tree: https://android.googlesource.com/kernel/common android-trusty-5.4 head: 055ccbe92295978be3d8d20275b35b5e8779664d commit: f96574c5bf1e925b1c511416914d9c1b666b34fd [2/32] ANDROID: trusty: Add trusty driver config: arm-allmodconfig (attached as .config) compiler: arm-linux-gnueabi-gcc (GCC) 9.3.0 reproduce (this is a W=1 build): wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross git checkout f96574c5bf1e925b1c511416914d9c1b666b34fd # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=arm If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; All errors (new ones prefixed by >>): 37 | s32 trusty_fast_call32(struct device *dev, u32 smcnr, u32 a0, u32 a1, u32 a2) | ^~~~~~~~~~~~~~~~~~ In file included from drivers/trusty/trusty.c:24: include/linux/trusty/trusty.h:32:19: note: previous definition of 'trusty_fast_call32' was here 32 | static inline s32 trusty_fast_call32(struct device *dev, u32 smcnr, | ^~~~~~~~~~~~~~~~~~ drivers/trusty/trusty.c: In function 'trusty_std_call_helper': drivers/trusty/trusty.c:88:23: warning: unused variable 's' [-Wunused-variable] 88 | struct trusty_state *s = platform_get_drvdata(to_platform_device(dev)); | ^ drivers/trusty/trusty.c: At top level: 116 | s32 trusty_std_call32(struct device *dev, u32 smcnr, u32 a0, u32 a1, u32 a2) | ^~~~~~~~~~~~~~~~~ In file included from drivers/trusty/trusty.c:24: include/linux/trusty/trusty.h:27:19: note: previous definition of 'trusty_std_call32' was here 27 | static inline s32 trusty_std_call32(struct device *dev, u32 smcnr, | ^~~~~~~~~~~~~~~~~ vim +/trusty_fast_call32 +37 drivers/trusty/trusty.c 25 26 #include "trusty-smc.h" 27 28 struct trusty_state { 29 struct mutex smc_lock; 30 }; 31 32 static inline ulong smc(ulong r0, ulong r1, ulong r2, ulong r3) 33 { 34 return trusty_smc8(r0, r1, r2, r3, 0, 0, 0, 0).r0; 35 } 36 38 { 39 struct trusty_state *s = platform_get_drvdata(to_platform_device(dev)); 40 41 BUG_ON(!s); 42 BUG_ON(!SMC_IS_FASTCALL(smcnr)); 43 BUG_ON(SMC_IS_SMC64(smcnr)); 44 45 return smc(smcnr, a0, a1, a2); 46 } 47 EXPORT_SYMBOL(trusty_fast_call32); 48 49 #ifdef CONFIG_64BIT 50 s64 trusty_fast_call64(struct device *dev, u64 smcnr, u64 a0, u64 a1, u64 a2) 51 { 52 struct trusty_state *s = platform_get_drvdata(to_platform_device(dev)); 53 54 BUG_ON(!s); 55 BUG_ON(!SMC_IS_FASTCALL(smcnr)); 56 BUG_ON(!SMC_IS_SMC64(smcnr)); 57 58 return smc(smcnr, a0, a1, a2); 59 } 60 #endif 61 62 static ulong trusty_std_call_inner(struct device *dev, ulong smcnr, 63 ulong a0, ulong a1, ulong a2) 64 { 65 ulong ret; 66 int retry = 5; 67 68 dev_dbg(dev, "%s(0x%lx 0x%lx 0x%lx 0x%lx)\n", 69 __func__, smcnr, a0, a1, a2); 70 while (true) { 71 ret = smc(smcnr, a0, a1, a2); 72 if ((int)ret != SM_ERR_BUSY || !retry) 73 break; 74 75 dev_dbg(dev, "%s(0x%lx 0x%lx 0x%lx 0x%lx) returned busy, retry\n", 76 __func__, smcnr, a0, a1, a2); 77 retry--; 78 } 79 80 return ret; 81 } 82 83 static ulong trusty_std_call_helper(struct device *dev, ulong smcnr, 84 ulong a0, ulong a1, ulong a2) 85 { 86 ulong ret; 87 int sleep_time = 1; 88 struct trusty_state *s = platform_get_drvdata(to_platform_device(dev)); 89 90 while (true) { 91 ret = trusty_std_call_inner(dev, smcnr, a0, a1, a2); 92 if ((int)ret != SM_ERR_BUSY) 93 break; 94 95 if (sleep_time == 256) 96 dev_warn(dev, "%s(0x%lx 0x%lx 0x%lx 0x%lx) returned busy\n", 97 __func__, smcnr, a0, a1, a2); 98 dev_dbg(dev, "%s(0x%lx 0x%lx 0x%lx 0x%lx) returned busy, wait %d ms\n", 99 __func__, smcnr, a0, a1, a2, sleep_time); 100 101 msleep(sleep_time); 102 if (sleep_time < 1000) 103 sleep_time <<= 1; 104 105 dev_dbg(dev, "%s(0x%lx 0x%lx 0x%lx 0x%lx) retry\n", 106 __func__, smcnr, a0, a1, a2); 107 } 108 109 if (sleep_time > 256) 110 dev_warn(dev, "%s(0x%lx 0x%lx 0x%lx 0x%lx) busy cleared\n", 111 __func__, smcnr, a0, a1, a2); 112 113 return ret; 114 } 115 117 { 118 int ret; 119 struct trusty_state *s = platform_get_drvdata(to_platform_device(dev)); 120 121 BUG_ON(SMC_IS_FASTCALL(smcnr)); 122 BUG_ON(SMC_IS_SMC64(smcnr)); 123 124 mutex_lock(&s->smc_lock); 125 126 dev_dbg(dev, "%s(0x%x 0x%x 0x%x 0x%x) started\n", 127 __func__, smcnr, a0, a1, a2); 128 129 ret = trusty_std_call_helper(dev, smcnr, a0, a1, a2); 130 while (ret == SM_ERR_INTERRUPTED) { 131 dev_dbg(dev, "%s(0x%x 0x%x 0x%x 0x%x) interrupted\n", 132 __func__, smcnr, a0, a1, a2); 133 ret = trusty_std_call_helper(dev, SMC_SC_RESTART_LAST, 0, 0, 0); 134 } 135 dev_dbg(dev, "%s(0x%x 0x%x 0x%x 0x%x) returned 0x%x\n", 136 __func__, smcnr, a0, a1, a2, ret); 137 138 WARN_ONCE(ret == SM_ERR_PANIC, "trusty crashed"); 139 140 mutex_unlock(&s->smc_lock); 141 142 return ret; 143 } 144 EXPORT_SYMBOL(trusty_std_call32); 145 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org