From: Bjorn Helgaas Date: Sun, 12 Jul 2015 23:11:38 +0000 (-0500) Subject: MIPS: Remove "weak" from get_c0_compare_int() declaration X-Git-Tag: firefly_0821_release~176^2~1148^2~108 X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=ec0b9d35d1fbf7e3a3eccc662ad641794d3685a5;p=firefly-linux-kernel-4.4.55.git MIPS: Remove "weak" from get_c0_compare_int() declaration Weak header file declarations are error-prone because they make every definition weak, and the linker chooses one based on link order (see 10629d711ed7 ("PCI: Remove __weak annotation from pcibios_get_phb_of_node decl")). get_c0_compare_int() is defined in several files. Each definition is weak, so I assume Kconfig prevents two or more from being included. The caller contains default code used when get_c0_compare_int() isn't defined at all. Add a weak get_c0_compare_int() definition with the default code and remove the weak annotation from the declaration. Then the platform implementations will be strong and will override the weak default. If multiple platforms are ever configured in, we'll get a link error instead of calling a random platform's implementation. Signed-off-by: Bjorn Helgaas Reviewed-by: James Hogan Cc: Andrew Bresticker Cc: linux-mips@linux-mips.org Cc: linux-kernel@vger.kernel.org Patchwork: https://patchwork.linux-mips.org/patch/10686/ Signed-off-by: Ralf Baechle --- diff --git a/arch/mips/include/asm/time.h b/arch/mips/include/asm/time.h index 8ab2874225c4..17d4cd20f18c 100644 --- a/arch/mips/include/asm/time.h +++ b/arch/mips/include/asm/time.h @@ -51,7 +51,7 @@ extern int __weak get_c0_perfcount_int(void); /* * Initialize the calling CPU's compare interrupt as clockevent device */ -extern unsigned int __weak get_c0_compare_int(void); +extern unsigned int get_c0_compare_int(void); extern int r4k_clockevent_init(void); static inline int mips_clockevent_init(void) diff --git a/arch/mips/kernel/cevt-r4k.c b/arch/mips/kernel/cevt-r4k.c index d70c4d893219..cc7cc46b58f7 100644 --- a/arch/mips/kernel/cevt-r4k.c +++ b/arch/mips/kernel/cevt-r4k.c @@ -174,6 +174,11 @@ int c0_compare_int_usable(void) return 1; } +unsigned int __weak get_c0_compare_int(void) +{ + return MIPS_CPU_IRQ_BASE + cp0_compare_irq; +} + int r4k_clockevent_init(void) { unsigned int cpu = smp_processor_id(); @@ -189,11 +194,9 @@ int r4k_clockevent_init(void) /* * With vectored interrupts things are getting platform specific. * get_c0_compare_int is a hook to allow a platform to return the - * interrupt number of it's liking. + * interrupt number of its liking. */ - irq = MIPS_CPU_IRQ_BASE + cp0_compare_irq; - if (get_c0_compare_int) - irq = get_c0_compare_int(); + irq = get_c0_compare_int(); cd = &per_cpu(mips_clockevent_device, cpu);