diff options
Diffstat (limited to 'security/apparmor/include/path.h')
| -rw-r--r-- | security/apparmor/include/path.h | 19 |
1 files changed, 16 insertions, 3 deletions
diff --git a/security/apparmor/include/path.h b/security/apparmor/include/path.h index 35a8295e8f3a..2d5f4fe3ed79 100644 --- a/security/apparmor/include/path.h +++ b/security/apparmor/include/path.h @@ -36,8 +36,10 @@ struct aa_buffers { #include <linux/percpu.h> #include <linux/preempt.h> +#include <linux/locallock.h> DECLARE_PER_CPU(struct aa_buffers, aa_buffers); +DECLARE_LOCAL_IRQ_LOCK(aa_buffers_lock); #define ASSIGN(FN, A, X, N) ((X) = FN(A, N)) #define EVAL1(FN, A, X) ASSIGN(FN, A, X, 0) /*X = FN(0)*/ @@ -47,7 +49,17 @@ DECLARE_PER_CPU(struct aa_buffers, aa_buffers); #define for_each_cpu_buffer(I) for ((I) = 0; (I) < MAX_PATH_BUFFERS; (I)++) -#ifdef CONFIG_DEBUG_PREEMPT +#ifdef CONFIG_PREEMPT_RT_BASE +static inline void AA_BUG_PREEMPT_ENABLED(const char *s) +{ + struct local_irq_lock *lv; + + lv = this_cpu_ptr(&aa_buffers_lock); + WARN_ONCE(lv->owner != current, + "__get_buffer without aa_buffers_lock\n"); +} + +#elif defined(CONFIG_DEBUG_PREEMPT) #define AA_BUG_PREEMPT_ENABLED(X) AA_BUG(preempt_count() <= 0, X) #else #define AA_BUG_PREEMPT_ENABLED(X) /* nop */ @@ -63,14 +75,15 @@ DECLARE_PER_CPU(struct aa_buffers, aa_buffers); #define get_buffers(X...) \ do { \ - struct aa_buffers *__cpu_var = get_cpu_ptr(&aa_buffers); \ + struct aa_buffers *__cpu_var; \ + __cpu_var = get_locked_ptr(aa_buffers_lock, &aa_buffers); \ __get_buffers(__cpu_var, X); \ } while (0) #define put_buffers(X, Y...) \ do { \ __put_buffers(X, Y); \ - put_cpu_ptr(&aa_buffers); \ + put_locked_ptr(aa_buffers_lock, &aa_buffers); \ } while (0) #endif /* __AA_PATH_H */ |