| If variable is of Type, use printk format specifier: |
| --------------------------------------------------------- |
| int %d or %x |
| unsigned int %u or %x |
| long %ld or %lx |
| unsigned long %lu or %lx |
| long long %lld or %llx |
| unsigned long long %llu or %llx |
| size_t %zu or %zx |
| ssize_t %zd or %zx |
| |
| Raw pointer value SHOULD be printed with %p. |
| |
| u64 SHOULD be printed with %llu/%llx, (unsigned long long): |
| |
| printk("%llu", (unsigned long long)u64_var); |
| |
| s64 SHOULD be printed with %lld/%llx, (long long): |
| |
| printk("%lld", (long long)s64_var); |
| |
| If <type> is dependent on a config option for its size (e.g., sector_t, |
| blkcnt_t, phys_addr_t, resource_size_t) or is architecture-dependent |
| for its size (e.g., tcflag_t), use a format specifier of its largest |
| possible type and explicitly cast to it. Example: |
| |
| printk("test: sector number/total blocks: %llu/%llu\n", |
| (unsigned long long)sector, (unsigned long long)blockcount); |
| |
| Reminder: sizeof() result is of type size_t. |
| |
| Thank you for your cooperation and attention. |
| |
| |
| By Randy Dunlap <rdunlap@xenotime.net> |