From 489d95995850301e3ae622327cd322f4b9077bbd Mon Sep 17 00:00:00 2001 From: Andrew Morton Date: Tue, 18 Feb 2003 05:28:55 -0800 Subject: [PATCH] [PATCH] consolidate and cleanup profiling code. Patch from Nikita Danilov this moves functions from identical per-architecture arch/*/kernel/profile.c into generic kernel/profile.c. Also, identical {x86,parisc,ppc64,sparc64}_profile_hook()'s are all replaced by the single kernel/profile.c:profile_hook(), which is #defined to noop in include/linux/profile.h if CONFIG_PROFILING is not set. --- arch/i386/kernel/Makefile | 1 - arch/i386/kernel/i386_ksyms.c | 2 -- arch/i386/kernel/profile.c | 45 ----------------------------- arch/parisc/kernel/Makefile | 1 - arch/parisc/kernel/parisc_ksyms.c | 5 ---- arch/parisc/kernel/profile.c | 43 --------------------------- arch/parisc/kernel/time.c | 6 +--- arch/ppc64/kernel/Makefile | 1 - arch/ppc64/kernel/ppc_ksyms.c | 5 ---- arch/ppc64/kernel/profile.c | 42 --------------------------- arch/ppc64/kernel/time.c | 5 +--- arch/sparc64/kernel/Makefile | 1 - arch/sparc64/kernel/profile.c | 42 --------------------------- arch/sparc64/kernel/sparc64_ksyms.c | 5 ---- arch/sparc64/kernel/time.c | 5 +--- arch/x86_64/kernel/Makefile | 2 -- arch/x86_64/kernel/profile.c | 45 ----------------------------- arch/x86_64/kernel/x8664_ksyms.c | 2 -- include/asm-i386/hw_irq.h | 26 +---------------- include/asm-parisc/irq.h | 17 ----------- include/asm-ppc64/hw_irq.h | 21 -------------- include/asm-sparc64/irq.h | 21 -------------- include/asm-x86_64/hw_irq.h | 26 ++--------------- include/linux/profile.h | 20 ++++++++++++- kernel/profile.c | 33 +++++++++++++++++++++ 25 files changed, 58 insertions(+), 364 deletions(-) delete mode 100644 arch/i386/kernel/profile.c delete mode 100644 arch/parisc/kernel/profile.c delete mode 100644 arch/ppc64/kernel/profile.c delete mode 100644 arch/sparc64/kernel/profile.c delete mode 100644 arch/x86_64/kernel/profile.c diff --git a/arch/i386/kernel/Makefile b/arch/i386/kernel/Makefile index c8304c9cff236..02e8222ddf371 100644 --- a/arch/i386/kernel/Makefile +++ b/arch/i386/kernel/Makefile @@ -24,7 +24,6 @@ obj-$(CONFIG_X86_LOCAL_APIC) += apic.o nmi.o obj-$(CONFIG_X86_IO_APIC) += io_apic.o obj-$(CONFIG_SOFTWARE_SUSPEND) += suspend.o suspend_asm.o obj-$(CONFIG_X86_NUMAQ) += numaq.o -obj-$(CONFIG_PROFILING) += profile.o obj-$(CONFIG_EDD) += edd.o obj-$(CONFIG_MODULES) += module.o obj-y += sysenter.o diff --git a/arch/i386/kernel/i386_ksyms.c b/arch/i386/kernel/i386_ksyms.c index 93244d036138b..304d5180a9b7e 100644 --- a/arch/i386/kernel/i386_ksyms.c +++ b/arch/i386/kernel/i386_ksyms.c @@ -183,8 +183,6 @@ EXPORT_SYMBOL(get_wchan); EXPORT_SYMBOL(rtc_lock); -EXPORT_SYMBOL_GPL(register_profile_notifier); -EXPORT_SYMBOL_GPL(unregister_profile_notifier); EXPORT_SYMBOL_GPL(set_nmi_callback); EXPORT_SYMBOL_GPL(unset_nmi_callback); diff --git a/arch/i386/kernel/profile.c b/arch/i386/kernel/profile.c deleted file mode 100644 index 334af20585cb4..0000000000000 --- a/arch/i386/kernel/profile.c +++ /dev/null @@ -1,45 +0,0 @@ -/* - * linux/arch/i386/kernel/profile.c - * - * (C) 2002 John Levon - * - */ - -#include -#include -#include -#include -#include - -static struct notifier_block * profile_listeners; -static rwlock_t profile_lock = RW_LOCK_UNLOCKED; - -int register_profile_notifier(struct notifier_block * nb) -{ - int err; - write_lock_irq(&profile_lock); - err = notifier_chain_register(&profile_listeners, nb); - write_unlock_irq(&profile_lock); - return err; -} - - -int unregister_profile_notifier(struct notifier_block * nb) -{ - int err; - write_lock_irq(&profile_lock); - err = notifier_chain_unregister(&profile_listeners, nb); - write_unlock_irq(&profile_lock); - return err; -} - - -void x86_profile_hook(struct pt_regs * regs) -{ - /* we would not even need this lock if - * we had a global cli() on register/unregister - */ - read_lock(&profile_lock); - notifier_call_chain(&profile_listeners, 0, regs); - read_unlock(&profile_lock); -} diff --git a/arch/parisc/kernel/Makefile b/arch/parisc/kernel/Makefile index 709d1db4b93bf..5edb1d848545a 100644 --- a/arch/parisc/kernel/Makefile +++ b/arch/parisc/kernel/Makefile @@ -16,7 +16,6 @@ obj-y := cache.o pacache.o setup.o traps.o time.o irq.o \ processor.o pdc_chassis.o obj-$(CONFIG_SMP) += smp.o -obj-$(CONFIG_PROFILING) += profile.o obj-$(CONFIG_PA11) += pci-dma.o obj-$(CONFIG_PCI) += pci.o obj-$(CONFIG_MODULES) += module.o diff --git a/arch/parisc/kernel/parisc_ksyms.c b/arch/parisc/kernel/parisc_ksyms.c index 9813d46787901..dc7048b997244 100644 --- a/arch/parisc/kernel/parisc_ksyms.c +++ b/arch/parisc/kernel/parisc_ksyms.c @@ -207,10 +207,5 @@ extern void $$dyncall(void); EXPORT_SYMBOL_NOVERS($$dyncall); #endif -#ifdef CONFIG_PROFILING -EXPORT_SYMBOL_GPL(register_profile_notifier); -EXPORT_SYMBOL_GPL(unregister_profile_notifier); -#endif - #include EXPORT_SYMBOL_NOVERS(vmalloc_start); diff --git a/arch/parisc/kernel/profile.c b/arch/parisc/kernel/profile.c deleted file mode 100644 index ad72a5364ec28..0000000000000 --- a/arch/parisc/kernel/profile.c +++ /dev/null @@ -1,43 +0,0 @@ -/* arch/parisc/kernel/profile.c - * - * Almost entirely copied from ppc64 which is: - * (C) 2002 John Levon - */ - -#include -#include -#include -#include - -static struct notifier_block *profile_listeners; -static rwlock_t profile_lock = RW_LOCK_UNLOCKED; - -int register_profile_notifier(struct notifier_block *nb) -{ - int err; - - write_lock_irq(&profile_lock); - err = notifier_chain_register(&profile_listeners, nb); - write_unlock_irq(&profile_lock); - - return err; -} - -int unregister_profile_notifier(struct notifier_block *nb) -{ - int err; - - write_lock_irq(&profile_lock); - err = notifier_chain_unregister(&profile_listeners, nb); - write_unlock_irq(&profile_lock); - - return err; -} - -void parisc_profile_hook(struct pt_regs *regs) -{ - read_lock(&profile_lock); - notifier_call_chain(&profile_listeners, 0, regs); - read_unlock(&profile_lock); -} - diff --git a/arch/parisc/kernel/time.c b/arch/parisc/kernel/time.c index 96cefb43ada67..f45c627843334 100644 --- a/arch/parisc/kernel/time.c +++ b/arch/parisc/kernel/time.c @@ -51,11 +51,7 @@ parisc_do_profile(struct pt_regs *regs) extern unsigned long prof_cpu_mask; extern char _stext; -#ifdef CONFIG_PROFILING - extern void parisc_profile_hook(struct pt_regs *); - - parisc_profile_hook(regs); -#endif + profile_hook(regs); if (user_mode(regs)) return; diff --git a/arch/ppc64/kernel/Makefile b/arch/ppc64/kernel/Makefile index 22f66a7b062d0..73267d76039a4 100644 --- a/arch/ppc64/kernel/Makefile +++ b/arch/ppc64/kernel/Makefile @@ -27,7 +27,6 @@ obj-y += open_pic.o xics.o pSeries_htab.o rtas.o \ obj-$(CONFIG_RTAS_FLASH) += rtas_flash.o obj-$(CONFIG_SMP) += smp.o -obj-$(CONFIG_PROFILING) += profile.o obj-$(CONFIG_MODULES) += module.o ppc_ksyms.o obj-$(CONFIG_PPC_RTAS) += rtas-proc.o obj-$(CONFIG_SCANLOG) += scanlog.o diff --git a/arch/ppc64/kernel/ppc_ksyms.c b/arch/ppc64/kernel/ppc_ksyms.c index ded44b28a5c54..a69eda2d5fcd6 100644 --- a/arch/ppc64/kernel/ppc_ksyms.c +++ b/arch/ppc64/kernel/ppc_ksyms.c @@ -232,8 +232,3 @@ EXPORT_SYMBOL(debugger_fault_handler); #endif EXPORT_SYMBOL(tb_ticks_per_usec); - -#ifdef CONFIG_PROFILING -EXPORT_SYMBOL_GPL(register_profile_notifier); -EXPORT_SYMBOL_GPL(unregister_profile_notifier); -#endif diff --git a/arch/ppc64/kernel/profile.c b/arch/ppc64/kernel/profile.c deleted file mode 100644 index b199e422cd6a6..0000000000000 --- a/arch/ppc64/kernel/profile.c +++ /dev/null @@ -1,42 +0,0 @@ -/* - * linux/arch/i386/kernel/profile.c - * - * (C) 2002 John Levon - * - */ - -#include -#include -#include -#include -#include - -static struct notifier_block * profile_listeners; -static rwlock_t profile_lock = RW_LOCK_UNLOCKED; - -int register_profile_notifier(struct notifier_block * nb) -{ - int err; - write_lock_irq(&profile_lock); - err = notifier_chain_register(&profile_listeners, nb); - write_unlock_irq(&profile_lock); - return err; -} - - -int unregister_profile_notifier(struct notifier_block * nb) -{ - int err; - write_lock_irq(&profile_lock); - err = notifier_chain_unregister(&profile_listeners, nb); - write_unlock_irq(&profile_lock); - return err; -} - - -void ppc64_profile_hook(struct pt_regs * regs) -{ - read_lock(&profile_lock); - notifier_call_chain(&profile_listeners, 0, regs); - read_unlock(&profile_lock); -} diff --git a/arch/ppc64/kernel/time.c b/arch/ppc64/kernel/time.c index 5592e33279eb1..23d0a92027100 100644 --- a/arch/ppc64/kernel/time.c +++ b/arch/ppc64/kernel/time.c @@ -110,11 +110,8 @@ static inline void ppc64_do_profile(struct pt_regs *regs) unsigned long nip; extern unsigned long prof_cpu_mask; extern char _stext; -#ifdef CONFIG_PROFILING - extern void ppc64_profile_hook(struct pt_regs *); - ppc64_profile_hook(regs); -#endif + profile_hook(regs); if (user_mode(regs)) return; diff --git a/arch/sparc64/kernel/Makefile b/arch/sparc64/kernel/Makefile index 26324b58bc19b..66ae7692d8741 100644 --- a/arch/sparc64/kernel/Makefile +++ b/arch/sparc64/kernel/Makefile @@ -15,7 +15,6 @@ obj-y := process.o setup.o cpu.o idprom.o \ obj-$(CONFIG_PCI) += ebus.o isa.o pci_common.o pci_iommu.o \ pci_psycho.o pci_sabre.o pci_schizo.o obj-$(CONFIG_SMP) += smp.o trampoline.o -obj-$(CONFIG_PROFILING) += profile.o obj-$(CONFIG_SPARC32_COMPAT) += sys32.o sys_sparc32.o signal32.o ioctl32.o obj-$(CONFIG_BINFMT_ELF32) += binfmt_elf32.o obj-$(CONFIG_BINFMT_AOUT32) += binfmt_aout32.o diff --git a/arch/sparc64/kernel/profile.c b/arch/sparc64/kernel/profile.c deleted file mode 100644 index 3c1f058293333..0000000000000 --- a/arch/sparc64/kernel/profile.c +++ /dev/null @@ -1,42 +0,0 @@ -/* arch/sparc64/kernel/profile.c - * - * Almost entirely copied from ppc64 which is: - * (C) 2002 John Levon - */ - -#include -#include -#include -#include - -static struct notifier_block *profile_listeners; -static rwlock_t profile_lock = RW_LOCK_UNLOCKED; - -int register_profile_notifier(struct notifier_block *nb) -{ - int err; - - write_lock_irq(&profile_lock); - err = notifier_chain_register(&profile_listeners, nb); - write_unlock_irq(&profile_lock); - - return err; -} - -int unregister_profile_notifier(struct notifier_block *nb) -{ - int err; - - write_lock_irq(&profile_lock); - err = notifier_chain_unregister(&profile_listeners, nb); - write_unlock_irq(&profile_lock); - - return err; -} - -void sparc64_profile_hook(struct pt_regs *regs) -{ - read_lock(&profile_lock); - notifier_call_chain(&profile_listeners, 0, regs); - read_unlock(&profile_lock); -} diff --git a/arch/sparc64/kernel/sparc64_ksyms.c b/arch/sparc64/kernel/sparc64_ksyms.c index 7a472a9cb785d..d75cbaa430037 100644 --- a/arch/sparc64/kernel/sparc64_ksyms.c +++ b/arch/sparc64/kernel/sparc64_ksyms.c @@ -374,8 +374,3 @@ EXPORT_SYMBOL(do_BUG); /* for ns8703 */ EXPORT_SYMBOL(ns87303_lock); - -#ifdef CONFIG_PROFILING -EXPORT_SYMBOL_GPL(register_profile_notifier); -EXPORT_SYMBOL_GPL(unregister_profile_notifier); -#endif diff --git a/arch/sparc64/kernel/time.c b/arch/sparc64/kernel/time.c index a7163a393bb47..3d716914b1584 100644 --- a/arch/sparc64/kernel/time.c +++ b/arch/sparc64/kernel/time.c @@ -88,11 +88,8 @@ void sparc64_do_profile(struct pt_regs *regs) { unsigned long pc = regs->tpc; unsigned long o7 = regs->u_regs[UREG_RETPC]; -#ifdef CONFIG_PROFILING - extern void sparc64_profile_hook(struct pt_regs *); - sparc64_profile_hook(regs); -#endif + profile_hook(regs); if (user_mode(regs)) return; diff --git a/arch/x86_64/kernel/Makefile b/arch/x86_64/kernel/Makefile index b9adc70bb4237..c4b84bae061c2 100644 --- a/arch/x86_64/kernel/Makefile +++ b/arch/x86_64/kernel/Makefile @@ -22,8 +22,6 @@ obj-$(CONFIG_EARLY_PRINTK) += early_printk.o obj-$(CONFIG_GART_IOMMU) += pci-gart.o aperture.o obj-$(CONFIG_DUMMY_IOMMU) += pci-nommu.o obj-$(CONFIG_MODULES) += module.o -obj-$(CONFIG_PROFILING) += profile.o - $(obj)/bootflag.c: @ln -sf ../../i386/kernel/bootflag.c $(obj)/bootflag.c diff --git a/arch/x86_64/kernel/profile.c b/arch/x86_64/kernel/profile.c deleted file mode 100644 index 781c2d8274791..0000000000000 --- a/arch/x86_64/kernel/profile.c +++ /dev/null @@ -1,45 +0,0 @@ -/* - * linux/arch/x86_64/kernel/profile.c - * - * (C) 2002 John Levon - * - */ - -#include -#include -#include -#include -#include - -static struct notifier_block * profile_listeners; -static rwlock_t profile_lock = RW_LOCK_UNLOCKED; - -int register_profile_notifier(struct notifier_block * nb) -{ - int err; - write_lock_irq(&profile_lock); - err = notifier_chain_register(&profile_listeners, nb); - write_unlock_irq(&profile_lock); - return err; -} - - -int unregister_profile_notifier(struct notifier_block * nb) -{ - int err; - write_lock_irq(&profile_lock); - err = notifier_chain_unregister(&profile_listeners, nb); - write_unlock_irq(&profile_lock); - return err; -} - - -void x86_profile_hook(struct pt_regs * regs) -{ - /* we would not even need this lock if - * we had a global cli() on register/unregister - */ - read_lock(&profile_lock); - notifier_call_chain(&profile_listeners, 0, regs); - read_unlock(&profile_lock); -} diff --git a/arch/x86_64/kernel/x8664_ksyms.c b/arch/x86_64/kernel/x8664_ksyms.c index 2cb3459d03376..eac555686a560 100644 --- a/arch/x86_64/kernel/x8664_ksyms.c +++ b/arch/x86_64/kernel/x8664_ksyms.c @@ -132,8 +132,6 @@ EXPORT_SYMBOL(get_wchan); EXPORT_SYMBOL(rtc_lock); -EXPORT_SYMBOL_GPL(register_profile_notifier); -EXPORT_SYMBOL_GPL(unregister_profile_notifier); EXPORT_SYMBOL_GPL(set_nmi_callback); EXPORT_SYMBOL_GPL(unset_nmi_callback); diff --git a/include/asm-i386/hw_irq.h b/include/asm-i386/hw_irq.h index a20ce49418644..520821cb5eaf1 100644 --- a/include/asm-i386/hw_irq.h +++ b/include/asm-i386/hw_irq.h @@ -76,11 +76,8 @@ static inline void x86_do_profile(struct pt_regs * regs) { unsigned long eip; extern unsigned long prof_cpu_mask; -#ifdef CONFIG_PROFILING - extern void x86_profile_hook(struct pt_regs *); - x86_profile_hook(regs); -#endif + profile_hook(regs); if (user_mode(regs)) return; @@ -109,27 +106,6 @@ static inline void x86_do_profile(struct pt_regs * regs) atomic_inc((atomic_t *)&prof_buffer[eip]); } -struct notifier_block; - -#ifdef CONFIG_PROFILING - -int register_profile_notifier(struct notifier_block * nb); -int unregister_profile_notifier(struct notifier_block * nb); - -#else - -static inline int register_profile_notifier(struct notifier_block * nb) -{ - return -ENOSYS; -} - -static inline int unregister_profile_notifier(struct notifier_block * nb) -{ - return -ENOSYS; -} - -#endif /* CONFIG_PROFILING */ - #if defined(CONFIG_X86_IO_APIC) && defined(CONFIG_SMP) static inline void hw_resend_irq(struct hw_interrupt_type *h, unsigned int i) { diff --git a/include/asm-parisc/irq.h b/include/asm-parisc/irq.h index 90be00a837325..5cf1a18253bae 100644 --- a/include/asm-parisc/irq.h +++ b/include/asm-parisc/irq.h @@ -95,21 +95,4 @@ extern unsigned long txn_alloc_addr(int); /* soft power switch support (power.c) */ extern struct tasklet_struct power_tasklet; -struct notifier_block; - -#ifdef CONFIG_PROFILING -int register_profile_notifier(struct notifier_block *nb); -int unregister_profile_notifier(struct notifier_block *nb); -#else -static inline int register_profile_notifier(struct notifier_block *nb) -{ - return -ENOSYS; -} - -static inline int unregister_profile_notifier(struct notifier_block *nb) -{ - return -ENOSYS; -} -#endif - #endif /* _ASM_PARISC_IRQ_H */ diff --git a/include/asm-ppc64/hw_irq.h b/include/asm-ppc64/hw_irq.h index ba0a72f1185d5..9b4ad1f7993f0 100644 --- a/include/asm-ppc64/hw_irq.h +++ b/include/asm-ppc64/hw_irq.h @@ -81,26 +81,5 @@ static inline void __do_save_and_cli(unsigned long *flags) struct hw_interrupt_type; static inline void hw_resend_irq(struct hw_interrupt_type *h, unsigned int i) {} -struct notifier_block; - -#ifdef CONFIG_PROFILING - -int register_profile_notifier(struct notifier_block * nb); -int unregister_profile_notifier(struct notifier_block * nb); - -#else - -static inline int register_profile_notifier(struct notifier_block * nb) -{ - return -ENOSYS; -} - -static inline int unregister_profile_notifier(struct notifier_block * nb) -{ - return -ENOSYS; -} - -#endif /* CONFIG_PROFILING */ - #endif /* _PPC64_HW_IRQ_H */ #endif /* __KERNEL__ */ diff --git a/include/asm-sparc64/irq.h b/include/asm-sparc64/irq.h index 6dc5ce5a78c0f..f2423a38eee4b 100644 --- a/include/asm-sparc64/irq.h +++ b/include/asm-sparc64/irq.h @@ -157,25 +157,4 @@ static __inline__ unsigned long get_softint(void) return retval; } -struct notifier_block; - -#ifdef CONFIG_PROFILING - -int register_profile_notifier(struct notifier_block *nb); -int unregister_profile_notifier(struct notifier_block *nb); - -#else - -static inline int register_profile_notifier(struct notifier_block *nb) -{ - return -ENOSYS; -} - -static inline int unregister_profile_notifier(struct notifier_block *nb) -{ - return -ENOSYS; -} - -#endif /* CONFIG_PROFILING */ - #endif diff --git a/include/asm-x86_64/hw_irq.h b/include/asm-x86_64/hw_irq.h index bb096fb7ab06f..567e01a52346e 100644 --- a/include/asm-x86_64/hw_irq.h +++ b/include/asm-x86_64/hw_irq.h @@ -135,11 +135,9 @@ static inline void x86_do_profile (struct pt_regs *regs) unsigned long rip; extern unsigned long prof_cpu_mask; extern char _stext; -#ifdef CONFIG_PROFILING - extern void x86_profile_hook(struct pt_regs *); - x86_profile_hook(regs); -#endif + profile_hook(regs); + if (user_mode(regs)) return; if (!prof_buffer) @@ -166,26 +164,6 @@ static inline void x86_do_profile (struct pt_regs *regs) atomic_inc((atomic_t *)&prof_buffer[rip]); } -struct notifier_block; - -#ifdef CONFIG_PROFILING - -int register_profile_notifier(struct notifier_block * nb); -int unregister_profile_notifier(struct notifier_block * nb); - -#else - -static inline int register_profile_notifier(struct notifier_block * nb) -{ - return -ENOSYS; -} - -static inline int unregister_profile_notifier(struct notifier_block * nb) -{ - return -ENOSYS; -} - -#endif /* CONFIG_PROFILING */ #ifdef CONFIG_SMP /*more of this file should probably be ifdefed SMP */ static inline void hw_resend_irq(struct hw_interrupt_type *h, unsigned int i) { if (IO_APIC_IRQ(i)) diff --git a/include/linux/profile.h b/include/linux/profile.h index 7ee46d4bb3cca..54c9b8b422af2 100644 --- a/include/linux/profile.h +++ b/include/linux/profile.h @@ -45,6 +45,12 @@ int profile_event_register(enum profile_type, struct notifier_block * n); int profile_event_unregister(enum profile_type, struct notifier_block * n); +int register_profile_notifier(struct notifier_block * nb); +int unregister_profile_notifier(struct notifier_block * nb); + +/* profiling hook activated on each timer interrupt */ +void profile_hook(struct pt_regs * regs); + #else static inline int profile_event_register(enum profile_type t, struct notifier_block * n) @@ -60,7 +66,19 @@ static inline int profile_event_unregister(enum profile_type t, struct notifier_ #define profile_exit_task(a) do { } while (0) #define profile_exec_unmap(a) do { } while (0) #define profile_exit_mmap(a) do { } while (0) - + +static inline int register_profile_notifier(struct notifier_block * nb) +{ + return -ENOSYS; +} + +static inline int unregister_profile_notifier(struct notifier_block * nb) +{ + return -ENOSYS; +} + +#define profile_hook(regs) do { } while (0) + #endif /* CONFIG_PROFILING */ #endif /* __KERNEL__ */ diff --git a/kernel/profile.c b/kernel/profile.c index 9f12f1d4013f3..4f6d22ce33f20 100644 --- a/kernel/profile.c +++ b/kernel/profile.c @@ -119,6 +119,39 @@ int profile_event_unregister(enum profile_type type, struct notifier_block * n) return err; } +static struct notifier_block * profile_listeners; +static rwlock_t profile_lock = RW_LOCK_UNLOCKED; + +int register_profile_notifier(struct notifier_block * nb) +{ + int err; + write_lock_irq(&profile_lock); + err = notifier_chain_register(&profile_listeners, nb); + write_unlock_irq(&profile_lock); + return err; +} + + +int unregister_profile_notifier(struct notifier_block * nb) +{ + int err; + write_lock_irq(&profile_lock); + err = notifier_chain_unregister(&profile_listeners, nb); + write_unlock_irq(&profile_lock); + return err; +} + + +void profile_hook(struct pt_regs * regs) +{ + read_lock(&profile_lock); + notifier_call_chain(&profile_listeners, 0, regs); + read_unlock(&profile_lock); +} + +EXPORT_SYMBOL_GPL(register_profile_notifier); +EXPORT_SYMBOL_GPL(unregister_profile_notifier); + #endif /* CONFIG_PROFILING */ EXPORT_SYMBOL_GPL(profile_event_register); -- 2.53.0