/* * Copyright 2005, Red Hat, Inc., Ingo Molnar * Released under the General Public License (GPL). * * This file contains the spinlock/rwlock implementations for * DEBUG_SPINLOCK. */ #include #include #include #include #include #include void __raw_spin_lock_init(raw_spinlock_t *lock, const char *name, struct lock_class_key *key) { #ifdef CONFIG_DEBUG_LOCK_ALLOC /* * Make sure we are not reinitializing a held lock: */ debug_check_no_locks_freed((void *)lock, sizeof(*lock)); lockdep_init_map(&lock->dep_map, name, key, 0); #endif lock->raw_lock = (arch_spinlock_t)__ARCH_SPIN_LOCK_UNLOCKED; lock->magic = SPINLOCK_MAGIC; lock->owner = SPINLOCK_OWNER_INIT; lock->owner_cpu = -1; } EXPORT_SYMBOL(__raw_spin_lock_init); void __rwlock_init(rwlock_t *lock, const char *name, struct lock_class_key *key) { #ifdef CONFIG_DEBUG_LOCK_ALLOC /* * Make sure we are not reinitializing a held lock: */ debug_check_no_locks_freed((void *)lock, sizeof(*lock)); lockdep_init_map(&lock->dep_map, name, key, 0); #endif lock->raw_lock = (arch_rwlock_t) __ARCH_RW_LOCK_UNLOCKED; lock->magic = RWLOCK_MAGIC; lock->owner = SPINLOCK_OWNER_INIT; lock->owner_cpu = -1; } EXPORT_SYMBOL(__rwlock_init); static void spin_dump(raw_spinlock_t *lock, const char *msg) { struct task_struct *owner = NULL; if (lock->owner && lock->owner != SPINLOCK_OWNER_INIT) owner = lock->owner; printk(KERN_EMERG "BUG: spinlock %s on CPU#%d, %s/%d\n", msg, raw_smp_processor_id(), current->comm, task_pid_nr(current)); printk(KERN_EMERG " lock: %pS, .magic: %08x, .owner: %s/%d, " ".owner_cpu: %d\n", lock, lock->magic, owner ? owner->comm : "", owner ? task_pid_nr(owner) : -1, lock->owner_cpu); dump_stack(); } static void spin_bug(raw_spinlock_t *lock, const char *msg) { if (!debug_locks_off()) return; spin_dump(lock, msg); } #define SPIN_BUG_ON(cond, lock, msg) if (unlikely(cond)) spin_bug(lock, msg) static inline void debug_spin_lock_before(raw_spinlock_t *lock) { SPIN_BUG_ON(lock->magic != SPINLOCK_MAGIC, lock, "bad magic"); SPIN_BUG_ON(lock->owner == current, lock, "recursion"); SPIN_BUG_ON(lock->owner_cpu == raw_smp_processor_id(), lock, "cpu recursion"); } static inline void debug_spin_lock_after(raw_spinlock_t *lock) { lock->owner_cpu = raw_smp_processor_id(); lock->owner = current; } static inline void debug_spin_unlock(raw_spinlock_t *lock) { SPIN_BUG_ON(lock->magic != SPINLOCK_MAGIC, lock, "bad magic"); SPIN_BUG_ON(!raw_spin_is_locked(lock), lock, "already unlocked"); SPIN_BUG_ON(lock->owner != current, lock, "wrong owner"); SPIN_BUG_ON(lock->owner_cpu != raw_smp_processor_id(), lock, "wrong CPU"); lock->owner = SPINLOCK_OWNER_INIT; lock->owner_cpu = -1; } static void __spin_lock_debug(raw_spinlock_t *lock) { u64 i; u64 loops = loops_per_jiffy * HZ; for (i = 0; i < loops; i++) { if (arch_spin_trylock(&lock->raw_lock)) return; __delay(1); } /* lockup suspected: */ spin_dump(lock, "lockup suspected"); #ifdef CONFIG_SMP trigger_all_cpu_backtrace(); #endif /* * The trylock above was causing a livelock. Give the lower level arch * specific lock code a chance to acquire the lock. We have already * printed a warning/backtrace at this point. The non-debug arch * specific code might actually succeed in acquiring the lock. If it is * not successful, the end-result is the same - there is no forward * progress. */ arch_spin_lock(&lock->raw_lock); } void do_raw_spin_lock(raw_spinlock_t *lock) { debug_spin_lock_before(lock); if (unlikely(!arch_spin_trylock(&lock->raw_lock))) __spin_lock_debug(lock); debug_spin_lock_after(lock); } int do_raw_spin_trylock(raw_spinlock_t *lock) { int ret = arch_spin_trylock(&lock->raw_lock); if (ret) debug_spin_lock_after(lock); #ifndef CONFIG_SMP /* * Must not happen on UP: */ SPIN_BUG_ON(!ret, lock, "trylock failure on UP"); #endif return ret; } void do_raw_spin_unlock(raw_spinlock_t *lock) { debug_spin_unlock(lock); arch_spin_unlock(&lock->raw_lock); } static void rwlock_bug(rwlock_t *lock, const char *msg) { if (!debug_locks_off()) return; printk(KERN_EMERG "BUG: rwlock %s on CPU#%d, %s/%d, %p\n", msg, raw_smp_processor_id(), current->comm, task_pid_nr(current), lock); dump_stack(); } #define RWLOCK_BUG_ON(cond, lock, msg) if (unlikely(cond)) rwlock_bug(lock, msg) #if 0 /* __write_lock_debug() can lock up - maybe this can too? */ static void __read_lock_debug(rwlock_t *lock) { u64 i; u64 loops = loops_per_jiffy * HZ; int print_once = 1; for (;;) { for (i = 0; i < loops; i++) { if (arch_read_trylock(&lock->raw_lock)) return; __delay(1); } /* lockup suspected: */ if (print_once) { print_once = 0; printk(KERN_EMERG "BUG: read-lock lockup on CPU#%d, " "%s/%d, %p\n", raw_smp_processor_id(), current->comm, current->pid, lock); dump_stack(); } } } #endif void do_raw_read_lock(rwlock_t *lock) { RWLOCK_BUG_ON(lock->magic != RWLOCK_MAGIC, lock, "bad magic"); arch_read_lock(&lock->raw_lock); } int do_raw_read_trylock(rwlock_t *lock) { int ret = arch_read_trylock(&lock->raw_lock); #ifndef CONFIG_SMP /* * Must not happen on UP: */ RWLOCK_BUG_ON(!ret, lock, "trylock failure on UP"); #endif return ret; } void do_raw_read_unlock(rwlock_t *lock) { RWLOCK_BUG_ON(lock->magic != RWLOCK_MAGIC, lock, "bad magic"); arch_read_unlock(&lock->raw_lock); } static inline void debug_write_lock_before(rwlock_t *lock) { RWLOCK_BUG_ON(lock->magic != RWLOCK_MAGIC, lock, "bad magic"); RWLOCK_BUG_ON(lock->owner == current, lock, "recursion"); RWLOCK_BUG_ON(lock->owner_cpu == raw_smp_processor_id(), lock, "cpu recursion"); } static inline void debug_write_lock_after(rwlock_t *lock) { lock->owner_cpu = raw_smp_processor_id(); lock->owner = current; } static inline void debug_write_unlock(rwlock_t *lock) { RWLOCK_BUG_ON(lock->magic != RWLOCK_MAGIC, lock, "bad magic"); RWLOCK_BUG_ON(lock->owner != current, lock, "wrong owner"); RWLOCK_BUG_ON(lock->owner_cpu != raw_smp_processor_id(), lock, "wrong CPU"); lock->owner = SPINLOCK_OWNER_INIT; lock->owner_cpu = -1; } #if 0 /* This can cause lockups */ static void __write_lock_debug(rwlock_t *lock) { u64 i; u64 loops = loops_per_jiffy * HZ; int print_once = 1; for (;;) { for (i = 0; i < loops; i++) { if (arch_write_trylock(&lock->raw_lock)) return; __delay(1); } /* lockup suspected: */ if (print_once) { print_once = 0; printk(KERN_EMERG "BUG: write-lock lockup on CPU#%d, " "%s/%d, %p\n", raw_smp_processor_id(), current->comm, current->pid, lock); dump_stack(); } } } #endif void do_raw_write_lock(rwlock_t *lock) { debug_write_lock_before(lock); arch_write_lock(&lock->raw_lock); debug_write_lock_after(lock); } int do_raw_write_trylock(rwlock_t *lock) { int ret = arch_write_trylock(&lock->raw_lock); if (ret) debug_write_lock_after(lock); #ifndef CONFIG_SMP /* * Must not happen on UP: */ RWLOCK_BUG_ON(!ret, lock, "trylock failure on UP"); #endif return ret; } void do_raw_write_unlock(rwlock_t *lock) { debug_write_unlock(lock); arch_write_unlock(&lock->raw_lock); } ngs/clock/bcm-ns2.h?h=nds-private-remove&id=853a14ba4682f820266469979c9297debc05f60c'>plain -rw-r--r--bcm-nsp.h2148log plain -rw-r--r--bcm21664.h1984log plain -rw-r--r--bcm281xx.h2456log plain -rw-r--r--bcm2835-aux.h635log plain -rw-r--r--bcm2835.h1962log plain -rw-r--r--berlin2.h1034log plain -rw-r--r--berlin2q.h695log plain -rw-r--r--clps711x-clock.h718log plain -rw-r--r--efm32-cmu.h1112log plain -rw-r--r--exynos-audss-clk.h597log plain -rw-r--r--exynos3250.h9083log plain -rw-r--r--exynos4.h8284log plain -rw-r--r--exynos4415.h9828log plain -rw-r--r--exynos5250.h4616log plain -rw-r--r--exynos5260-clk.h14876log plain -rw-r--r--exynos5410.h1689log plain -rw-r--r--exynos5420.h6857log plain -rw-r--r--exynos5433.h45372log plain -rw-r--r--exynos5440.h1141log plain -rw-r--r--exynos7-clk.h5281log plain -rw-r--r--gxbb-aoclkc.h2866log plain -rw-r--r--gxbb-clkc.h592log plain -rw-r--r--hi3516cv300-clock.h1668log plain -rw-r--r--hi3519-clock.h1328log plain -rw-r--r--hi3620-clock.h4496log plain -rw-r--r--hi6220-clock.h4508log plain -rw-r--r--hip04-clock.h1137log plain -rw-r--r--histb-clock.h2012log plain -rw-r--r--hix5hd2-clock.h2415log plain -rw-r--r--imx1-clock.h1055log plain -rw-r--r--imx21-clock.h2461log plain -rw-r--r--imx27-clock.h3494log plain -rw-r--r--imx5-clock.h7212log plain -rw-r--r--imx6qdl-clock.h9593log plain -rw-r--r--imx6sl-clock.h5849log plain -rw-r--r--imx6sx-clock.h9099log plain -rw-r--r--imx6ul-clock.h8203log plain -rw-r--r--imx7d-clock.h15974log plain -rw-r--r--jz4740-cgu.h1028log plain -rw-r--r--jz4780-cgu.h2470log plain -rw-r--r--lpc18xx-ccu.h2134log plain -rw-r--r--lpc18xx-cgu.h1142log plain -rw-r--r--lpc32xx-clock.h1633log plain -rw-r--r--lsi,axm5516-clks.h974log plain -rw-r--r--marvell,mmp2.h2022log plain -rw-r--r--marvell,pxa168.h1654log plain -rw-r--r--marvell,pxa1928.h1535log plain -rw-r--r--marvell,pxa910.h1598log plain -rw-r--r--maxim,max77620.h632log plain -rw-r--r--maxim,max77686.h648log plain -rw-r--r--maxim,max77802.h630log plain -rw-r--r--meson8b-clkc.h523log plain -rw-r--r--microchip,pic32-clock.h1150log plain -rw-r--r--mpc512x-clock.h2236log plain -rw-r--r--mt2701-clk.h13832log plain -rw-r--r--mt8135-clk.h5641log plain -rw-r--r--mt8173-clk.h9293log plain -rw-r--r--oxsemi,ox810se.h1002log plain -rw-r--r--oxsemi,ox820.h1203log plain -rw-r--r--pistachio-clk.h4863log plain -rw-r--r--pxa-clock.h1715log plain -rw-r--r--qcom,gcc-apq8084.h12872log plain -rw-r--r--qcom,gcc-ipq4019.h5423log plain -rw-r--r--qcom,gcc-ipq806x.h8574log plain -rw-r--r--qcom,gcc-mdm9615.h9497log plain -rw-r--r--qcom,gcc-msm8660.h7932log plain -rw-r--r--qcom,gcc-msm8916.h6190log plain -rw-r--r--qcom,gcc-msm8960.h9342log plain -rw-r--r--qcom,gcc-msm8974.h12340log plain -rw-r--r--qcom,gcc-msm8994.h4858log plain -rw-r--r--qcom,gcc-msm8996.h12575log plain -rw-r--r--qcom,lcc-ipq806x.h899log plain -rw-r--r--qcom,lcc-mdm9615.h1701log plain -rw-r--r--qcom,lcc-msm8960.h1616log plain -rw-r--r--qcom,mmcc-apq8084.h5722log plain -rw-r--r--qcom,mmcc-msm8960.h4109log plain -rw-r--r--qcom,mmcc-msm8974.h5223log plain -rw-r--r--qcom,mmcc-msm8996.h9403log plain -rw-r--r--qcom,rpmcc.h2101log plain -rw-r--r--r7s72100-clock.h1218log plain -rw-r--r--r8a73a4-clock.h1596log plain -rw-r--r--r8a7740-clock.h1992log plain -rw-r--r--r8a7743-cpg-mssr.h1269log plain -rw-r--r--r8a7745-cpg-mssr.h1298log plain -rw-r--r--r8a7778-clock.h1855log plain -rw-r--r--r8a7779-clock.h1647log plain -rw-r--r--r8a7790-clock.h4367log plain -rw-r--r--r8a7791-clock.h4388log plain -rw-r--r--r8a7792-clock.h2562log plain -rw-r--r--r8a7793-clock.h4561log plain -rw-r--r--r8a7794-clock.h3679log plain -rw-r--r--r8a7795-cpg-mssr.h1890log plain -rw-r--r--r8a7796-cpg-mssr.h2066log plain -rw-r--r--renesas-cpg-mssr.h542log plain -rw-r--r--rk1108-cru.h6605log plain -rw-r--r--rk3036-cru.h4584log plain -rw-r--r--rk3066a-cru.h1068log plain -rw-r--r--rk3188-cru-common.h6105log plain -rw-r--r--rk3188-cru.h1435log plain