Hi Sasha, First bad commit (maybe != root cause): tree: https://git.kernel.org/pub/scm/linux/kernel/git/jirislaby/linux-stable.git stable-3.12-queue head: 83527a0b730e1458a3a4e5db3af74bef0bb9ce05 commit: 478a5f81defe61a89083f3b719e142f250427098 [2253/3338] kernel: add support for gcc 5 config: mips-fuloong2e_defconfig (attached as .config) reproduce: wget https://git.kernel.org/cgit/linux/kernel/git/wfg/lkp-tests.git/plain/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross git checkout 478a5f81defe61a89083f3b719e142f250427098 # save the attached .config to linux build tree make.cross ARCH=mips All error/warnings (new ones prefixed by >>): arch/mips/kernel/r4k_switch.S: Assembler messages: >> arch/mips/kernel/r4k_switch.S:67: Error: opcode not supported on this processor: loongson2e (mips3) `sdc1 $f1,904($4)' >> arch/mips/kernel/r4k_switch.S:67: Error: opcode not supported on this processor: loongson2e (mips3) `sdc1 $f3,920($4)' >> arch/mips/kernel/r4k_switch.S:67: Error: opcode not supported on this processor: loongson2e (mips3) `sdc1 $f5,936($4)' >> arch/mips/kernel/r4k_switch.S:67: Error: opcode not supported on this processor: loongson2e (mips3) `sdc1 $f7,952($4)' >> arch/mips/kernel/r4k_switch.S:67: Error: opcode not supported on this processor: loongson2e (mips3) `sdc1 $f9,968($4)' >> arch/mips/kernel/r4k_switch.S:67: Error: opcode not supported on this processor: loongson2e (mips3) `sdc1 $f11,984($4)' >> arch/mips/kernel/r4k_switch.S:67: Error: opcode not supported on this processor: loongson2e (mips3) `sdc1 $f13,1000($4)' >> arch/mips/kernel/r4k_switch.S:67: Error: opcode not supported on this processor: loongson2e (mips3) `sdc1 $f15,1016($4)' >> arch/mips/kernel/r4k_switch.S:67: Error: opcode not supported on this processor: loongson2e (mips3) `sdc1 $f17,1032($4)' >> arch/mips/kernel/r4k_switch.S:67: Error: opcode not supported on this processor: loongson2e (mips3) `sdc1 $f19,1048($4)' >> arch/mips/kernel/r4k_switch.S:67: Error: opcode not supported on this processor: loongson2e (mips3) `sdc1 $f21,1064($4)' >> arch/mips/kernel/r4k_switch.S:67: Error: opcode not supported on this processor: loongson2e (mips3) `sdc1 $f23,1080($4)' >> arch/mips/kernel/r4k_switch.S:67: Error: opcode not supported on this processor: loongson2e (mips3) `sdc1 $f25,1096($4)' >> arch/mips/kernel/r4k_switch.S:67: Error: opcode not supported on this processor: loongson2e (mips3) `sdc1 $f27,1112($4)' >> arch/mips/kernel/r4k_switch.S:67: Error: opcode not supported on this processor: loongson2e (mips3) `sdc1 $f29,1128($4)' >> arch/mips/kernel/r4k_switch.S:67: Error: opcode not supported on this processor: loongson2e (mips3) `sdc1 $f31,1144($4)' arch/mips/kernel/r4k_switch.S:67: Error: opcode not supported on this processor: loongson2e (mips3) `sdc1 $f0,896($4)' arch/mips/kernel/r4k_switch.S:67: Error: opcode not supported on this processor: loongson2e (mips3) `sdc1 $f2,912($4)' arch/mips/kernel/r4k_switch.S:67: Error: opcode not supported on this processor: loongson2e (mips3) `sdc1 $f4,928($4)' arch/mips/kernel/r4k_switch.S:67: Error: opcode not supported on this processor: loongson2e (mips3) `sdc1 $f6,944($4)' arch/mips/kernel/r4k_switch.S:67: Error: opcode not supported on this processor: loongson2e (mips3) `sdc1 $f8,960($4)' arch/mips/kernel/r4k_switch.S:67: Error: opcode not supported on this processor: loongson2e (mips3) `sdc1 $f10,976($4)' arch/mips/kernel/r4k_switch.S:67: Error: opcode not supported on this processor: loongson2e (mips3) `sdc1 $f12,992($4)' arch/mips/kernel/r4k_switch.S:67: Error: opcode not supported on this processor: loongson2e (mips3) `sdc1 $f14,1008($4)' arch/mips/kernel/r4k_switch.S:67: Error: opcode not supported on this processor: loongson2e (mips3) `sdc1 $f16,1024($4)' arch/mips/kernel/r4k_switch.S:67: Error: opcode not supported on this processor: loongson2e (mips3) `sdc1 $f18,1040($4)' arch/mips/kernel/r4k_switch.S:67: Error: opcode not supported on this processor: loongson2e (mips3) `sdc1 $f20,1056($4)' arch/mips/kernel/r4k_switch.S:67: Error: opcode not supported on this processor: loongson2e (mips3) `sdc1 $f22,1072($4)' arch/mips/kernel/r4k_switch.S:67: Error: opcode not supported on this processor: loongson2e (mips3) `sdc1 $f24,1088($4)' arch/mips/kernel/r4k_switch.S:67: Error: opcode not supported on this processor: loongson2e (mips3) `sdc1 $f26,1104($4)' arch/mips/kernel/r4k_switch.S:67: Error: opcode not supported on this processor: loongson2e (mips3) `sdc1 $f28,1120($4)' arch/mips/kernel/r4k_switch.S:67: Error: opcode not supported on this processor: loongson2e (mips3) `sdc1 $f30,1136($4)' arch/mips/kernel/r4k_switch.S:129: Error: opcode not supported on this processor: loongson2e (mips3) `sdc1 $f1,904($4)' arch/mips/kernel/r4k_switch.S:129: Error: opcode not supported on this processor: loongson2e (mips3) `sdc1 $f3,920($4)' arch/mips/kernel/r4k_switch.S:129: Error: opcode not supported on this processor: loongson2e (mips3) `sdc1 $f5,936($4)' arch/mips/kernel/r4k_switch.S:129: Error: opcode not supported on this processor: loongson2e (mips3) `sdc1 $f7,952($4)' arch/mips/kernel/r4k_switch.S:129: Error: opcode not supported on this processor: loongson2e (mips3) `sdc1 $f9,968($4)' arch/mips/kernel/r4k_switch.S:129: Error: opcode not supported on this processor: loongson2e (mips3) `sdc1 $f11,984($4)' arch/mips/kernel/r4k_switch.S:129: Error: opcode not supported on this processor: loongson2e (mips3) `sdc1 $f13,1000($4)' arch/mips/kernel/r4k_switch.S:129: Error: opcode not supported on this processor: loongson2e (mips3) `sdc1 $f15,1016($4)' arch/mips/kernel/r4k_switch.S:129: Error: opcode not supported on this processor: loongson2e (mips3) `sdc1 $f17,1032($4)' arch/mips/kernel/r4k_switch.S:129: Error: opcode not supported on this processor: loongson2e (mips3) `sdc1 $f19,1048($4)' arch/mips/kernel/r4k_switch.S:129: Error: opcode not supported on this processor: loongson2e (mips3) `sdc1 $f21,1064($4)' arch/mips/kernel/r4k_switch.S:129: Error: opcode not supported on this processor: loongson2e (mips3) `sdc1 $f23,1080($4)' arch/mips/kernel/r4k_switch.S:129: Error: opcode not supported on this processor: loongson2e (mips3) `sdc1 $f25,1096($4)' arch/mips/kernel/r4k_switch.S:129: Error: opcode not supported on this processor: loongson2e (mips3) `sdc1 $f27,1112($4)' arch/mips/kernel/r4k_switch.S:129: Error: opcode not supported on this processor: loongson2e (mips3) `sdc1 $f29,1128($4)' arch/mips/kernel/r4k_switch.S:129: Error: opcode not supported on this processor: loongson2e (mips3) `sdc1 $f31,1144($4)' arch/mips/kernel/r4k_switch.S:129: Error: opcode not supported on this processor: loongson2e (mips3) `sdc1 $f0,896($4)' arch/mips/kernel/r4k_switch.S:129: Error: opcode not supported on this processor: loongson2e (mips3) `sdc1 $f2,912($4)' arch/mips/kernel/r4k_switch.S:129: Error: opcode not supported on this processor: loongson2e (mips3) `sdc1 $f4,928($4)' arch/mips/kernel/r4k_switch.S:129: Error: opcode not supported on this processor: loongson2e (mips3) `sdc1 $f6,944($4)' arch/mips/kernel/r4k_switch.S:129: Error: opcode not supported on this processor: loongson2e (mips3) `sdc1 $f8,960($4)' arch/mips/kernel/r4k_switch.S:129: Error: opcode not supported on this processor: loongson2e (mips3) `sdc1 $f10,976($4)' arch/mips/kernel/r4k_switch.S:129: Error: opcode not supported on this processor: loongson2e (mips3) `sdc1 $f12,992($4)' arch/mips/kernel/r4k_switch.S:129: Error: opcode not supported on this processor: loongson2e (mips3) `sdc1 $f14,1008($4)' arch/mips/kernel/r4k_switch.S:129: Error: opcode not supported on this processor: loongson2e (mips3) `sdc1 $f16,1024($4)' arch/mips/kernel/r4k_switch.S:129: Error: opcode not supported on this processor: loongson2e (mips3) `sdc1 $f18,1040($4)' arch/mips/kernel/r4k_switch.S:129: Error: opcode not supported on this processor: loongson2e (mips3) `sdc1 $f20,1056($4)' arch/mips/kernel/r4k_switch.S:129: Error: opcode not supported on this processor: loongson2e (mips3) `sdc1 $f22,1072($4)' arch/mips/kernel/r4k_switch.S:129: Error: opcode not supported on this processor: loongson2e (mips3) `sdc1 $f24,1088($4)' arch/mips/kernel/r4k_switch.S:129: Error: opcode not supported on this processor: loongson2e (mips3) `sdc1 $f26,1104($4)' arch/mips/kernel/r4k_switch.S:129: Error: opcode not supported on this processor: loongson2e (mips3) `sdc1 $f28,1120($4)' arch/mips/kernel/r4k_switch.S:129: Error: opcode not supported on this processor: loongson2e (mips3) `sdc1 $f30,1136($4)' >> arch/mips/kernel/r4k_switch.S:140: Error: opcode not supported on this processor: loongson2e (mips3) `ldc1 $f1,904($4)' >> arch/mips/kernel/r4k_switch.S:140: Error: opcode not supported on this processor: loongson2e (mips3) `ldc1 $f3,920($4)' >> arch/mips/kernel/r4k_switch.S:140: Error: opcode not supported on this processor: loongson2e (mips3) `ldc1 $f5,936($4)' >> arch/mips/kernel/r4k_switch.S:140: Error: opcode not supported on this processor: loongson2e (mips3) `ldc1 $f7,952($4)' vim +67 arch/mips/kernel/r4k_switch.S ^1da177e Linus Torvalds 2005-04-16 61 */ ^1da177e Linus Torvalds 2005-04-16 62 LONG_L t0, ST_OFF(t3) ^1da177e Linus Torvalds 2005-04-16 63 li t1, ~ST0_CU1 ^1da177e Linus Torvalds 2005-04-16 64 and t0, t0, t1 ^1da177e Linus Torvalds 2005-04-16 65 LONG_S t0, ST_OFF(t3) ^1da177e Linus Torvalds 2005-04-16 66 c138e12f Atsushi Nemoto 2006-05-23 @67 fpu_save_double a0 t0 t1 # c0_status passed in t0 c138e12f Atsushi Nemoto 2006-05-23 68 # clobbers t1 ^1da177e Linus Torvalds 2005-04-16 69 1: ^1da177e Linus Torvalds 2005-04-16 70 1400eb65 Gregory Fong 2013-06-17 71 #if defined(CONFIG_CC_STACKPROTECTOR) && !defined(CONFIG_SMP) 8b3c569a James Hogan 2013-10-07 72 PTR_LA t8, __stack_chk_guard 1400eb65 Gregory Fong 2013-06-17 73 LONG_L t9, TASK_STACK_CANARY(a1) 1400eb65 Gregory Fong 2013-06-17 74 LONG_S t9, 0(t8) 1400eb65 Gregory Fong 2013-06-17 75 #endif 1400eb65 Gregory Fong 2013-06-17 76 ^1da177e Linus Torvalds 2005-04-16 77 /* ^1da177e Linus Torvalds 2005-04-16 78 * The order of restoring the registers takes care of the race ^1da177e Linus Torvalds 2005-04-16 79 * updating $28, $29 and kernelsp without disabling ints. ^1da177e Linus Torvalds 2005-04-16 80 */ ^1da177e Linus Torvalds 2005-04-16 81 move $28, a2 ^1da177e Linus Torvalds 2005-04-16 82 cpu_restore_nonscratch a1 ^1da177e Linus Torvalds 2005-04-16 83 3bd39664 Ralf Baechle 2007-07-11 84 PTR_ADDU t0, $28, _THREAD_SIZE - 32 ^1da177e Linus Torvalds 2005-04-16 85 set_saved_sp t0, t1, t2 41c594ab Ralf Baechle 2006-04-05 86 #ifdef CONFIG_MIPS_MT_SMTC 41c594ab Ralf Baechle 2006-04-05 87 /* Read-modify-writes of Status must be atomic on a VPE */ 41c594ab Ralf Baechle 2006-04-05 88 mfc0 t2, CP0_TCSTATUS 41c594ab Ralf Baechle 2006-04-05 89 ori t1, t2, TCSTATUS_IXMT 41c594ab Ralf Baechle 2006-04-05 90 mtc0 t1, CP0_TCSTATUS 41c594ab Ralf Baechle 2006-04-05 91 andi t2, t2, TCSTATUS_IXMT 4277ff5e Ralf Baechle 2006-06-03 92 _ehb 41c594ab Ralf Baechle 2006-04-05 93 DMT 8 # dmt t0 41c594ab Ralf Baechle 2006-04-05 94 move t1,ra 41c594ab Ralf Baechle 2006-04-05 95 jal mips_ihb 41c594ab Ralf Baechle 2006-04-05 96 move ra,t1 41c594ab Ralf Baechle 2006-04-05 97 #endif /* CONFIG_MIPS_MT_SMTC */ ^1da177e Linus Torvalds 2005-04-16 98 mfc0 t1, CP0_STATUS /* Do we really need this? */ ^1da177e Linus Torvalds 2005-04-16 99 li a3, 0xff01 ^1da177e Linus Torvalds 2005-04-16 100 and t1, a3 ^1da177e Linus Torvalds 2005-04-16 101 LONG_L a2, THREAD_STATUS(a1) ^1da177e Linus Torvalds 2005-04-16 102 nor a3, $0, a3 ^1da177e Linus Torvalds 2005-04-16 103 and a2, a3 ^1da177e Linus Torvalds 2005-04-16 104 or a2, t1 ^1da177e Linus Torvalds 2005-04-16 105 mtc0 a2, CP0_STATUS 41c594ab Ralf Baechle 2006-04-05 106 #ifdef CONFIG_MIPS_MT_SMTC 4277ff5e Ralf Baechle 2006-06-03 107 _ehb 41c594ab Ralf Baechle 2006-04-05 108 andi t0, t0, VPECONTROL_TE 41c594ab Ralf Baechle 2006-04-05 109 beqz t0, 1f 41c594ab Ralf Baechle 2006-04-05 110 emt 41c594ab Ralf Baechle 2006-04-05 111 1: 41c594ab Ralf Baechle 2006-04-05 112 mfc0 t1, CP0_TCSTATUS 41c594ab Ralf Baechle 2006-04-05 113 xori t1, t1, TCSTATUS_IXMT 41c594ab Ralf Baechle 2006-04-05 114 or t1, t1, t2 41c594ab Ralf Baechle 2006-04-05 115 mtc0 t1, CP0_TCSTATUS 4277ff5e Ralf Baechle 2006-06-03 116 _ehb 41c594ab Ralf Baechle 2006-04-05 117 #endif /* CONFIG_MIPS_MT_SMTC */ ^1da177e Linus Torvalds 2005-04-16 118 move v0, a0 ^1da177e Linus Torvalds 2005-04-16 119 jr ra ^1da177e Linus Torvalds 2005-04-16 120 END(resume) ^1da177e Linus Torvalds 2005-04-16 121 ^1da177e Linus Torvalds 2005-04-16 122 /* ^1da177e Linus Torvalds 2005-04-16 123 * Save a thread's fp context. ^1da177e Linus Torvalds 2005-04-16 124 */ ^1da177e Linus Torvalds 2005-04-16 125 LEAF(_save_fp) 875d43e7 Ralf Baechle 2005-09-03 126 #ifdef CONFIG_64BIT c138e12f Atsushi Nemoto 2006-05-23 127 mfc0 t0, CP0_STATUS ^1da177e Linus Torvalds 2005-04-16 128 #endif c138e12f Atsushi Nemoto 2006-05-23 @129 fpu_save_double a0 t0 t1 # clobbers t1 ^1da177e Linus Torvalds 2005-04-16 130 jr ra ^1da177e Linus Torvalds 2005-04-16 131 END(_save_fp) ^1da177e Linus Torvalds 2005-04-16 132 ^1da177e Linus Torvalds 2005-04-16 133 /* ^1da177e Linus Torvalds 2005-04-16 134 * Restore a thread's fp context. ^1da177e Linus Torvalds 2005-04-16 135 */ ^1da177e Linus Torvalds 2005-04-16 136 LEAF(_restore_fp) c138e12f Atsushi Nemoto 2006-05-23 137 #ifdef CONFIG_64BIT c138e12f Atsushi Nemoto 2006-05-23 138 mfc0 t0, CP0_STATUS c138e12f Atsushi Nemoto 2006-05-23 139 #endif c138e12f Atsushi Nemoto 2006-05-23 @140 fpu_restore_double a0 t0 t1 # clobbers t1 ^1da177e Linus Torvalds 2005-04-16 141 jr ra ^1da177e Linus Torvalds 2005-04-16 142 END(_restore_fp) ^1da177e Linus Torvalds 2005-04-16 143 :::::: The code at line 67 was first introduced by commit :::::: c138e12f3a2e0421a4c8edf02587d2d394418679 [MIPS] Fix fpu_save_double on 64-bit. :::::: TO: Atsushi Nemoto <anemo@xxxxxxxxxxxxx> :::::: CC: Ralf Baechle <ralf@xxxxxxxxxxxxxx> --- 0-DAY kernel test infrastructure Open Source Technology Center https://lists.01.org/pipermail/kbuild-all Intel Corporation
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