linux kernel printk

https://www.kernel.org/doc/Documentation/printk-formats.txt

16進位e自動顯示0x
pintk( " %#x " ,hex);

常用

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
s32 %d or %x
u32 %u or %x
s64 %lld or %llx
u64 %llu or %llx

MAC

%pM 00:01:02:03:04:05
%pMF 00-01-02-03-04-05

IPv4
%pI4 1.2.3.4
%pi4 001.002.003.004
%p[Ii]4[hnbl]
The additional ``h``, ``n``, ``b``, and ``l`` specifiers are used to specify
host, network, big or little endian order addresses respectively. Where
no specifier is provided the default network/big endian order is used.

IPv6

%pI6 0001:0002:0003:0004:0005:0006:0007:0008
%pi6 00010002000300040005000600070008
%pI6c 1:2:3:4:5:6:7:8