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| -rw-r--r-- | Documentation/printk-formats.txt | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/Documentation/printk-formats.txt b/Documentation/printk-formats.txt index 5a615c14f75d..71438f3eb0c0 100644 --- a/Documentation/printk-formats.txt +++ b/Documentation/printk-formats.txt @@ -54,6 +54,7 @@ Struct Resources: For printing struct resources. The 'R' and 'r' specifiers result in a printed resource with ('R') or without ('r') a decoded flags member. + Passed by reference. Physical addresses types phys_addr_t: @@ -132,6 +133,8 @@ MAC/FDDI addresses: specifier to use reversed byte order suitable for visual interpretation of Bluetooth addresses which are in the little endian order. + Passed by reference. + IPv4 addresses: %pI4 1.2.3.4 @@ -146,6 +149,8 @@ IPv4 addresses: host, network, big or little endian order addresses respectively. Where no specifier is provided the default network/big endian order is used. + Passed by reference. + IPv6 addresses: %pI6 0001:0002:0003:0004:0005:0006:0007:0008 @@ -160,6 +165,8 @@ IPv6 addresses: print a compressed IPv6 address as described by http://tools.ietf.org/html/rfc5952 + Passed by reference. + IPv4/IPv6 addresses (generic, with port, flowinfo, scope): %pIS 1.2.3.4 or 0001:0002:0003:0004:0005:0006:0007:0008 @@ -186,6 +193,8 @@ IPv4/IPv6 addresses (generic, with port, flowinfo, scope): specifiers can be used as well and are ignored in case of an IPv6 address. + Passed by reference. + Further examples: %pISfc 1.2.3.4 or [1:2:3:4:5:6:7:8]/123456789 @@ -207,6 +216,8 @@ UUID/GUID addresses: Where no additional specifiers are used the default little endian order with lower case hex characters will be printed. + Passed by reference. + dentry names: %pd{,2,3,4} %pD{,2,3,4} @@ -216,6 +227,8 @@ dentry names: equivalent of %s dentry->d_name.name we used to use, %pd<n> prints n last components. %pD does the same thing for struct file. + Passed by reference. + struct va_format: %pV @@ -231,6 +244,8 @@ struct va_format: Do not use this feature without some mechanism to verify the correctness of the format string and va_list arguments. + Passed by reference. + u64 SHOULD be printed with %llu/%llx: printk("%llu", u64_var); |