linux-toradex.git/drivers/char/serial167.c, branch v2.6.19.2

[PATCH] serial167 __user annotations, NULL noise removal

2006-10-15T18:00:58+00:00

Signed-off-by: Al Viro 
Signed-off-by: Linus Torvalds

[PATCH] m68k/MVME167: SERIAL167 tty flip buffer updates

2006-10-09T21:54:46+00:00

Compile fixes related to changed tty flip buffer handling.

Signed-off-by: Kars de Jong 
Signed-off-by: Geert Uytterhoeven 
Signed-off-by: Linus Torvalds

[PATCH] m68k/MVME167: SERIAL167 is no longer broken

2006-10-09T21:54:46+00:00

- SERIAL167 is no longer broken
- Removed some unused variables from the driver to fix compiler warnings

Signed-off-by: Kars de Jong 
Signed-off-by: Geert Uytterhoeven 
Signed-off-by: Linus Torvalds

IRQ: Maintain regs pointer globally rather than passing to IRQ handlers

2006-10-05T14:10:12+00:00

Maintain a per-CPU global "struct pt_regs *" variable which can be used instead
of passing regs around manually through all ~1800 interrupt handlers in the
Linux kernel.

The regs pointer is used in few places, but it potentially costs both stack
space and code to pass it around.  On the FRV arch, removing the regs parameter
from all the genirq function results in a 20% speed up of the IRQ exit path
(ie: from leaving timer_interrupt() to leaving do_IRQ()).

Where appropriate, an arch may override the generic storage facility and do
something different with the variable.  On FRV, for instance, the address is
maintained in GR28 at all times inside the kernel as part of general exception
handling.

Having looked over the code, it appears that the parameter may be handed down
through up to twenty or so layers of functions.  Consider a USB character
device attached to a USB hub, attached to a USB controller that posts its
interrupts through a cascaded auxiliary interrupt controller.  A character
device driver may want to pass regs to the sysrq handler through the input
layer which adds another few layers of parameter passing.

I've build this code with allyesconfig for x86_64 and i386.  I've runtested the
main part of the code on FRV and i386, though I can't test most of the drivers.
I've also done partial conversion for powerpc and MIPS - these at least compile
with minimal configurations.

This will affect all archs.  Mostly the changes should be relatively easy.
Take do_IRQ(), store the regs pointer at the beginning, saving the old one:

	struct pt_regs *old_regs = set_irq_regs(regs);

And put the old one back at the end:

	set_irq_regs(old_regs);

Don't pass regs through to generic_handle_irq() or __do_IRQ().

In timer_interrupt(), this sort of change will be necessary:

	-	update_process_times(user_mode(regs));
	-	profile_tick(CPU_PROFILING, regs);
	+	update_process_times(user_mode(get_irq_regs()));
	+	profile_tick(CPU_PROFILING);

I'd like to move update_process_times()'s use of get_irq_regs() into itself,
except that i386, alone of the archs, uses something other than user_mode().

Some notes on the interrupt handling in the drivers:

 (*) input_dev() is now gone entirely.  The regs pointer is no longer stored in
     the input_dev struct.

 (*) finish_unlinks() in drivers/usb/host/ohci-q.c needs checking.  It does
     something different depending on whether it's been supplied with a regs
     pointer or not.

 (*) Various IRQ handler function pointers have been moved to type
     irq_handler_t.

Signed-Off-By: David Howells 
(cherry picked from 1b16e7ac850969f38b375e511e3fa2f474a33867 commit)

[PATCH] Char: serial167, remove useless tty check

2006-10-04T14:55:13+00:00

serial167, remove useless tty check

tty is dereferenced before it is checked to be non-NULL.  Remove such
check.

Signed-off-by: Jiri Slaby 
Cc: Alan Cox 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

[PATCH] char: kill unneeded memsets

2006-10-04T14:55:13+00:00

char, another tmp_buf cleanup

No need to allocate one page as a side buffer.  It's no more used.  Clean this
(de)allocs of this useless memory pages in char subtree.

Signed-off-by: Jiri Slaby 
Acked-by: Alan Cox 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

[PATCH] const struct tty_operations

2006-10-02T14:57:14+00:00

As part of an SMP cleanliness pass over UML, I consted a bunch of
structures in order to not have to document their locking.  One of these
structures was a struct tty_operations.  In order to const it in UML
without introducing compiler complaints, the declaration of
tty_set_operations needs to be changed, and then all of its callers need to
be fixed.

This patch declares all struct tty_operations in the tree as const.  In all
cases, they are static and used only as input to tty_set_operations.  As an
extra check, I ran an i386 allyesconfig build which produced no extra
warnings.

53 drivers are affected.  I checked the history of a bunch of them, and in
most cases, there have been only a handful of maintenance changes in the
last six months.  serial_core.c was the busiest one that I looked at.

Signed-off-by: Jeff Dike 
Acked-by: Alan Cox 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

Remove obsolete #include

2006-06-30T17:25:36+00:00

Signed-off-by: Jörn Engel 
Signed-off-by: Adrian Bunk

[PATCH] devfs: Remove the tty_driver devfs_name field as it's no longer needed

2006-06-26T19:25:09+00:00

Also fixes all drivers that set this field.

Signed-off-by: Greg Kroah-Hartman

[PATCH] remove unused tmp_buf_sem's

2006-01-14T18:41:42+00:00

tmp_buf_sem sems to be a common name for something completely unused...

Signed-off-by: Adrian Bunk 
Acked-by: Greg Kroah-Hartman  ("usb portion")
Signed-off-by: Linus Torvalds