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vsprintf: Tweak pF/pf comment 

Reflect changes that have happened to pf/pF (deprecation)
specifiers in pointer() comment section.

Link: http://lkml.kernel.org/r/20180414030005.25831-1-sergey.senozhatsky@gmail.com
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Joe Perches <joe@perches.com>
Cc: linux-kernel@vger.kernel.org
Signed-off-by: Sergey Senozhatsky <sergey.senozhatsky@gmail.com>
Signed-off-by: Petr Mladek <pmladek@suse.com>
This commit is contained in:
Sergey Senozhatsky 2018-04-14 12:00:05 +09:00 committed by Petr Mladek
parent 7e6bd6f3dc
commit cdb7e52d96
1 changed files with 4 additions and 8 deletions
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12
lib/vsprintf.c
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@ -1713,10 +1713,10 @@ static char *ptr_to_id(char *buf, char *end, void *ptr, struct printf_spec spec)
*
* Right now we handle:
*
* - 'F' For symbolic function descriptor pointers with offset
* - 'f' For simple symbolic function names without offset
* - 'S' For symbolic direct pointers with offset
* - 's' For symbolic direct pointers without offset
* - 'S' For symbolic direct pointers (or function descriptors) with offset
* - 's' For symbolic direct pointers (or function descriptors) without offset
* - 'F' Same as 'S'
* - 'f' Same as 's'
* - '[FfSs]R' as above with __builtin_extract_return_addr() translation
* - 'B' For backtraced symbolic direct pointers with offset
* - 'R' For decoded struct resource, e.g., [mem 0x0-0x1f 64bit pref]
@ -1813,10 +1813,6 @@ static char *ptr_to_id(char *buf, char *end, void *ptr, struct printf_spec spec)
* ** When making changes please also update:
* Documentation/core-api/printk-formats.rst
*
* Note: The difference between 'S' and 'F' is that on ia64 and ppc64
* function pointers are really function descriptors, which contain a
* pointer to the real address.
*
* Note: The default behaviour (unadorned %p) is to hash the address,
* rendering it useful as a unique identifier.
*/