diff options
Diffstat (limited to 'Documentation/printk-formats.txt')
| -rw-r--r-- | Documentation/printk-formats.txt | 18 |
1 files changed, 14 insertions, 4 deletions
diff --git a/Documentation/printk-formats.txt b/Documentation/printk-formats.txt index 8ffb274367c7..3af5ae6c9c11 100644 --- a/Documentation/printk-formats.txt +++ b/Documentation/printk-formats.txt @@ -17,6 +17,8 @@ Symbols/Function Pointers: %pF versatile_init+0x0/0x110 %pf versatile_init %pS versatile_init+0x0/0x110 + %pSR versatile_init+0x9/0x110 + (with __builtin_extract_return_addr() translation) %ps versatile_init %pB prev_fn_of_versatile_init+0x88/0x88 @@ -53,6 +55,14 @@ 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. +Physical addresses: + + %pa 0x01234567 or 0x0123456789abcdef + + For printing a phys_addr_t type (and its derivatives, such as + resource_size_t) which can vary based on build options, regardless of + the width of the CPU data path. Passed by reference. + Raw buffer as a hex string: %*ph 00 01 02 ... 3f %*phC 00:01:02: ... :3f @@ -150,9 +160,9 @@ 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: +blkcnt_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); @@ -162,5 +172,5 @@ Reminder: sizeof() result is of type size_t. Thank you for your cooperation and attention. -By Randy Dunlap <rdunlap@xenotime.net> and +By Randy Dunlap <rdunlap@infradead.org> and Andrew Murray <amurray@mpc-data.co.uk> |