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1 | If variable is of Type, use printk format specifier: |
2 | --------------------------------------------------------- |
3 | int %d or %x |
4 | unsigned int %u or %x |
5 | long %ld or %lx |
6 | unsigned long %lu or %lx |
7 | long long %lld or %llx |
8 | unsigned long long %llu or %llx |
9 | size_t %zu or %zx |
10 | ssize_t %zd or %zx |
11 | |
12 | Raw pointer value SHOULD be printed with %p. |
13 | |
14 | u64 SHOULD be printed with %llu/%llx, (unsigned long long): |
15 | |
16 | printk("%llu", (unsigned long long)u64_var); |
17 | |
18 | s64 SHOULD be printed with %lld/%llx, (long long): |
19 | |
20 | printk("%lld", (long long)s64_var); |
21 | |
22 | If <type> is dependent on a config option for its size (e.g., sector_t, |
23 | blkcnt_t, phys_addr_t, resource_size_t) or is architecture-dependent |
24 | for its size (e.g., tcflag_t), use a format specifier of its largest |
25 | possible type and explicitly cast to it. Example: |
26 | |
27 | printk("test: sector number/total blocks: %llu/%llu\n", |
28 | (unsigned long long)sector, (unsigned long long)blockcount); |
29 | |
30 | Reminder: sizeof() result is of type size_t. |
31 | |
32 | Thank you for your cooperation and attention. |
33 | |
34 | |
35 | By Randy Dunlap <rdunlap@xenotime.net> |
36 |
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Tags:
od-2011-09-04
od-2011-09-18
v2.6.34-rc5
v2.6.34-rc6
v2.6.34-rc7
v3.9