git://bbs.cooldavid.org / net-next-2.6.git / blame
| Commit | Line | Data |
|---|---|---|
| b67ad18b RD |
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> |