From: Ahmad Fatoum <a.fatoum@pengutronix.de>
To: barebox@lists.infradead.org
Cc: Ahmad Fatoum <a.fatoum@pengutronix.de>
Subject: [PATCH v2] include: linux/iopoll.h: silence warning when timeout_us contains *
Date: Wed, 11 Jan 2023 08:49:57 +0100 [thread overview]
Message-ID: <20230111074957.897629-1-a.fatoum@pengutronix.de> (raw)
We evaluate timeout_us for truthiness to determine whether we are
entering an infinite poll loop. When timeout_us contains a
multiplication, GCC will warn about it and suggest replacing the *
with &&. Silence this warning by comparing directly against 0.
Signed-off-by: Ahmad Fatoum <a.fatoum@pengutronix.de>
---
v1 -> v2:
- squash change adding parens around timeout_us macro arg
---
include/linux/iopoll.h | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/include/linux/iopoll.h b/include/linux/iopoll.h
index 8bf912e173b3..96b17dee48c9 100644
--- a/include/linux/iopoll.h
+++ b/include/linux/iopoll.h
@@ -32,13 +32,13 @@
#define read_poll_timeout(op, val, cond, timeout_us, args...) \
({ \
uint64_t start; \
- if (!IN_PBL && timeout_us) \
+ if (!IN_PBL && (timeout_us) != 0) \
start = get_time_ns(); \
for (;;) { \
(val) = op(args); \
if (cond) \
break; \
- if (!IN_PBL && timeout_us && \
+ if (!IN_PBL && (timeout_us) != 0 && \
is_timeout(start, ((timeout_us) * USECOND))) { \
(val) = op(args); \
break; \
--
2.30.2
next reply other threads:[~2023-01-11 7:53 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-01-11 7:49 Ahmad Fatoum [this message]
2023-01-11 7:58 ` Sascha Hauer
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