1 /**************************************************************************** 2 **************************************************************************** 3 *** 4 *** This header was automatically generated from a Linux kernel header 5 *** of the same name, to make information necessary for userspace to 6 *** call into the kernel available to libc. It contains only constants, 7 *** structures, and macros generated from the original header, and thus, 8 *** contains no copyrightable information. 9 *** 10 *** To edit the content of this header, modify the corresponding 11 *** source file (e.g. under external/kernel-headers/original/) then 12 *** run bionic/libc/kernel/tools/update_all.py 13 *** 14 *** Any manual change here will be lost the next time this script will 15 *** be run. You've been warned! 16 *** 17 **************************************************************************** 18 ****************************************************************************/ 19 #ifndef __LINUX_SEQLOCK_H 20 #define __LINUX_SEQLOCK_H 21 #include <linux/spinlock.h> 22 #include <linux/preempt.h> 23 /* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */ 24 typedef struct { 25 unsigned sequence; 26 spinlock_t lock; 27 } seqlock_t; 28 /* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */ 29 #define __SEQLOCK_UNLOCKED(lockname) { 0, __SPIN_LOCK_UNLOCKED(lockname) } 30 #define SEQLOCK_UNLOCKED __SEQLOCK_UNLOCKED(old_style_seqlock_init) 31 #define seqlock_init(x) do { *(x) = (seqlock_t) __SEQLOCK_UNLOCKED(x); } while (0) 32 #define DEFINE_SEQLOCK(x) seqlock_t x = __SEQLOCK_UNLOCKED(x) 33 /* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */ 34 typedef struct seqcount { 35 unsigned sequence; 36 } seqcount_t; 37 #define SEQCNT_ZERO { 0 } 38 /* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */ 39 #define seqcount_init(x) do { *(x) = (seqcount_t) SEQCNT_ZERO; } while (0) 40 #define write_seqlock_irqsave(lock, flags) do { local_irq_save(flags); write_seqlock(lock); } while (0) 41 #define write_seqlock_irq(lock) do { local_irq_disable(); write_seqlock(lock); } while (0) 42 #define write_seqlock_bh(lock) do { local_bh_disable(); write_seqlock(lock); } while (0) 43 /* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */ 44 #define write_sequnlock_irqrestore(lock, flags) do { write_sequnlock(lock); local_irq_restore(flags); } while(0) 45 #define write_sequnlock_irq(lock) do { write_sequnlock(lock); local_irq_enable(); } while(0) 46 #define write_sequnlock_bh(lock) do { write_sequnlock(lock); local_bh_enable(); } while(0) 47 #define read_seqbegin_irqsave(lock, flags) ({ local_irq_save(flags); read_seqbegin(lock); }) 48 /* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */ 49 #define read_seqretry_irqrestore(lock, iv, flags) ({ int ret = read_seqretry(lock, iv); local_irq_restore(flags); ret; }) 50 #endif 51