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* [PATCH] arm64: arch_timer: mark errata handlers as __maybe_unused
@ 2017-04-19 17:37 Arnd Bergmann
  2017-04-19 18:03 ` Marc Zyngier
                   ` (2 more replies)
  0 siblings, 3 replies; 4+ messages in thread
From: Arnd Bergmann @ 2017-04-19 17:37 UTC (permalink / raw)
  To: Mark Rutland, Marc Zyngier, Daniel Lezcano, Thomas Gleixner
  Cc: Arnd Bergmann, Christoffer Dall, Will Deacon, linux-arm-kernel,
	linux-kernel

In some rare randconfig builds, we end up with two functions being entirely
unused:

drivers/clocksource/arm_arch_timer.c:342:12: error: 'erratum_set_next_event_tval_phys' defined but not used [-Werror=unused-function]
 static int erratum_set_next_event_tval_phys(unsigned long evt,
drivers/clocksource/arm_arch_timer.c:335:12: error: 'erratum_set_next_event_tval_virt' defined but not used [-Werror=unused-function]
 static int erratum_set_next_event_tval_virt(unsigned long evt,

We could add an #ifdef around them, but we would already have to check for
several symbols there and there is a chance this would get more complicated
over time, so marking them as __maybe_unused is the simplest way to avoid the
harmless warnings.

Fixes: 01d3e3ff2608 ("arm64: arch_timer: Rework the set_next_event workarounds")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
---
 drivers/clocksource/arm_arch_timer.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/clocksource/arm_arch_timer.c b/drivers/clocksource/arm_arch_timer.c
index 74183a7315ac..968ca3a9ee36 100644
--- a/drivers/clocksource/arm_arch_timer.c
+++ b/drivers/clocksource/arm_arch_timer.c
@@ -332,14 +332,14 @@ static void erratum_set_next_event_tval_generic(const int access, unsigned long
 	arch_timer_reg_write(access, ARCH_TIMER_REG_CTRL, ctrl, clk);
 }
 
-static int erratum_set_next_event_tval_virt(unsigned long evt,
+static __maybe_unused int erratum_set_next_event_tval_virt(unsigned long evt,
 					    struct clock_event_device *clk)
 {
 	erratum_set_next_event_tval_generic(ARCH_TIMER_VIRT_ACCESS, evt, clk);
 	return 0;
 }
 
-static int erratum_set_next_event_tval_phys(unsigned long evt,
+static __maybe_unused int erratum_set_next_event_tval_phys(unsigned long evt,
 					    struct clock_event_device *clk)
 {
 	erratum_set_next_event_tval_generic(ARCH_TIMER_PHYS_ACCESS, evt, clk);
-- 
2.9.0

^ permalink raw reply	[flat|nested] 4+ messages in thread

* Re: [PATCH] arm64: arch_timer: mark errata handlers as __maybe_unused
  2017-04-19 17:37 [PATCH] arm64: arch_timer: mark errata handlers as __maybe_unused Arnd Bergmann
@ 2017-04-19 18:03 ` Marc Zyngier
  2017-04-19 18:12 ` Daniel Lezcano
  2017-04-20 13:14 ` [tip:timers/core] arm64/arch_timer: Mark " tip-bot for Arnd Bergmann
  2 siblings, 0 replies; 4+ messages in thread
From: Marc Zyngier @ 2017-04-19 18:03 UTC (permalink / raw)
  To: Arnd Bergmann, Mark Rutland, Daniel Lezcano, Thomas Gleixner
  Cc: Christoffer Dall, Will Deacon, linux-arm-kernel, linux-kernel

On 19/04/17 18:37, Arnd Bergmann wrote:
> In some rare randconfig builds, we end up with two functions being entirely
> unused:
> 
> drivers/clocksource/arm_arch_timer.c:342:12: error: 'erratum_set_next_event_tval_phys' defined but not used [-Werror=unused-function]
>  static int erratum_set_next_event_tval_phys(unsigned long evt,
> drivers/clocksource/arm_arch_timer.c:335:12: error: 'erratum_set_next_event_tval_virt' defined but not used [-Werror=unused-function]
>  static int erratum_set_next_event_tval_virt(unsigned long evt,
> 
> We could add an #ifdef around them, but we would already have to check for
> several symbols there and there is a chance this would get more complicated
> over time, so marking them as __maybe_unused is the simplest way to avoid the
> harmless warnings.
> 
> Fixes: 01d3e3ff2608 ("arm64: arch_timer: Rework the set_next_event workarounds")
> Signed-off-by: Arnd Bergmann <arnd@arndb.de>

Ah, well spotted. You need CONFIG_ARM64_ERRATUM_858921, but none of
CONFIG_HISILICON_ERRATUM_161010101 or CONFIG_FSL_ERRATUM_A008585.
Dreadful stuff.

Acked-by: Marc Zyngier <marc.zyngier@arm.com>

	M.
-- 
Jazz is not dead. It just smells funny...

^ permalink raw reply	[flat|nested] 4+ messages in thread

* Re: [PATCH] arm64: arch_timer: mark errata handlers as __maybe_unused
  2017-04-19 17:37 [PATCH] arm64: arch_timer: mark errata handlers as __maybe_unused Arnd Bergmann
  2017-04-19 18:03 ` Marc Zyngier
@ 2017-04-19 18:12 ` Daniel Lezcano
  2017-04-20 13:14 ` [tip:timers/core] arm64/arch_timer: Mark " tip-bot for Arnd Bergmann
  2 siblings, 0 replies; 4+ messages in thread
From: Daniel Lezcano @ 2017-04-19 18:12 UTC (permalink / raw)
  To: Arnd Bergmann
  Cc: Mark Rutland, Marc Zyngier, Thomas Gleixner, Christoffer Dall,
	Will Deacon, linux-arm-kernel, linux-kernel

On Wed, Apr 19, 2017 at 07:37:09PM +0200, Arnd Bergmann wrote:
> In some rare randconfig builds, we end up with two functions being entirely
> unused:
> 
> drivers/clocksource/arm_arch_timer.c:342:12: error: 'erratum_set_next_event_tval_phys' defined but not used [-Werror=unused-function]
>  static int erratum_set_next_event_tval_phys(unsigned long evt,
> drivers/clocksource/arm_arch_timer.c:335:12: error: 'erratum_set_next_event_tval_virt' defined but not used [-Werror=unused-function]
>  static int erratum_set_next_event_tval_virt(unsigned long evt,
> 
> We could add an #ifdef around them, but we would already have to check for
> several symbols there and there is a chance this would get more complicated
> over time, so marking them as __maybe_unused is the simplest way to avoid the
> harmless warnings.
> 
> Fixes: 01d3e3ff2608 ("arm64: arch_timer: Rework the set_next_event workarounds")
> Signed-off-by: Arnd Bergmann <arnd@arndb.de>
> ---

Acked-by: Daniel Lezcano <daniel.lezcano@linaro.org>

^ permalink raw reply	[flat|nested] 4+ messages in thread

* [tip:timers/core] arm64/arch_timer: Mark errata handlers as __maybe_unused
  2017-04-19 17:37 [PATCH] arm64: arch_timer: mark errata handlers as __maybe_unused Arnd Bergmann
  2017-04-19 18:03 ` Marc Zyngier
  2017-04-19 18:12 ` Daniel Lezcano
@ 2017-04-20 13:14 ` tip-bot for Arnd Bergmann
  2 siblings, 0 replies; 4+ messages in thread
From: tip-bot for Arnd Bergmann @ 2017-04-20 13:14 UTC (permalink / raw)
  To: linux-tip-commits
  Cc: mingo, linux-kernel, will.deacon, hpa, daniel.lezcano,
	marc.zyngier, mark.rutland, arnd, tglx, christoffer.dall

Commit-ID:  eb64522100a1d4adc89bce11b935a30c4401e234
Gitweb:     http://git.kernel.org/tip/eb64522100a1d4adc89bce11b935a30c4401e234
Author:     Arnd Bergmann <arnd@arndb.de>
AuthorDate: Wed, 19 Apr 2017 19:37:09 +0200
Committer:  Thomas Gleixner <tglx@linutronix.de>
CommitDate: Thu, 20 Apr 2017 14:56:59 +0200

arm64/arch_timer: Mark errata handlers as __maybe_unused

In some rare randconfig builds, we end up with two functions being entirely
unused:

drivers/clocksource/arm_arch_timer.c:342:12: error: 'erratum_set_next_event_tval_phys' defined but not used [-Werror=unused-function]
 static int erratum_set_next_event_tval_phys(unsigned long evt,
drivers/clocksource/arm_arch_timer.c:335:12: error: 'erratum_set_next_event_tval_virt' defined but not used [-Werror=unused-function]
 static int erratum_set_next_event_tval_virt(unsigned long evt,

We could add an #ifdef around them, but we would already have to check for
several symbols there and there is a chance this would get more complicated
over time, so marking them as __maybe_unused is the simplest way to avoid the
harmless warnings.

Fixes: 01d3e3ff2608 ("arm64: arch_timer: Rework the set_next_event workarounds")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Marc Zyngier <marc.zyngier@arm.com>
Acked-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Will Deacon <will.deacon@arm.com>
Cc: linux-arm-kernel@lists.infradead.org
Cc: Christoffer Dall <christoffer.dall@linaro.org>
Link: http://lkml.kernel.org/r/20170419173737.3846098-1-arnd@arndb.de
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

---
 drivers/clocksource/arm_arch_timer.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/clocksource/arm_arch_timer.c b/drivers/clocksource/arm_arch_timer.c
index 2208fa4..a1fb918 100644
--- a/drivers/clocksource/arm_arch_timer.c
+++ b/drivers/clocksource/arm_arch_timer.c
@@ -324,14 +324,14 @@ static void erratum_set_next_event_tval_generic(const int access, unsigned long
 	arch_timer_reg_write(access, ARCH_TIMER_REG_CTRL, ctrl, clk);
 }
 
-static int erratum_set_next_event_tval_virt(unsigned long evt,
+static __maybe_unused int erratum_set_next_event_tval_virt(unsigned long evt,
 					    struct clock_event_device *clk)
 {
 	erratum_set_next_event_tval_generic(ARCH_TIMER_VIRT_ACCESS, evt, clk);
 	return 0;
 }
 
-static int erratum_set_next_event_tval_phys(unsigned long evt,
+static __maybe_unused int erratum_set_next_event_tval_phys(unsigned long evt,
 					    struct clock_event_device *clk)
 {
 	erratum_set_next_event_tval_generic(ARCH_TIMER_PHYS_ACCESS, evt, clk);

^ permalink raw reply	[flat|nested] 4+ messages in thread

end of thread, other threads:[~2017-04-20 13:16 UTC | newest]

Thread overview: 4+ messages (download: mbox.gz / follow: Atom feed)
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2017-04-19 17:37 [PATCH] arm64: arch_timer: mark errata handlers as __maybe_unused Arnd Bergmann
2017-04-19 18:03 ` Marc Zyngier
2017-04-19 18:12 ` Daniel Lezcano
2017-04-20 13:14 ` [tip:timers/core] arm64/arch_timer: Mark " tip-bot for Arnd Bergmann

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