Green shading in the line number column means the source is part of the translation unit, red means it is conditionally excluded. Highlighted line numbers link to the translation unit page. Highlighted macros link to the macro page.
1: /* thread_info.h: common low-level thread information accessors 2: * 3: * Copyright (C) 2002 David Howells (dhowells@redhat.com) 4: * - Incorporating suggestions made by Linus Torvalds 5: */ 6: 7: #ifndef _LINUX_THREAD_INFO_H 8: #define _LINUX_THREAD_INFO_H 9: 10: #include <linux/types.h> 11: #include <linux/bug.h> 12: 13: struct timespec; 14: struct compat_timespec; 15: 16: /* 17: * System call restart block. 18: */ 19: struct restart_block { 20: long (*fn)(struct restart_block *); 21: union { 22: /* For futex_wait and futex_wait_requeue_pi */ 23: struct { 24: u32 __user *uaddr; 25: u32 val; 26: u32 flags; 27: u32 bitset; 28: u64 time; 29: u32 __user *uaddr2; 30: } futex; 31: /* For nanosleep */ 32: struct { 33: clockid_t clockid; 34: struct timespec __user *rmtp; 35: #ifdef CONFIG_COMPAT 36: struct compat_timespec __user *compat_rmtp; 37: #endif 38: u64 expires; 39: } nanosleep; 40: /* For poll */ 41: struct { 42: struct pollfd __user *ufds; 43: int nfds; 44: int has_timeout; 45: unsigned long tv_sec; 46: unsigned long tv_nsec; 47: } poll; 48: }; 49: }; 50: 51: extern long do_no_restart_syscall(struct restart_block *parm); 52: 53: #include <linux/bitops.h> 54: #include <asm/thread_info.h> 55: 56: #ifdef __KERNEL__ 57: 58: #ifdef CONFIG_DEBUG_STACK_USAGE 59: # define THREADINFO_GFP (GFP_KERNEL | __GFP_NOTRACK | __GFP_ZERO) 60: #else 61: # define THREADINFO_GFP (GFP_KERNEL | __GFP_NOTRACK) 62: #endif 63: 64: #define THREADINFO_GFP_ACCOUNTED (THREADINFO_GFP | __GFP_KMEMCG) 65: 66: /* 67: * flag set/clear/test wrappers 68: * - pass TIF_xxxx constants to these functions 69: */ 70: 71: static inline void set_ti_thread_flag(struct thread_info *ti, int flag) 72: { 73: set_bit(flag, (unsigned long *)&ti->flags); 74: } 75: 76: static inline void clear_ti_thread_flag(struct thread_info *ti, int flag) 77: { 78: clear_bit(flag, (unsigned long *)&ti->flags); 79: } 80: 81: static inline int test_and_set_ti_thread_flag(struct thread_info *ti, int flag) 82: { 83: return test_and_set_bit(flag, (unsigned long *)&ti->flags); 84: } 85: 86: static inline int test_and_clear_ti_thread_flag(struct thread_info *ti, int flag) 87: { 88: return test_and_clear_bit(flag, (unsigned long *)&ti->flags); 89: } 90: 91: static inline int test_ti_thread_flag(struct thread_info *ti, int flag) 92: { 93: return test_bit(flag, (unsigned long *)&ti->flags); 94: } 95: 96: #define set_thread_flag(flag) \ 97: set_ti_thread_flag(current_thread_info(), flag) 98: #define clear_thread_flag(flag) \ 99: clear_ti_thread_flag(current_thread_info(), flag) 100: #define test_and_set_thread_flag(flag) \ 101: test_and_set_ti_thread_flag(current_thread_info(), flag) 102: #define test_and_clear_thread_flag(flag) \ 103: test_and_clear_ti_thread_flag(current_thread_info(), flag) 104: #define test_thread_flag(flag) \ 105: test_ti_thread_flag(current_thread_info(), flag) 106: 107: static inline __deprecated void set_need_resched(void) 108: { 109: /* 110: * Use of this function in deprecated. 111: * 112: * As of this writing there are only a few users in the DRM tree left 113: * all of which are wrong and can be removed without causing too much 114: * grief. 115: * 116: * The DRM people are aware and are working on removing the last few 117: * instances. 118: */ 119: } 120: 121: #define tif_need_resched() test_thread_flag(TIF_NEED_RESCHED) 122: 123: #if defined TIF_RESTORE_SIGMASK && !defined HAVE_SET_RESTORE_SIGMASK 124: /* 125: * An arch can define its own version of set_restore_sigmask() to get the 126: * job done however works, with or without TIF_RESTORE_SIGMASK. 127: */ 128: #define HAVE_SET_RESTORE_SIGMASK 1 129: 130: /** 131: * set_restore_sigmask() - make sure saved_sigmask processing gets done 132: * 133: * This sets TIF_RESTORE_SIGMASK and ensures that the arch signal code 134: * will run before returning to user mode, to process the flag. For 135: * all callers, TIF_SIGPENDING is already set or it's no harm to set 136: * it. TIF_RESTORE_SIGMASK need not be in the set of bits that the 137: * arch code will notice on return to user mode, in case those bits 138: * are scarce. We set TIF_SIGPENDING here to ensure that the arch 139: * signal code always gets run when TIF_RESTORE_SIGMASK is set. 140: */ 141: static inline void set_restore_sigmask(void) 142: { 143: set_thread_flag(TIF_RESTORE_SIGMASK); 144: WARN_ON(!test_thread_flag(TIF_SIGPENDING)); 145: } 146: static inline void clear_restore_sigmask(void) 147: { 148: clear_thread_flag(TIF_RESTORE_SIGMASK); 149: } 150: static inline bool test_restore_sigmask(void) 151: { 152: return test_thread_flag(TIF_RESTORE_SIGMASK); 153: } 154: static inline bool test_and_clear_restore_sigmask(void) 155: { 156: return test_and_clear_thread_flag(TIF_RESTORE_SIGMASK); 157: } 158: #endif /* TIF_RESTORE_SIGMASK && !HAVE_SET_RESTORE_SIGMASK */ 159: 160: #ifndef HAVE_SET_RESTORE_SIGMASK 161: #error "no set_restore_sigmask() provided and default one won't work" 162: #endif 163: 164: #endif /* __KERNEL__ */ 165: 166: #endif /* _LINUX_THREAD_INFO_H */ 167: