mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-08-21 08:19:28 +00:00
![Randy Dunlap](/assets/img/avatar_default.png)
Add printk-formats.txt so that we don't have to keep fixing the same things over and over again. <wishful thinking> Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com> Cc: Alexey Dobriyan <adobriyan@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
35 lines
1 KiB
Text
35 lines
1 KiB
Text
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>
|