- 11 Feb, 2007 40 commits
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Eric W. Biederman authored
This does several things. - It moves looking up of the current foreground console into process context where we can safely take the semaphore that protects this operation. - It uses the new flavor of work queue processing. - This generates a factor of do_SAK, __do_SAK that runs immediately. - This calls __do_SAK with the console semaphore held ensuring nothing else happens to the console while we process the SAK operation. - With the console SAK processing moved into process context this patch removes the xchg operations that I used to attempt to attomically update struct pid, because of the strange locking used in the SAK processing. With SAK using the normal console semaphore nothing special is needed. Cc: Oleg Nesterov <oleg@tv-sign.ru> Signed-off-by:
Eric W. Biederman <ebiederm@xmission.com> Signed-off-by:
Andrew Morton <akpm@linux-foundation.org> Signed-off-by:
Linus Torvalds <torvalds@linux-foundation.org>
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Michael Neuling authored
Add retain_initrd option to control freeing of initrd memory after extraction. By default, free memory as previously. The first boot will need to hold a copy of the in memory fs for the second boot. This image can be large (much larger than the kernel), hence we can save time when the memory loader is slow. Also, it reduces the memory footprint while extracting the first boot since you don't need another copy of the fs. Signed-off-by:
Michael Neuling <mikey@neuling.org> Cc: "Randy.Dunlap" <rdunlap@xenotime.net> Signed-off-by:
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Miguel Ojeda Sandonis authored
Add support for auxiliary displays, the ks0108 LCD controller, the cfag12864b LCD and adds a framebuffer device: cfag12864bfb. - Add a "auxdisplay/" folder in "drivers/" for auxiliary display drivers. - Add support for the ks0108 LCD Controller as a device driver. (uses parport interface) - Add support for the cfag12864b LCD as a device driver. (uses ks0108 LCD Controller driver) - Add a framebuffer device called cfag12864bfb. (uses cfag12864b LCD driver) - Add the usual Documentation, includes, Makefiles, Kconfigs, MAINTAINERS, CREDITS... - Miguel Ojeda will maintain all the stuff above. [rdunlap@xenotime.net: workqueue fixups] [akpm@osdl.org: kconfig fix] Signed-off-by:
Miguel Ojeda Sandonis <maxextreme@gmail.com> Cc: Greg KH <greg@kroah.com> Acked-by:
Paulo Marques <pmarques@grupopie.com> Cc: "Randy.Dunlap" <rdunlap@xenotime.net> Signed-off-by:
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Ahmed S. Darwish authored
Use ARRAY_SIZE macro already defined in linux/kernel.h Signed-off-by:
Ahmed S. Darwish <darwish.07@gmail.com> Cc: Miles Bader <uclinux-v850@lsi.nec.co.jp> Signed-off-by:
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Jeff Dike authored
This patch fixes some missing ptrace bits on x86_64. PTRACE_ARCH_PRCTL is hooked up and implemented. This required generalizing arch_prctl_skas slightly to take a task_struct to modify. Previously, it always operated on current. Reading and writing the debug registers is also enabled by un-ifdefing the code that implements that. It turns out that x86_64 is identical to i386, so the same code can be used. Signed-off-by:
Jeff Dike <jdike@addtoit.com> Cc: Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it> Signed-off-by:
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Jeff Dike authored
x86_64 needs some TLS fixes. What was missing was remembering the child thread id during clone and stuffing it into the child during each context switch. The %fs value is stored separately in the thread structure since the host controls what effect it has on the actual register file. The host also needs to store it in its own thread struct, so we need the value kept outside the register file. arch_prctl_skas was fixed to call PTRACE_ARCH_PRCTL appropriately. There is some saving and restoring of registers in the ARCH_SET_* cases so that the correct set of registers are changed on the host and restored to the process when it runs again. Signed-off-by:
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Jeff Dike authored
The startup code panics a lot if anything goes wrong early on. This is wrong for several reasons, like the kernel isn't running, so you can't really be calling into it yet, but the harm comes from useful error messages being trapped in the printk ring where no one will ever see them. This patch changes these panics to perror and printf in wrappers which also exit. Normal, informational, prints are also wrapped so that fflush(stdout) is called after each one. This is so the output appears in the correct sequence in the event of an error. Signed-off-by:
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Jeff Dike authored
Comment the lack of locking of data that's set up once at boot time. Also fixed a couple of bogus printks. Signed-off-by:
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Jeff Dike authored
Formatting fixes in the register handling code. Signed-off-by:
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Jeff Dike authored
Comment the lack of locking of the elf data extracted from the ELF headers passed to UML. Signed-off-by:
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Jeff Dike authored
Add an error message when two umids are put on the command line. umid.h is kind of pointless since it only declares one thing, and that is already declared in os.h. Commented the lack of locking of some data in os-Linux/umid.h. Signed-off-by:
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Jeff Dike authored
Fix formatting in the sigio code. Signed-off-by:
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Jeff Dike authored
Comment the use of a mysterious-looking lock. Signed-off-by:
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Jeff Dike authored
Tidying the irq code - make a variable static activate_fd can call kmalloc directly since it's now kernel code added a no-locking comment fixed a style violation Signed-off-by:
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Robert P. J. Day authored
Fix apparent typo, where CONFIG_64_BIT should read CONFIG_64BIT. Signed-off-by:
Robert P. J. Day <rpjday@mindspring.com> Cc: Jeff Dike <jdike@addtoit.com> Signed-off-by:
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Jeff Dike authored
Fix a bunch of style violations in mem.c. Signed-off-by:
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Jeff Dike authored
We shouldn't be using the os wrappers from os code - we can use libc directly. This patch replaces wrapper calls with libc calls. It turns out that os_sigio_async had only one caller, which was in startup.c, so that function is moved there and its name changed. Signed-off-by:
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Jeff Dike authored
Some style fixes in startup.c. Signed-off-by:
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Jeff Dike authored
Add a couple of comments about some non-locked data. Signed-off-by:
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Jeff Dike authored
Locking comments and emacs comment removal in the low-level memory and temp file code. Signed-off-by:
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Jeff Dike authored
Some small locking and formatting fixes in the ubd driver. Signed-off-by:
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Jeff Dike authored
Replace global queue and lock with per-device queues and locks. Mostly a straightforward replacement of ubd_io_lock with dev->lock and ubd_queue with dev->queue. Complications - There was no way to get a request struct (and queue) from the structure sent to the io_thread, so a pointer to the request was added. This is needed in ubd_handler in order to kick do_ubd_request to process another request. Queue initialization is moved from ubd_init to ubd_add. Signed-off-by:
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Jeff Dike authored
CONFIG_HOST_TASK_SIZE doesn't exist any more. Signed-off-by:
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Jeff Dike authored
kstack_depth_to_print can be made const. Signed-off-by:
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Jeff Dike authored
A bunch of the signal handlers can be made static. Signed-off-by:
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Jeff Dike authored
syscall_index and next_syscall_index turn out not to be used. Signed-off-by:
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Jeff Dike authored
It turns out that resource.c isn't needed. Signed-off-by:
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Jeff Dike authored
prev_nsecs and delta need to be arrays, and indexed by CPU number. Signed-off-by:
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Jeff Dike authored
We need to initialize lists properly. Signed-off-by:
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Jeff Dike authored
Fix a bunch of style violations in mem.c and physmem.c Signed-off-by:
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Jeff Dike authored
Comment some lack of locking in the iomem driver. Also, a couple of variables are in the wrong place, so they are moved. Signed-off-by:
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Jeff Dike authored
Eliminate the open_mutex after complaints from Blaisorblade. It turns out that the tty count provides the information needed to tell whether we are the first opener or last closer. Signed-off-by:
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Jeff Dike authored
Remove the last vestiges of devfs from console registration. Change the name of the function, plus remove a couple of unused fields from the line_driver structure. struct lines is no longer needed, all traces of it are gone. The only way that I can see to mark a structure as being almost-const is to individually const the fields. This is the case for the line_driver structure, which has only one modifiable field - a list_head in a sub-structure. Signed-off-by:
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Jeff Dike authored
Whitespace fixes and emacs comment removal. Signed-off-by:
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Jeff Dike authored
The chan_opts structure is mostly const, and needs no locking. Comment the lack of locking on the one field that can change. Make all the other fields const. It turned out that console_open_chan didn't use its chan_opts argument, so that is deleted from the function and its callers. Signed-off-by:
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Jeff Dike authored
Comment the lack of locking. Signed-off-by:
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Jeff Dike authored
A couple of list_head declarations can be improved through the use of LIST_HEAD(). Signed-off-by:
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Jeff Dike authored
Add some missing locking to walks of the transports and opened lists. Delete some dead code. Comment the lack of some locking. Signed-off-by:
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Jeff Dike authored
Kill a compilation warning. Signed-off-by:
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Jeff Dike authored
Whitespace and style fixes. Signed-off-by:
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