* [atishp04:isa_framework 3/8] arch/riscv/kernel/cpufeature.c:153:19: warning: Branch condition evaluates to a garbage value [clang-analyzer-core.uninitialized.Branch]
@ 2022-02-10 17:22 kernel test robot
0 siblings, 0 replies; only message in thread
From: kernel test robot @ 2022-02-10 17:22 UTC (permalink / raw)
To: kbuild
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CC: llvm(a)lists.linux.dev
CC: kbuild-all(a)lists.01.org
CC: Atish Patra <Atish.Patra@wdc.com>
CC: linux-kernel(a)vger.kernel.org
TO: Tsukasa OI <research_trasio@irq.a4lg.com>
CC: Atish Patra <atishp@rivosinc.com>
tree: https://github.com/atishp04/linux isa_framework
head: 44c1fe0a3dd4148430c3b2e161d97b27f0095e07
commit: 8ab665498145b5628aa844456ec9ec3b6594e879 [3/8] riscv: cpufeature: Minimal parser for "riscv, isa" strings
:::::: branch date: 9 hours ago
:::::: commit date: 18 hours ago
config: riscv-randconfig-c006-20220209 (https://download.01.org/0day-ci/archive/20220211/202202110140.ppKC5Jch-lkp(a)intel.com/config)
compiler: clang version 15.0.0 (https://github.com/llvm/llvm-project aa845d7a245d85c441d0bd44fc7b6c3be8f3de8d)
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
# install riscv cross compiling tool for clang build
# apt-get install binutils-riscv64-linux-gnu
# https://github.com/atishp04/linux/commit/8ab665498145b5628aa844456ec9ec3b6594e879
git remote add atishp04 https://github.com/atishp04/linux
git fetch --no-tags atishp04 isa_framework
git checkout 8ab665498145b5628aa844456ec9ec3b6594e879
# save the config file to linux build tree
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=riscv clang-analyzer
If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@intel.com>
clang-analyzer warnings: (new ones prefixed by >>)
^~~~~~~~~~
fs/xfs/xfs_fsmap.c:744:2: note: Taking true branch
if (info->last)
^
fs/xfs/xfs_fsmap.c:745:44: note: Passing null pointer value via 1st parameter 'cur'
return xfs_getfsmap_datadev_bnobt_helper(*curpp, &key[1], info);
^~~~~~
fs/xfs/xfs_fsmap.c:745:10: note: Calling 'xfs_getfsmap_datadev_bnobt_helper'
return xfs_getfsmap_datadev_bnobt_helper(*curpp, &key[1], info);
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
fs/xfs/xfs_fsmap.c:371:26: note: Access to field 'bc_mp' results in a dereference of a null pointer (loaded from variable 'cur')
struct xfs_mount *mp = cur->bc_mp;
^~~
Suppressed 9 warnings (2 in non-user code, 7 with check filters).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
9 warnings generated.
Suppressed 9 warnings (2 in non-user code, 7 with check filters).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
9 warnings generated.
Suppressed 9 warnings (2 in non-user code, 7 with check filters).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
9 warnings generated.
Suppressed 9 warnings (2 in non-user code, 7 with check filters).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
9 warnings generated.
Suppressed 9 warnings (2 in non-user code, 7 with check filters).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
9 warnings generated.
Suppressed 9 warnings (2 in non-user code, 7 with check filters).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
11 warnings generated.
fs/coda/dir.c:387:4: warning: Value stored to 'ret' is never read [clang-analyzer-deadcode.DeadStores]
ret = -EBADF;
^ ~~~~~~
fs/coda/dir.c:387:4: note: Value stored to 'ret' is never read
ret = -EBADF;
^ ~~~~~~
fs/coda/dir.c:394:4: warning: Value stored to 'ret' is never read [clang-analyzer-deadcode.DeadStores]
ret = -EBADF;
^ ~~~~~~
fs/coda/dir.c:394:4: note: Value stored to 'ret' is never read
ret = -EBADF;
^ ~~~~~~
Suppressed 9 warnings (2 in non-user code, 7 with check filters).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
9 warnings generated.
Suppressed 9 warnings (2 in non-user code, 7 with check filters).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
21 warnings generated.
fs/coda/upcall.c:259:9: warning: Value stored to 's' is never read [clang-analyzer-deadcode.DeadStores]
s = ( new_length & ~0x3) +4; /* round up to word boundary */
^ ~~~~~~~~~~~~~~~~~~~~~~~
fs/coda/upcall.c:259:9: note: Value stored to 's' is never read
s = ( new_length & ~0x3) +4; /* round up to word boundary */
^ ~~~~~~~~~~~~~~~~~~~~~~~
fs/coda/upcall.c:430:9: warning: Value stored to 's' is never read [clang-analyzer-deadcode.DeadStores]
s = (len & ~0x3) + 4;
^ ~~~~~~~~~~~~~~~~
fs/coda/upcall.c:430:9: note: Value stored to 's' is never read
s = (len & ~0x3) + 4;
^ ~~~~~~~~~~~~~~~~
Suppressed 19 warnings (2 in non-user code, 17 with check filters).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
9 warnings generated.
Suppressed 9 warnings (2 in non-user code, 7 with check filters).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
9 warnings generated.
Suppressed 9 warnings (2 in non-user code, 7 with check filters).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
9 warnings generated.
Suppressed 9 warnings (2 in non-user code, 7 with check filters).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
2 warnings generated.
Suppressed 2 warnings (2 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
11 warnings generated.
init/do_mounts.c:194:2: warning: Call to function 'strcpy' is insecure as it does not provide bounding of the memory buffer. Replace unbounded copy functions with analogous functions that support length arguments such as 'strlcpy'. CWE-119 [clang-analyzer-security.insecureAPI.strcpy]
strcpy(s, name);
^~~~~~
init/do_mounts.c:194:2: note: Call to function 'strcpy' is insecure as it does not provide bounding of the memory buffer. Replace unbounded copy functions with analogous functions that support length arguments such as 'strlcpy'. CWE-119
strcpy(s, name);
^~~~~~
Suppressed 10 warnings (3 in non-user code, 7 with check filters).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
9 warnings generated.
Suppressed 9 warnings (2 in non-user code, 7 with check filters).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
3 warnings generated.
Suppressed 3 warnings (2 in non-user code, 1 with check filters).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
9 warnings generated.
Suppressed 9 warnings (2 in non-user code, 7 with check filters).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
2 warnings generated.
Suppressed 2 warnings (2 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
2 warnings generated.
Suppressed 2 warnings (2 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
3 warnings generated.
>> arch/riscv/kernel/cpufeature.c:153:19: warning: Branch condition evaluates to a garbage value [clang-analyzer-core.uninitialized.Branch]
if (ext_err || ext_long)
^~~~~~~~
arch/riscv/kernel/cpufeature.c:84:23: note: Assuming 'node' is not equal to null
for_each_of_cpu_node(node) {
^
include/linux/of.h:1375:41: note: expanded from macro 'for_each_of_cpu_node'
for (cpu = of_get_next_cpu_node(NULL); cpu != NULL; \
^~~~~~~~~~~
arch/riscv/kernel/cpufeature.c:84:2: note: Loop condition is true. Entering loop body
for_each_of_cpu_node(node) {
^
include/linux/of.h:1375:2: note: expanded from macro 'for_each_of_cpu_node'
for (cpu = of_get_next_cpu_node(NULL); cpu != NULL; \
^
arch/riscv/kernel/cpufeature.c:88:7: note: Assuming the condition is false
if (riscv_of_processor_hartid(node) < 0)
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
arch/riscv/kernel/cpufeature.c:88:3: note: Taking false branch
if (riscv_of_processor_hartid(node) < 0)
^
arch/riscv/kernel/cpufeature.c:91:7: note: Assuming the condition is false
if (of_property_read_string(node, "riscv,isa", &isa)) {
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
arch/riscv/kernel/cpufeature.c:91:3: note: Taking false branch
if (of_property_read_string(node, "riscv,isa", &isa)) {
^
arch/riscv/kernel/cpufeature.c:100:7: note: Assuming the condition is false
if (!strncmp(isa, "rv64", 4))
^~~~~~~~~~~~~~~~~~~~~~~~
arch/riscv/kernel/cpufeature.c:100:3: note: Taking false branch
if (!strncmp(isa, "rv64", 4))
^
arch/riscv/kernel/cpufeature.c:103:3: note: Loop condition is true. Entering loop body
for (; *isa; ++isa) {
^
arch/riscv/kernel/cpufeature.c:105:9: note: 'ext_long' declared without an initial value
bool ext_long, ext_err = false;
^~~~~~~~
arch/riscv/kernel/cpufeature.c:107:4: note: Control jumps to 'case 115:' @line 108
switch (*ext) {
^
arch/riscv/kernel/cpufeature.c:117:9: note: Left side of '&&' is true
if (*ext == 's' && ext[-1] != '_')
^
arch/riscv/kernel/cpufeature.c:117:24: note: Assuming the condition is true
if (*ext == 's' && ext[-1] != '_')
^~~~~~~~~~~~~~
arch/riscv/kernel/cpufeature.c:117:5: note: Taking true branch
if (*ext == 's' && ext[-1] != '_')
^
arch/riscv/kernel/cpufeature.c:118:6: note: Execution continues on line 147
break;
^
arch/riscv/kernel/cpufeature.c:147:8: note: Assuming the condition is false
if (*isa != '_')
^~~~~~~~~~~
arch/riscv/kernel/cpufeature.c:147:4: note: Taking false branch
if (*isa != '_')
^
arch/riscv/kernel/cpufeature.c:153:8: note: 'ext_err' is false
if (ext_err || ext_long)
^~~~~~~
arch/riscv/kernel/cpufeature.c:153:8: note: Left side of '||' is false
arch/riscv/kernel/cpufeature.c:153:19: note: Branch condition evaluates to a garbage value
if (ext_err || ext_long)
^~~~~~~~
Suppressed 2 warnings (2 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
9 warnings generated.
Suppressed 9 warnings (2 in non-user code, 7 with check filters).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
10 warnings generated.
security/tomoyo/file.c:137:2: warning: Call to function 'strcat' is insecure as it does not provide bounding of the memory buffer. Replace unbounded copy functions with analogous functions that support length arguments such as 'strlcat'. CWE-119 [clang-analyzer-security.insecureAPI.strcpy]
strcat((char *) buf->name, "/");
^~~~~~
security/tomoyo/file.c:137:2: note: Call to function 'strcat' is insecure as it does not provide bounding of the memory buffer. Replace unbounded copy functions with analogous functions that support length arguments such as 'strlcat'. CWE-119
strcat((char *) buf->name, "/");
^~~~~~
Suppressed 9 warnings (2 in non-user code, 7 with check filters).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
9 warnings generated.
Suppressed 9 warnings (2 in non-user code, 7 with check filters).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
9 warnings generated.
Suppressed 9 warnings (2 in non-user code, 7 with check filters).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
9 warnings generated.
Suppressed 9 warnings (2 in non-user code, 7 with check filters).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
9 warnings generated.
Suppressed 9 warnings (2 in non-user code, 7 with check filters).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
12 warnings generated.
fs/fat/dir.c:45:18: warning: Access to field 'b_blocknr' results in a dereference of a null pointer (loaded from variable 'bh') [clang-analyzer-core.NullDereference]
return ((loff_t)bh->b_blocknr << MSDOS_SB(sb)->dir_per_block_bits)
^
fs/fat/dir.c:1298:9: note: Calling 'fat_get_entry'
while (fat_get_entry(dir, &pos, &bh, &de) > -1) {
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
fs/fat/dir.c:121:10: note: Left side of '&&' is false
vim +153 arch/riscv/kernel/cpufeature.c
6bcff51539ccae Anup Patel 2020-04-24 64
3df952ae2ac81f Jisheng Zhang 2021-05-16 65 void __init riscv_fill_hwcap(void)
e2c0cdfba7f699 Palmer Dabbelt 2017-07-10 66 {
dd81c8ab819d36 Johan Hovold 2019-01-18 67 struct device_node *node;
e2c0cdfba7f699 Palmer Dabbelt 2017-07-10 68 const char *isa;
539af61430f4e3 Tsukasa OI 2021-12-02 69 char print_str[NUM_ALPHA_EXTS + 1];
8ab665498145b5 Tsukasa OI 2021-12-02 70 int i, j;
e2c0cdfba7f699 Palmer Dabbelt 2017-07-10 71 static unsigned long isa2hwcap[256] = {0};
e2c0cdfba7f699 Palmer Dabbelt 2017-07-10 72
e2c0cdfba7f699 Palmer Dabbelt 2017-07-10 73 isa2hwcap['i'] = isa2hwcap['I'] = COMPAT_HWCAP_ISA_I;
e2c0cdfba7f699 Palmer Dabbelt 2017-07-10 74 isa2hwcap['m'] = isa2hwcap['M'] = COMPAT_HWCAP_ISA_M;
e2c0cdfba7f699 Palmer Dabbelt 2017-07-10 75 isa2hwcap['a'] = isa2hwcap['A'] = COMPAT_HWCAP_ISA_A;
e2c0cdfba7f699 Palmer Dabbelt 2017-07-10 76 isa2hwcap['f'] = isa2hwcap['F'] = COMPAT_HWCAP_ISA_F;
e2c0cdfba7f699 Palmer Dabbelt 2017-07-10 77 isa2hwcap['d'] = isa2hwcap['D'] = COMPAT_HWCAP_ISA_D;
e2c0cdfba7f699 Palmer Dabbelt 2017-07-10 78 isa2hwcap['c'] = isa2hwcap['C'] = COMPAT_HWCAP_ISA_C;
e2c0cdfba7f699 Palmer Dabbelt 2017-07-10 79
e2c0cdfba7f699 Palmer Dabbelt 2017-07-10 80 elf_hwcap = 0;
e2c0cdfba7f699 Palmer Dabbelt 2017-07-10 81
6bcff51539ccae Anup Patel 2020-04-24 82 bitmap_zero(riscv_isa, RISCV_ISA_EXT_MAX);
6bcff51539ccae Anup Patel 2020-04-24 83
dd81c8ab819d36 Johan Hovold 2019-01-18 84 for_each_of_cpu_node(node) {
fbdc6193dc706c Atish Patra 2019-02-22 85 unsigned long this_hwcap = 0;
6bcff51539ccae Anup Patel 2020-04-24 86 unsigned long this_isa = 0;
fbdc6193dc706c Atish Patra 2019-02-22 87
fbdc6193dc706c Atish Patra 2019-02-22 88 if (riscv_of_processor_hartid(node) < 0)
fbdc6193dc706c Atish Patra 2019-02-22 89 continue;
e2c0cdfba7f699 Palmer Dabbelt 2017-07-10 90
e2c0cdfba7f699 Palmer Dabbelt 2017-07-10 91 if (of_property_read_string(node, "riscv,isa", &isa)) {
7265d103902c0b Johan Hovold 2019-01-18 92 pr_warn("Unable to find \"riscv,isa\" devicetree entry\n");
fbdc6193dc706c Atish Patra 2019-02-22 93 continue;
e2c0cdfba7f699 Palmer Dabbelt 2017-07-10 94 }
e2c0cdfba7f699 Palmer Dabbelt 2017-07-10 95
6bcff51539ccae Anup Patel 2020-04-24 96 #if IS_ENABLED(CONFIG_32BIT)
6bcff51539ccae Anup Patel 2020-04-24 97 if (!strncmp(isa, "rv32", 4))
8ab665498145b5 Tsukasa OI 2021-12-02 98 isa += 4;
6bcff51539ccae Anup Patel 2020-04-24 99 #elif IS_ENABLED(CONFIG_64BIT)
6bcff51539ccae Anup Patel 2020-04-24 100 if (!strncmp(isa, "rv64", 4))
8ab665498145b5 Tsukasa OI 2021-12-02 101 isa += 4;
6bcff51539ccae Anup Patel 2020-04-24 102 #endif
8ab665498145b5 Tsukasa OI 2021-12-02 103 for (; *isa; ++isa) {
8ab665498145b5 Tsukasa OI 2021-12-02 104 const char *ext = isa++;
8ab665498145b5 Tsukasa OI 2021-12-02 105 bool ext_long, ext_err = false;
8ab665498145b5 Tsukasa OI 2021-12-02 106
8ab665498145b5 Tsukasa OI 2021-12-02 107 switch (*ext) {
8ab665498145b5 Tsukasa OI 2021-12-02 108 case 's':
8ab665498145b5 Tsukasa OI 2021-12-02 109 case 'x':
8ab665498145b5 Tsukasa OI 2021-12-02 110 case 'z':
8ab665498145b5 Tsukasa OI 2021-12-02 111 /**
8ab665498145b5 Tsukasa OI 2021-12-02 112 * 's' is a special case because:
8ab665498145b5 Tsukasa OI 2021-12-02 113 * It can be present in base extension for supervisor
8ab665498145b5 Tsukasa OI 2021-12-02 114 * Multi-letter extensions can start with 's' as well for
8ab665498145b5 Tsukasa OI 2021-12-02 115 * Supervisor extensions (i.e. sstc, sscofpmf, svinval)
8ab665498145b5 Tsukasa OI 2021-12-02 116 */
8ab665498145b5 Tsukasa OI 2021-12-02 117 if (*ext == 's' && ext[-1] != '_')
8ab665498145b5 Tsukasa OI 2021-12-02 118 break;
8ab665498145b5 Tsukasa OI 2021-12-02 119 ext_long = true;
8ab665498145b5 Tsukasa OI 2021-12-02 120 /* Multi-letter extension must be delimited */
8ab665498145b5 Tsukasa OI 2021-12-02 121 for (; *isa && *isa != '_'; ++isa)
8ab665498145b5 Tsukasa OI 2021-12-02 122 if (!islower(*isa) && !isdigit(*isa))
8ab665498145b5 Tsukasa OI 2021-12-02 123 ext_err = true;
8ab665498145b5 Tsukasa OI 2021-12-02 124 /* ... but must be ignored. */
8ab665498145b5 Tsukasa OI 2021-12-02 125 break;
8ab665498145b5 Tsukasa OI 2021-12-02 126 default:
8ab665498145b5 Tsukasa OI 2021-12-02 127 ext_long = false;
8ab665498145b5 Tsukasa OI 2021-12-02 128 if (!islower(*ext)) {
8ab665498145b5 Tsukasa OI 2021-12-02 129 ext_err = true;
8ab665498145b5 Tsukasa OI 2021-12-02 130 break;
8ab665498145b5 Tsukasa OI 2021-12-02 131 }
8ab665498145b5 Tsukasa OI 2021-12-02 132 /* Find next extension */
8ab665498145b5 Tsukasa OI 2021-12-02 133 if (!isdigit(*isa))
8ab665498145b5 Tsukasa OI 2021-12-02 134 break;
8ab665498145b5 Tsukasa OI 2021-12-02 135 while (isdigit(*++isa))
8ab665498145b5 Tsukasa OI 2021-12-02 136 ;
8ab665498145b5 Tsukasa OI 2021-12-02 137 if (*isa != 'p')
8ab665498145b5 Tsukasa OI 2021-12-02 138 break;
8ab665498145b5 Tsukasa OI 2021-12-02 139 if (!isdigit(*++isa)) {
8ab665498145b5 Tsukasa OI 2021-12-02 140 --isa;
8ab665498145b5 Tsukasa OI 2021-12-02 141 break;
8ab665498145b5 Tsukasa OI 2021-12-02 142 }
8ab665498145b5 Tsukasa OI 2021-12-02 143 while (isdigit(*++isa))
8ab665498145b5 Tsukasa OI 2021-12-02 144 ;
8ab665498145b5 Tsukasa OI 2021-12-02 145 break;
8ab665498145b5 Tsukasa OI 2021-12-02 146 }
8ab665498145b5 Tsukasa OI 2021-12-02 147 if (*isa != '_')
8ab665498145b5 Tsukasa OI 2021-12-02 148 --isa;
6bcff51539ccae Anup Patel 2020-04-24 149 /*
8ab665498145b5 Tsukasa OI 2021-12-02 150 * TODO: Full version-aware handling including
8ab665498145b5 Tsukasa OI 2021-12-02 151 * multi-letter extensions will be added in-future.
6bcff51539ccae Anup Patel 2020-04-24 152 */
8ab665498145b5 Tsukasa OI 2021-12-02 @153 if (ext_err || ext_long)
8ab665498145b5 Tsukasa OI 2021-12-02 154 continue;
8ab665498145b5 Tsukasa OI 2021-12-02 155 this_hwcap |= isa2hwcap[(unsigned char)(*ext)];
8ab665498145b5 Tsukasa OI 2021-12-02 156 this_isa |= (1UL << (*ext - 'a'));
6bcff51539ccae Anup Patel 2020-04-24 157 }
fbdc6193dc706c Atish Patra 2019-02-22 158
fbdc6193dc706c Atish Patra 2019-02-22 159 /*
fbdc6193dc706c Atish Patra 2019-02-22 160 * All "okay" hart should have same isa. Set HWCAP based on
fbdc6193dc706c Atish Patra 2019-02-22 161 * common capabilities of every "okay" hart, in case they don't
fbdc6193dc706c Atish Patra 2019-02-22 162 * have.
fbdc6193dc706c Atish Patra 2019-02-22 163 */
fbdc6193dc706c Atish Patra 2019-02-22 164 if (elf_hwcap)
fbdc6193dc706c Atish Patra 2019-02-22 165 elf_hwcap &= this_hwcap;
fbdc6193dc706c Atish Patra 2019-02-22 166 else
fbdc6193dc706c Atish Patra 2019-02-22 167 elf_hwcap = this_hwcap;
6bcff51539ccae Anup Patel 2020-04-24 168
6bcff51539ccae Anup Patel 2020-04-24 169 if (riscv_isa[0])
6bcff51539ccae Anup Patel 2020-04-24 170 riscv_isa[0] &= this_isa;
6bcff51539ccae Anup Patel 2020-04-24 171 else
6bcff51539ccae Anup Patel 2020-04-24 172 riscv_isa[0] = this_isa;
fbdc6193dc706c Atish Patra 2019-02-22 173 }
e2c0cdfba7f699 Palmer Dabbelt 2017-07-10 174
86e581e3107857 Palmer Dabbelt 2018-08-27 175 /* We don't support systems with F but without D, so mask those out
86e581e3107857 Palmer Dabbelt 2018-08-27 176 * here. */
86e581e3107857 Palmer Dabbelt 2018-08-27 177 if ((elf_hwcap & COMPAT_HWCAP_ISA_F) && !(elf_hwcap & COMPAT_HWCAP_ISA_D)) {
7265d103902c0b Johan Hovold 2019-01-18 178 pr_info("This kernel does not support systems with F but not D\n");
86e581e3107857 Palmer Dabbelt 2018-08-27 179 elf_hwcap &= ~COMPAT_HWCAP_ISA_F;
86e581e3107857 Palmer Dabbelt 2018-08-27 180 }
86e581e3107857 Palmer Dabbelt 2018-08-27 181
6bcff51539ccae Anup Patel 2020-04-24 182 memset(print_str, 0, sizeof(print_str));
539af61430f4e3 Tsukasa OI 2021-12-02 183 for (i = 0, j = 0; i < NUM_ALPHA_EXTS; i++)
6bcff51539ccae Anup Patel 2020-04-24 184 if (riscv_isa[0] & BIT_MASK(i))
6bcff51539ccae Anup Patel 2020-04-24 185 print_str[j++] = (char)('a' + i);
6bcff51539ccae Anup Patel 2020-04-24 186 pr_info("riscv: ISA extensions %s\n", print_str);
6bcff51539ccae Anup Patel 2020-04-24 187
6bcff51539ccae Anup Patel 2020-04-24 188 memset(print_str, 0, sizeof(print_str));
539af61430f4e3 Tsukasa OI 2021-12-02 189 for (i = 0, j = 0; i < NUM_ALPHA_EXTS; i++)
6bcff51539ccae Anup Patel 2020-04-24 190 if (elf_hwcap & BIT_MASK(i))
6bcff51539ccae Anup Patel 2020-04-24 191 print_str[j++] = (char)('a' + i);
6bcff51539ccae Anup Patel 2020-04-24 192 pr_info("riscv: ELF capabilities %s\n", print_str);
9411ec60c23d86 Alan Kao 2018-10-09 193
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0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org
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2022-02-10 17:22 [atishp04:isa_framework 3/8] arch/riscv/kernel/cpufeature.c:153:19: warning: Branch condition evaluates to a garbage value [clang-analyzer-core.uninitialized.Branch] kernel test robot
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