Re: [PATCH v2 2/2] lib/uuid.c: eliminate uuid_[bl]e_index arrays

kbuild test robot
2016-06-04T05:57:18Z

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Hi,

[auto build test WARNING on v4.7-rc1]
[cannot apply to next-20160603]
[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/George-Spelvin/Clean-up-and-shrink-uuid-input-output/20160604-131729
config: x86_64-lkp (attached as .config)
compiler: gcc-4.9 (Debian 4.9.3-14) 4.9.3
reproduce:
# save the attached .config to linux build tree
make ARCH=x86_64

All warnings (new ones prefixed by >>):

lib/uuid.c: In function '__uuid_to_bin':
>> lib/uuid.c:107:3: warning: ignoring return value of 'hex2bin', declared with attribute warn_unused_result [-Wunused-result]
hex2bin(b + i, uuid + pos[i], 1);
^

vim +/hex2bin +107 lib/uuid.c

91 return true;
92 }
93 EXPORT_SYMBOL(uuid_is_valid);
94
95 /* For each binary byte, string offset in ASCII UUID where it appears */
96 const u8 uuid_be_pos[16] = {0,2,4,6,9,11,14,16,19,21,24,26,28,30,32,34};
97 const u8 uuid_le_pos[16] = {6,4,2,0,11,9,16,14,19,21,24,26,28,30,32,34};
98
99 static int __uuid_to_bin(const char uuid[36], __u8 b[16], const u8 pos[16])
100 {
101 unsigned int i;
102
103 if (!uuid_is_valid(uuid))
104 return -EINVAL;
105
106 for (i = 0; i < 16; i++)
> 107 hex2bin(b + i, uuid + pos[i], 1);
108
109 return 0;
110 }
111
112 int uuid_le_to_bin(const char *uuid, uuid_le *u)
113 {
114 return __uuid_to_bin(uuid, u->b, uuid_le_pos);
115 }

---
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