
 
 /**
  * Macro to align a value to the multiple of given value. The resultant
@@ -303,7 +303,7 @@  static void __attribute__((destructor(RTE_PRIO(prio)), used)) func(void)
  * than the first parameter.
  */
 #define RTE_ALIGN_MUL_FLOOR(v, mul) \
-	((v / ((typeof(v))(mul))) * (typeof(v))(mul))
+	(((v) / ((typeof(v))(mul))) * (typeof(v))(mul))
 
 /**
  * Macro to align value to the nearest multiple of the given value.
@@ -314,7 +314,7 @@  static void __attribute__((destructor(RTE_PRIO(prio)), used)) func(void)
 	({							\
 		typeof(v) ceil = RTE_ALIGN_MUL_CEIL(v, mul);	\
 		typeof(v) floor = RTE_ALIGN_MUL_FLOOR(v, mul);	\
-		(ceil - v) > (v - floor) ? floor : ceil;	\
+		(ceil - (v)) > ((v) - floor) ? floor : ceil;	\
 	})
 
 /**