[lkml]   [2015]   [Nov]   [16]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
Messages in this thread
Patch in this message
Subject[PATCH] clocksource: fsl: avoid harmless 64-bit warnings
The ftm_clockevent_init passes the value of "~0UL" into a function
that takes a 32-bit argument, which drops the upper 32 bits, as
gcc warns about on ARM64:

clocksource/fsl_ftm_timer.c: In function 'ftm_clockevent_init':
clocksource/fsl_ftm_timer.c:206:13: warning: large integer implicitly truncated to unsigned type [-Woverflow]

This was obviously unintended behavior, and is easily avoided by
using '~0u' as the integer literal, because that is 32-bit wide
on all architectures.

Signed-off-by: Arnd Bergmann <>

diff --git a/drivers/clocksource/fsl_ftm_timer.c b/drivers/clocksource/fsl_ftm_timer.c
index 10202f1fdfd7..517e1c7624d4 100644
--- a/drivers/clocksource/fsl_ftm_timer.c
+++ b/drivers/clocksource/fsl_ftm_timer.c
@@ -203,7 +203,7 @@ static int __init ftm_clockevent_init(unsigned long freq, int irq)
int err;

ftm_writel(0x00, priv->clkevt_base + FTM_CNTIN);
- ftm_writel(~0UL, priv->clkevt_base + FTM_MOD);
+ ftm_writel(~0u, priv->clkevt_base + FTM_MOD);


@@ -230,7 +230,7 @@ static int __init ftm_clocksource_init(unsigned long freq)
int err;

ftm_writel(0x00, priv->clksrc_base + FTM_CNTIN);
- ftm_writel(~0UL, priv->clksrc_base + FTM_MOD);
+ ftm_writel(~0u, priv->clksrc_base + FTM_MOD);


 \ /
  Last update: 2015-11-16 18:01    [W:0.035 / U:0.524 seconds]
©2003-2018 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site