kernel/linux.git/drivers/char/rtc.c, branch linux-2.6.22.y

drivers/char: use __set_current_state()

2007-05-08T18:15:13+00:00

use __set_current_state(TASK_*) instead of current->state = TASK_*, Signed-off-by: Milind Arun Choudhary Cc: Jiri Slaby Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

[PATCH] sysctl: remove insert_at_head from register_sysctl

2007-02-14T16:09:59+00:00

The semantic effect of insert_at_head is that it would allow new registered sysctl entries to override existing sysctl entries of the same name. Which is pain for caching and the proc interface never implemented. I have done an audit and discovered that none of the current users of register_sysctl care as (excpet for directories) they do not register duplicate sysctl entries. So this patch simply removes the support for overriding existing entries in the sys_sysctl interface since no one uses it or cares and it makes future enhancments harder. Signed-off-by: Eric W. Biederman Acked-by: Ralf Baechle Acked-by: Martin Schwidefsky Cc: Russell King Cc: David Howells Cc: "Luck, Tony" Cc: Ralf Baechle Cc: Paul Mackerras Cc: Martin Schwidefsky Cc: Andi Kleen Cc: Jens Axboe Cc: Corey Minyard Cc: Neil Brown Cc: "John W. Linville" Cc: James Bottomley Cc: Jan Kara Cc: Trond Myklebust Cc: Mark Fasheh Cc: David Chinner Cc: "David S. Miller" Cc: Patrick McHardy Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

[PATCH] sysctl: remove sys_sysctl support from drivers/char/rtc.c

2007-02-14T16:09:57+00:00

The real time clock driver was using the binary number reserved for cdroms in the sysctl binary number interface, which is a no-no. So since the sysctl binary interface is wrong remove it. Signed-off-by: Eric W. Biederman Cc: Alessandro Zummo Acked-by: Ralf Baechle Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

[PATCH] Char: timers cleanup

2007-02-12T17:48:30+00:00

- Use timer macros to set function and data members and to modify expiration time. - Use DEFINE_TIMER for global timers and do not init them at run-time in these cases. - del_timer_sync is common in most cases -- we want to wait for timer function if it's still running. Signed-off-by: Jiri Slaby Cc: Dave Airlie Cc: David Woodhouse Cc: Dominik Brodowski Cc: Alessandro Zummo Cc: Paul Fulghum Cc: Kylene Jo Hall Cc: Wim Van Sebroeck Acked-by: Dmitry Torokhov (Input bits) Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

[PATCH] rtc warning fix

2006-12-22T16:55:47+00:00

drivers/char/rtc.c:116: warning: 'hpet_rtc_interrupt' defined but not used Cc: Jan Beulich Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

[PATCH] RTC driver init adjustment

2006-12-13T17:05:52+00:00

- conditionalizes procfs code upon CONFIG_PROC_FS (to reduce code size when that option is not enabled) - make initialization no longer fail when the procfs entry can't be allocated (namely would initialization always have failed when CONFIG_PROC_FS was not set) - move the formerly file-scope static variable rtc_int_handler_ptr into the only function using it, and makes it automatic. Signed-off-by: Jan Beulich Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

[PATCH] rtc: fx error case

2006-12-13T17:05:52+00:00

Ensure RTC driver doesn't use its timer when it doesn't get to set it up (as it cannot currently prevent other of its functions to be called from outside when not built as a module - probably this should also be addressed). Signed-off-by: Jan Beulich Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

[RTC] Consistently use of tabs for formatting.

2006-10-09T22:20:47+00:00

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] remove unnecessary barrier in rtc_get_rtc_time

2006-09-29T16:18:05+00:00

Signed-off-by: Steven Rostedt Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds