linux-kernel - [PATCH 5.15 127/247] m68knommu: fix undefined reference to `mach_get_rtc

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Message-Id: <20220613094926.812341729@linuxfoundation.org>
Date:   Mon, 13 Jun 2022 12:10:29 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, kernel test robot <lkp@...el.com>,
        Geert Uytterhoeven <geert@...ux-m68k.org>,
        Arnd Bergmann <arnd@...db.de>,
        Greg Ungerer <gerg@...ux-m68k.org>,
        Sasha Levin <sashal@...nel.org>
Subject: [PATCH 5.15 127/247] m68knommu: fix undefined reference to `mach_get_rtc_pll

From: Greg Ungerer <gerg@...ux-m68k.org>

[ Upstream commit 1300eec9e51f23c34c4487d2b06f58ca22e1ad3d ]

Configuring for a nommu classic m68k target and enabling the generic rtc
driver (CONFIG_RTC_DRV_GENERIC) will result in the following compile
error:

   m68k-linux-ld: arch/m68k/kernel/time.o: in function `rtc_ioctl':
   time.c:(.text+0x82): undefined reference to `mach_get_rtc_pll'
   m68k-linux-ld: time.c:(.text+0xbc): undefined reference to `mach_set_rtc_pll'
   m68k-linux-ld: time.c:(.text+0xf4): undefined reference to `mach_set_rtc_pll'

There are no definitions of "mach_set_rtc_pll" and "mach_get_rtc_pll" in the
nommu code paths. Move these definitions and the associated "mach_hwclk",
so that they are around their use case in time.c. This means they will
always be defined on the builds that require them, and not on those that
cannot use them - such as ColdFire (both with and without MMU enabled).

Reported-by: kernel test robot <lkp@...el.com>
Reviewed-by: Geert Uytterhoeven <geert@...ux-m68k.org>
Acked-by: Geert Uytterhoeven <geert@...ux-m68k.org>
Reviewed-by: Arnd Bergmann <arnd@...db.de>
Signed-off-by: Greg Ungerer <gerg@...ux-m68k.org>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 arch/m68k/kernel/setup_mm.c | 7 -------
 arch/m68k/kernel/setup_no.c | 1 -
 arch/m68k/kernel/time.c     | 9 +++++++++
 3 files changed, 9 insertions(+), 8 deletions(-)

diff --git a/arch/m68k/kernel/setup_mm.c b/arch/m68k/kernel/setup_mm.c
index 4b51bfd38e5f..f24410a54dcb 100644
--- a/arch/m68k/kernel/setup_mm.c
+++ b/arch/m68k/kernel/setup_mm.c
@@ -87,15 +87,8 @@ void (*mach_sched_init) (void) __initdata = NULL;
 void (*mach_init_IRQ) (void) __initdata = NULL;
 void (*mach_get_model) (char *model);
 void (*mach_get_hardware_list) (struct seq_file *m);
-/* machine dependent timer functions */
-int (*mach_hwclk) (int, struct rtc_time*);
-EXPORT_SYMBOL(mach_hwclk);
 unsigned int (*mach_get_ss)(void);
-int (*mach_get_rtc_pll)(struct rtc_pll_info *);
-int (*mach_set_rtc_pll)(struct rtc_pll_info *);
 EXPORT_SYMBOL(mach_get_ss);
-EXPORT_SYMBOL(mach_get_rtc_pll);
-EXPORT_SYMBOL(mach_set_rtc_pll);
 void (*mach_reset)( void );
 void (*mach_halt)( void );
 void (*mach_power_off)( void );
diff --git a/arch/m68k/kernel/setup_no.c b/arch/m68k/kernel/setup_no.c
index 5e4104f07a44..19eea73d3c17 100644
--- a/arch/m68k/kernel/setup_no.c
+++ b/arch/m68k/kernel/setup_no.c
@@ -50,7 +50,6 @@ char __initdata command_line[COMMAND_LINE_SIZE];
 
 /* machine dependent timer functions */
 void (*mach_sched_init)(void) __initdata = NULL;
-int (*mach_hwclk) (int, struct rtc_time*);
 
 /* machine dependent reboot functions */
 void (*mach_reset)(void);
diff --git a/arch/m68k/kernel/time.c b/arch/m68k/kernel/time.c
index 340ffeea0a9d..a97600b2af50 100644
--- a/arch/m68k/kernel/time.c
+++ b/arch/m68k/kernel/time.c
@@ -63,6 +63,15 @@ void timer_heartbeat(void)
 #endif /* CONFIG_HEARTBEAT */
 
 #ifdef CONFIG_M68KCLASSIC
+/* machine dependent timer functions */
+int (*mach_hwclk) (int, struct rtc_time*);
+EXPORT_SYMBOL(mach_hwclk);
+
+int (*mach_get_rtc_pll)(struct rtc_pll_info *);
+int (*mach_set_rtc_pll)(struct rtc_pll_info *);
+EXPORT_SYMBOL(mach_get_rtc_pll);
+EXPORT_SYMBOL(mach_set_rtc_pll);
+
 #if !IS_BUILTIN(CONFIG_RTC_DRV_GENERIC)
 void read_persistent_clock64(struct timespec64 *ts)
 {
-- 
2.35.1