1
linux/arch
Maciej W. Rozycki 36de48de85 [MIPS] DECstation: Optimised early printk()
This is an optimised implementation of early printk() for the DECstation.  
After the recent conversion to a MIPS-specific generic routine using a 
character-by-character output the performance dropped significantly.  
This change reverts to the previous speed -- even at 9600 bps of the 
serial console the difference is visible with a naked eye; I presume for a 
framebuffer it is even worse (it may depend on exactly which one is used 
though).

 Additionally the change includes a fix for a problem that the old 
implementation had -- the format used would not actually limit the length 
of the string output.  This new implementation uses a local buffer to deal 
with it -- even with this additional copying it is much faster than the 
generic function.

 Plus this driver is registered much earlier than the generic one, 
allowing one to see critical messages, such as one about an incorrect CPU 
setting used, that are produced beforehand. :-)

Signed-off-by: Maciej W. Rozycki <macro@linux-mips.org>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2007-07-10 17:33:00 +01:00
..
alpha alpha: fix alignment problem in csum_ipv6_magic() 2007-06-24 08:59:11 -07:00
arm [ARM] always allow dump_stack() to produce a backtrace 2007-07-05 19:59:51 +01:00
arm26
avr32 [AVR32] Update defconfigs 2007-06-23 15:43:48 +02:00
blackfin Blackfin arch: update board defconfig files 2007-07-02 13:49:15 +08:00
cris
frv
h8300 h8300 trival patches 2007-06-01 08:18:29 -07:00
i386 sched: x86, track TSC-unstable events 2007-07-09 18:51:59 +02:00
ia64 sched: zap the migration init / cache-hot balancing code 2007-07-09 18:51:57 +02:00
m32r
m68k x86_64: Quieten Atari keyboard warnings in Kconfig 2007-06-20 14:27:26 -07:00
m68knommu m68knommu: fix ColdFire timer off by 1 2007-06-08 17:23:32 -07:00
mips [MIPS] DECstation: Optimised early printk() 2007-07-10 17:33:00 +01:00
parisc [PARISC] unwinder improvements 2007-06-21 17:46:22 -04:00
powerpc [POWERPC] Update defconfigs 2007-07-02 00:04:36 -05:00
ppc potential parse error in ifdef part 3 2007-06-08 17:23:33 -07:00
s390 [S390] Add oops_enter()/oops_exit() calls to die(). 2007-06-19 13:10:20 +02:00
sh sh: Handle -ERESTART_RESTARTBLOCK for restartable syscalls. 2007-06-19 12:33:21 +09:00
sh64 sh64: Handle -ERESTART_RESTARTBLOCK for restartable syscalls. 2007-06-19 12:41:32 +09:00
sparc sched: zap the migration init / cache-hot balancing code 2007-07-09 18:51:57 +02:00
sparc64 sched: zap the migration init / cache-hot balancing code 2007-07-09 18:51:57 +02:00
um uml: remove PAGE_SIZE from libc code 2007-06-16 13:16:16 -07:00
v850
x86_64 x86_64 irq: use mask/unmask and proper locking in fixup_irqs() 2007-06-26 16:54:29 -07:00
xtensa [XTENSA] Remove non-rt signal handling 2007-05-31 17:49:32 -07:00