diff options
| author | John Ogness <john.ogness@linutronix.de> | 2020-09-21 14:18:45 +0300 |
|---|---|---|
| committer | Petr Mladek <pmladek@suse.com> | 2020-09-22 12:27:48 +0300 |
| commit | 74caba7f2a0685575b3ee5330a118f5922485e02 (patch) | |
| tree | eb195b5d665b166c8158af3bcdc151d2b84b447f /include/linux/dev_printk.h | |
| parent | cfe2790b163acdc9c058a63bff310923e84a16b4 (diff) | |
| download | linux-74caba7f2a0685575b3ee5330a118f5922485e02.tar.xz | |
printk: move dictionary keys to dev_printk_info
Dictionaries are only used for SUBSYSTEM and DEVICE properties. The
current implementation stores the property names each time they are
used. This requires more space than otherwise necessary. Also,
because the dictionary entries are currently considered optional,
it cannot be relied upon that they are always available, even if the
writer wanted to store them. These issues will increase should new
dictionary properties be introduced.
Rather than storing the subsystem and device properties in the
dict ring, introduce a struct dev_printk_info with separate fields
to store only the property values. Embed this struct within the
struct printk_info to provide guaranteed availability.
Signed-off-by: John Ogness <john.ogness@linutronix.de>
Reviewed-by: Petr Mladek <pmladek@suse.com>
Signed-off-by: Petr Mladek <pmladek@suse.com>
Link: https://lore.kernel.org/r/87mu1jl6ne.fsf@jogness.linutronix.de
Diffstat (limited to 'include/linux/dev_printk.h')
| -rw-r--r-- | include/linux/dev_printk.h | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/include/linux/dev_printk.h b/include/linux/dev_printk.h index 3028b644b4fb..6f009559ee54 100644 --- a/include/linux/dev_printk.h +++ b/include/linux/dev_printk.h @@ -21,6 +21,14 @@ struct device; +#define PRINTK_INFO_SUBSYSTEM_LEN 16 +#define PRINTK_INFO_DEVICE_LEN 48 + +struct dev_printk_info { + char subsystem[PRINTK_INFO_SUBSYSTEM_LEN]; + char device[PRINTK_INFO_DEVICE_LEN]; +}; + #ifdef CONFIG_PRINTK __printf(3, 0) __cold |