Hi, [auto build test ERROR on asm-generic/master] [also build test ERROR on v4.7-rc3 next-20160615] [if your patch is applied to the wrong git tree, please drop us a note to help improve the system] url: https://github.com/0day-ci/linux/commits/Pan-Xinhui/locking-qrwlock-Let-qrwlock-has-same-layout-regardless-of-the-endian/20160615-172044 base: https://git.kernel.org/pub/scm/linux/kernel/git/arnd/asm-generic master config: x86_64-randconfig-x014-201624 (attached as .config) compiler: gcc-6 (Debian 6.1.1-1) 6.1.1 20160430 reproduce: # save the attached .config to linux build tree make ARCH=x86_64 All error/warnings (new ones prefixed by >>): In file included from arch/x86/include/asm/qrwlock.h:5:0, from arch/x86/include/asm/spinlock.h:219, from include/linux/spinlock.h:87, from include/linux/mmzone.h:7, from include/linux/gfp.h:5, from include/linux/slab.h:14, from include/linux/crypto.h:24, from arch/x86/kernel/asm-offsets.c:8: include/asm-generic/qrwlock.h: In function 'queued_read_can_lock': >> include/asm-generic/qrwlock.h:40:29: error: '_QW_SHIFT' undeclared (first use in this function) #define _QW_WMASK (0xffU << _QW_SHIFT) /* Writer mask */ ^ >> include/asm-generic/qrwlock.h:55:38: note: in expansion of macro '_QW_WMASK' return !(atomic_read(&lock->cnts) & _QW_WMASK); ^~~~~~~~~ include/asm-generic/qrwlock.h:40:29: note: each undeclared identifier is reported only once for each function it appears in #define _QW_WMASK (0xffU << _QW_SHIFT) /* Writer mask */ ^ >> include/asm-generic/qrwlock.h:55:38: note: in expansion of macro '_QW_WMASK' return !(atomic_read(&lock->cnts) & _QW_WMASK); ^~~~~~~~~ In file included from arch/x86/include/asm/atomic.h:4:0, from include/linux/atomic.h:4, from include/linux/crypto.h:20, from arch/x86/kernel/asm-offsets.c:8: include/asm-generic/qrwlock.h: In function 'queued_read_trylock': >> include/asm-generic/qrwlock.h:40:29: error: '_QW_SHIFT' undeclared (first use in this function) #define _QW_WMASK (0xffU << _QW_SHIFT) /* Writer mask */ ^ include/linux/compiler.h:169:40: note: in definition of macro 'likely' # define likely(x) __builtin_expect(!!(x), 1) ^ include/asm-generic/qrwlock.h:77:22: note: in expansion of macro '_QW_WMASK' if (likely(!(cnts & _QW_WMASK))) { ^~~~~~~~~ include/asm-generic/qrwlock.h: In function 'queued_write_trylock': include/asm-generic/qrwlock.h:39:30: error: '_QW_SHIFT' undeclared (first use in this function) #define _QW_LOCKED (0xffU << _QW_SHIFT) /* A writer holds the lock */ ^ include/linux/compiler.h:169:40: note: in definition of macro 'likely' # define likely(x) __builtin_expect(!!(x), 1) ^ >> include/asm-generic/qrwlock.h:100:24: note: in expansion of macro '_QW_LOCKED' cnts, cnts | _QW_LOCKED) == cnts); ^~~~~~~~~~ include/asm-generic/qrwlock.h: In function 'queued_read_lock': >> include/asm-generic/qrwlock.h:40:29: error: '_QW_SHIFT' undeclared (first use in this function) #define _QW_WMASK (0xffU << _QW_SHIFT) /* Writer mask */ ^ include/linux/compiler.h:169:40: note: in definition of macro 'likely' # define likely(x) __builtin_expect(!!(x), 1) ^ include/asm-generic/qrwlock.h:111:22: note: in expansion of macro '_QW_WMASK' if (likely(!(cnts & _QW_WMASK))) ^~~~~~~~~ In file included from arch/x86/include/asm/qrwlock.h:5:0, from arch/x86/include/asm/spinlock.h:219, from include/linux/spinlock.h:87, from include/linux/mmzone.h:7, from include/linux/gfp.h:5, from include/linux/slab.h:14, from include/linux/crypto.h:24, from arch/x86/kernel/asm-offsets.c:8: include/asm-generic/qrwlock.h: In function 'queued_write_lock': include/asm-generic/qrwlock.h:39:30: error: '_QW_SHIFT' undeclared (first use in this function) #define _QW_LOCKED (0xffU << _QW_SHIFT) /* A writer holds the lock */ ^ include/asm-generic/qrwlock.h:125:45: note: in expansion of macro '_QW_LOCKED' if (atomic_cmpxchg_acquire(&lock->cnts, 0, _QW_LOCKED) == 0) ^~~~~~~~~~ make[2]: *** [arch/x86/kernel/asm-offsets.s] Error 1 make[2]: Target '__build' not remade because of errors. make[1]: *** [prepare0] Error 2 make[1]: Target 'prepare' not remade because of errors. make: *** [sub-make] Error 2 vim +/_QW_SHIFT +40 include/asm-generic/qrwlock.h 33 #else 34 #define _QR_SHIFT 0 /* Reader count shift */ 35 #define _QW_SHIFT 24 /* Writer mode shift */ 36 #endif 37 38 #define _QW_WAITING (1U << _QW_SHIFT) /* A writer is waiting */ > 39 #define _QW_LOCKED (0xffU << _QW_SHIFT) /* A writer holds the lock */ > 40 #define _QW_WMASK (0xffU << _QW_SHIFT) /* Writer mask */ 41 #define _QR_BIAS (1U << _QR_SHIFT) 42 43 /* 44 * External function declarations 45 */ 46 extern void queued_read_lock_slowpath(struct qrwlock *lock, u32 cnts); 47 extern void queued_write_lock_slowpath(struct qrwlock *lock); 48 49 /** 50 * queued_read_can_lock- would read_trylock() succeed? 51 * @lock: Pointer to queue rwlock structure 52 */ 53 static inline int queued_read_can_lock(struct qrwlock *lock) 54 { > 55 return !(atomic_read(&lock->cnts) & _QW_WMASK); 56 } 57 58 /** 59 * queued_write_can_lock- would write_trylock() succeed? 60 * @lock: Pointer to queue rwlock structure 61 */ 62 static inline int queued_write_can_lock(struct qrwlock *lock) 63 { 64 return !atomic_read(&lock->cnts); 65 } 66 67 /** 68 * queued_read_trylock - try to acquire read lock of a queue rwlock 69 * @lock : Pointer to queue rwlock structure 70 * Return: 1 if lock acquired, 0 if failed 71 */ 72 static inline int queued_read_trylock(struct qrwlock *lock) 73 { 74 u32 cnts; 75 76 cnts = atomic_read(&lock->cnts); 77 if (likely(!(cnts & _QW_WMASK))) { 78 cnts = (u32)atomic_add_return_acquire(_QR_BIAS, &lock->cnts); 79 if (likely(!(cnts & _QW_WMASK))) 80 return 1; 81 atomic_sub(_QR_BIAS, &lock->cnts); 82 } 83 return 0; 84 } 85 86 /** 87 * queued_write_trylock - try to acquire write lock of a queue rwlock 88 * @lock : Pointer to queue rwlock structure 89 * Return: 1 if lock acquired, 0 if failed 90 */ 91 static inline int queued_write_trylock(struct qrwlock *lock) 92 { 93 u32 cnts; 94 95 cnts = atomic_read(&lock->cnts); 96 if (unlikely(cnts)) 97 return 0; 98 99 return likely(atomic_cmpxchg_acquire(&lock->cnts, > 100 cnts, cnts | _QW_LOCKED) == cnts); 101 } 102 /** 103 * queued_read_lock - acquire read lock of a queue rwlock --- 0-DAY kernel test infrastructure Open Source Technology Center https://lists.01.org/pipermail/kbuild-all Intel Corporation
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