diff options
author | Maciej W. Rozycki <macro@linux-mips.org> | 2018-10-02 02:08:49 +0100 |
---|---|---|
committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2018-11-13 11:08:51 -0800 |
commit | 65a060ca4bfc129bcdc1bdfbafda1396e2ce77ad (patch) | |
tree | 7a18aa3a6e5cd4b29a85ebfc7a9b30db2e003cc9 /drivers/rtc | |
parent | f3e5730821cffb21cc3f91883067f9b71871efdc (diff) |
rtc: cmos: Fix non-ACPI undefined reference to `hpet_rtc_interrupt'
commit d197a253855d2d8e507a003880aab35c4e2473db upstream.
Fix a commit 311ee9c151ad ("rtc: cmos: allow using ACPI for RTC alarm
instead of HPET") `rtc-cmos' regression causing a link error:
drivers/rtc/rtc-cmos.o: In function `cmos_platform_probe':
rtc-cmos.c:(.init.text+0x33c): undefined reference to `hpet_rtc_interrupt'
rtc-cmos.c:(.init.text+0x3f4): undefined reference to `hpet_rtc_interrupt'
with non-ACPI platforms using this driver. The cause is the change of
the condition guarding the use of `hpet_rtc_interrupt'.
Previously it was a call to `is_hpet_enabled'. That function is static
inline and has a hardcoded 0 result for non-ACPI platforms, which imply
!HPET_EMULATE_RTC. Consequently the compiler optimized the whole block
away including the reference to `hpet_rtc_interrupt', which never made
it to the link stage.
Now the guarding condition is a call to `use_hpet_alarm', which is not
static inline and therefore the compiler may not be able to prove that
it actually always returns 0 for non-ACPI platforms. Consequently the
build breaks with an unsatisfied reference, because `hpet_rtc_interrupt'
is nowhere defined at link time.
Fix the problem by marking `use_hpet_alarm' inline. As the `inline'
keyword serves as an optimization hint rather than a requirement the
compiler is still free to choose whether inlining will be beneficial or
not for ACPI platforms.
Signed-off-by: Maciej W. Rozycki <macro@linux-mips.org>
Fixes: 311ee9c151ad ("rtc: cmos: allow using ACPI for RTC alarm instead of HPET")
Cc: stable@vger.kernel.org # 4.18+
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/rtc')
-rw-r--r-- | drivers/rtc/rtc-cmos.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/rtc/rtc-cmos.c b/drivers/rtc/rtc-cmos.c index cd3a2411bc2f..1c98f845102c 100644 --- a/drivers/rtc/rtc-cmos.c +++ b/drivers/rtc/rtc-cmos.c @@ -167,7 +167,7 @@ static inline int hpet_unregister_irq_handler(irq_handler_t handler) #endif /* Don't use HPET for RTC Alarm event if ACPI Fixed event is used */ -static int use_hpet_alarm(void) +static inline int use_hpet_alarm(void) { return is_hpet_enabled() && !use_acpi_alarm; } |