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Date: Tue, 25 Jan 2022 11:36:34 +0900 From: Byungchul Park <byungchul.park@....com> To: torvalds@...ux-foundation.org, mingo@...hat.com, linux-kernel@...r.kernel.org Cc: peterz@...radead.org, will@...nel.org, tglx@...utronix.de, rostedt@...dmis.org, joel@...lfernandes.org, sashal@...nel.org, daniel.vetter@...ll.ch, chris@...is-wilson.co.uk, duyuyang@...il.com, johannes.berg@...el.com, tj@...nel.org, tytso@....edu, willy@...radead.org, david@...morbit.com, amir73il@...il.com, bfields@...ldses.org, gregkh@...uxfoundation.org, kernel-team@....com Subject: [RFC 04/14] dept: Apply Dept to spinlock Makes Dept able to track dependencies by spinlock. Signed-off-by: Byungchul Park <byungchul.park@....com> --- include/linux/lockdep.h | 18 +++++++++++++++--- include/linux/spinlock.h | 24 ++++++++++++++++++++++++ include/linux/spinlock_types.h | 10 ++++++++++ 3 files changed, 49 insertions(+), 3 deletions(-) diff --git a/include/linux/lockdep.h b/include/linux/lockdep.h index bcd9d7d..c08e3ae 100644 --- a/include/linux/lockdep.h +++ b/include/linux/lockdep.h @@ -566,9 +566,21 @@ static inline void print_irqtrace_events(struct task_struct *curr) #define lock_acquire_shared(l, s, t, n, i) lock_acquire(l, s, t, 1, 1, n, i) #define lock_acquire_shared_recursive(l, s, t, n, i) lock_acquire(l, s, t, 2, 1, n, i) -#define spin_acquire(l, s, t, i) lock_acquire_exclusive(l, s, t, NULL, i) -#define spin_acquire_nest(l, s, t, n, i) lock_acquire_exclusive(l, s, t, n, i) -#define spin_release(l, i) lock_release(l, i) +#define spin_acquire(l, s, t, i) \ +do { \ + lock_acquire_exclusive(l, s, t, NULL, i); \ + dept_spin_lock(&(l)->dmap, s, t, NULL, "spin_unlock", i); \ +} while (0) +#define spin_acquire_nest(l, s, t, n, i) \ +do { \ + lock_acquire_exclusive(l, s, t, n, i); \ + dept_spin_lock(&(l)->dmap, s, t, (n) ? &(n)->dmap : NULL, "spin_unlock", i); \ +} while (0) +#define spin_release(l, i) \ +do { \ + lock_release(l, i); \ + dept_spin_unlock(&(l)->dmap, i); \ +} while (0) #define rwlock_acquire(l, s, t, i) lock_acquire_exclusive(l, s, t, NULL, i) #define rwlock_acquire_read(l, s, t, i) \ diff --git a/include/linux/spinlock.h b/include/linux/spinlock.h index 7989784..b25bfc1 100644 --- a/include/linux/spinlock.h +++ b/include/linux/spinlock.h @@ -92,6 +92,30 @@ # include <linux/spinlock_up.h> #endif +#ifdef CONFIG_DEPT +#define dept_spin_lock(m, ne, t, n, e_fn, ip) \ +do { \ + if (t) { \ + dept_ecxt_enter(m, 1UL, ip, __func__, e_fn, ne); \ + dept_asked_event(m); \ + } else if (n) { \ + dept_warn_on(dept_top_map() != (n)); \ + } else { \ + dept_wait(m, 1UL, ip, __func__, ne); \ + dept_ecxt_enter(m, 1UL, ip, __func__, e_fn, ne); \ + dept_asked_event(m); \ + } \ +} while (0) +#define dept_spin_unlock(m, ip) \ +do { \ + dept_event(m, 1UL, ip, __func__); \ + dept_ecxt_exit(m, ip); \ +} while (0) +#else +#define dept_spin_lock(m, ne, t, n, e_fn, ip) do { } while (0) +#define dept_spin_unlock(m, ip) do { } while (0) +#endif + #ifdef CONFIG_DEBUG_SPINLOCK extern void __raw_spin_lock_init(raw_spinlock_t *lock, const char *name, struct lock_class_key *key, short inner); diff --git a/include/linux/spinlock_types.h b/include/linux/spinlock_types.h index b981caa..4ed8a9b 100644 --- a/include/linux/spinlock_types.h +++ b/include/linux/spinlock_types.h @@ -32,16 +32,26 @@ #define SPINLOCK_OWNER_INIT ((void *)-1L) +#ifdef CONFIG_DEPT +# define RAW_SPIN_DMAP_INIT(lockname) .dmap = { .name = #lockname }, +# define SPIN_DMAP_INIT(lockname) .dmap = { .name = #lockname }, +#else +# define RAW_SPIN_DMAP_INIT(lockname) +# define SPIN_DMAP_INIT(lockname) +#endif + #ifdef CONFIG_DEBUG_LOCK_ALLOC # define RAW_SPIN_DEP_MAP_INIT(lockname) \ .dep_map = { \ .name = #lockname, \ .wait_type_inner = LD_WAIT_SPIN, \ + RAW_SPIN_DMAP_INIT(lockname) \ } # define SPIN_DEP_MAP_INIT(lockname) \ .dep_map = { \ .name = #lockname, \ .wait_type_inner = LD_WAIT_CONFIG, \ + SPIN_DMAP_INIT(lockname) \ } #else # define RAW_SPIN_DEP_MAP_INIT(lockname) -- 1.9.1
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