linux/kernel/printk.c, branch v2.6.25

Fix locking bug in "acquire_console_semaphore_for_printk()"

2008-04-15T20:09:54Z

When I cleaned up printk() and split up the printk locking logic in commit 266c2e0abeca649fa6667a1a427ad1da507c6375 ("Make printk() console semaphore accesses sensible") I had incorrectly moved the call to have_callable_console() outside of the console semaphore. That was buggy. The console semaphore protects the console_drivers list that is used by have_callable_console(). Thanks go to Bongani Hlope who saw this as a hang on shutdown and reboot and bisected the bug to the right commit, and tested this patch. See http://lkml.org/lkml/2008/4/11/315 Bisected-and-tested-by: Bongani Hlope Cc: Alexey Dobriyan Signed-off-by: Linus Torvalds

Make printk() console semaphore accesses sensible

2008-03-25T02:25:08Z

The printk() logic on when/how to get the console semaphore was unreadable, this splits the code up into a few helper functions and makes it easier to follow what is going on. Signed-off-by: Linus Torvalds

printk: fix possible printk overrun

2008-02-26T15:42:37Z

printk recursion detection prepends message to printk_buf and offsets printk_buf when actual message is printed but it forgets to trim buffer length accordingly. This can result in overrun in extreme cases. Fix it. [ mingo@elte.hu: bug was introduced by me via: commit 32a76006683f7b28ae3cc491da37716e002f198e Author: Ingo Molnar Date: Fri Jan 25 21:07:58 2008 +0100 printk: make printk more robust by not allowing recursion ] Signed-off-by: Tejun Heo Signed-off-by: Ingo Molnar Signed-off-by: Linus Torvalds

printk_ratelimit() functions should use CONFIG_PRINTK

2008-02-08T17:22:39Z

Makes an embedded image a bit smaller. Signed-off-by: Joe Perches Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

The scheduled 'time' option removal

2008-02-08T17:22:36Z

The scheduled removal of the 'time' option. Signed-off-by: Adrian Bunk Acked-by: Randy Dunlap Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

Nuke duplicate include from printk.c

2008-02-08T17:22:34Z

Remove the duplicate inclusion of linux/jiffies.h from kernel/printk.c Signed-off-by: Jesper Juhl Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

printk.c: use unsigned ints instead of longs for logbuf index

2008-02-06T18:41:04Z

Stop using unsigned _longs_ for printk buffer indexes. Log buffer is way smaller than 2 gigabytes and unsigned ints will work too . Indeed, they do work nicely on all 32-bit platforms where longs and ints are the same. With this patch, we have following size savings on amd64: text data bss dec hex filename 5997 313 17736 24046 5dee 2.6.23.1.t64/kernel/printk.o 5858 313 17700 23871 5d3f 2.6.23.1.printk.t64/kernel/printk.o Signed-off-by: Denys Vlasenko Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

debug: turn ignore_loglevel into an early param

2008-01-31T21:45:23Z

i was debugging early crashes and wondered where all the printks went. The reason: ignore_loglevel_setup() was not called yet ... Signed-off-by: Ingo Molnar

x86: make early printk selectable on 64-bit as well

2008-01-30T12:33:06Z

Enable CONFIG_EMBEDDED to select CONFIG_EARLY_PRINTK on 64-bit as well. saves ~2K: text data bss dec hex filename 7290283 3672091 1907848 12870222 c4624e vmlinux.before 7288373 3671795 1907848 12868016 c459b0 vmlinux.after Signed-off-by: Ingo Molnar Signed-off-by: Thomas Gleixner

printk: revert ktime_get() timestamps

2008-01-27T07:03:54Z

revert 19ef9309273d26cb005cb23e6a370353dca91099. Kevin Winchester reported a lockup during X startup an bisected it to this commit. Reported-by: Kevin Winchester Signed-off-by: Ingo Molnar