mirror of
https://github.com/torvalds/linux.git
synced 2024-11-29 15:41:36 +00:00
36 lines
1.0 KiB
Plaintext
36 lines
1.0 KiB
Plaintext
|
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>
|