- Jan 09, 2006
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David Woodhouse authored
This cleanup patch speeds up the null syscall path on ppc64 by about 3%, and brings the ppc32 and ppc64 code slightly closer together. The ppc64 code was checking current_thread_info()->flags twice in the syscall exit path; once for TIF_SYSCALL_T_OR_A before disabling interrupts, and then again for TIF_SIGPENDING|TIF_NEED_RESCHED etc after disabling interrupts. Now we do the same as ppc32 -- check the flags only once in the fast path, and re-enable interrupts if necessary in the ptrace case. The patch abolishes the 'syscall_noerror' member of struct thread_info and replaces it with a TIF_NOERROR bit in the flags, which is handled in the slow path. This shortens the syscall entry code, which no longer needs to clear syscall_noerror. The patch adds a TIF_SAVE_NVGPRS flag which causes the syscall exit slow path to save the non-volatile GPRs into a signal frame. This removes the need for the assembly wrappers around sys_sigsuspend(), sys_rt_sigsuspend(), et al which existed solely to save those registers in advance. It also means I don't have to add new wrappers for ppoll() and pselect(), which is what I was supposed to be doing when I got distracted into this... Finally, it unifies the ppc64 and ppc32 methods of handling syscall exit directly into a signal handler (as required by sigsuspend et al) by introducing a TIF_RESTOREALL flag which causes _all_ the registers to be reloaded from the pt_regs by taking the ret_from_exception path, instead of the normal syscall exit path which stomps on the callee-saved GPRs. It appears to pass an LTP test run on ppc64, and passes basic testing on ppc32 too. Brief tests of ptrace functionality with strace and gdb also appear OK. I wouldn't send it to Linus for 2.6.15 just yet though :) Signed-off-by:
David Woodhouse <dwmw2@infradead.org> Signed-off-by:
Paul Mackerras <paulus@samba.org>
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Kumar Gala authored
Moved 83xx and QUICC Engine interrupt handling code into arch/powerpc as a precursor of getting 83xx sub-arch building in arch/powerpc. Signed-off-by:
Kumar Gala <galak@kernel.crashing.org> Signed-off-by:
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Michael Ellerman authored
This patch merges, to some extent, the PPC32 and PPC64 kexec implementations. We adopt the PPC32 approach of having ppc_md callbacks for the kexec functions. The current PPC64 implementation becomes the "default" implementation for PPC64 which platforms can select if they need no special treatment. I've added these default callbacks to pseries/maple/cell/powermac, this means iSeries no longer supports kexec - but it never worked anyway. I've renamed PPC32's machine_kexec_simple to default_machine_kexec, inline with PPC64. Judging by the comments it might be better named machine_kexec_non_of, or something, but at the moment it's the only implementation for PPC32 so it's the "default". Kexec requires machine_shutdown(), which is in machine_kexec.c on PPC32, but we already have in setup-common.c on powerpc. All this does is call ppc_md.nvram_sync, which only powermac implements, so instead make machine_shutdown a ppc_md member and have it call core99_nvram_sync directly on powermac. I've also stuck relocate_kernel.S into misc_32.S for powerpc. Built for ARCH=ppc, and 32 & 64 bit ARCH=powerpc, with KEXEC=y/n. Booted on P5 LPAR and successfully kexec'ed. Should apply on top of 493f25ef. Signed-off-by:
Michael Ellerman <michael@ellerman.id.au> Signed-off-by:
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Adrian Bunk authored
This patch removes the EXPORT_SYMBOL'ed but completely unused variable ucSystemType and removes the unneeded EXPORT_SYMBOL(_prep_type). Signed-off-by:
Adrian Bunk <bunk@stusta.de> Acked-by:
Tom Rini <trini@kernel.crashing.org> Signed-off-by:
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- Jan 07, 2006
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Russell King authored
This is needs to be visible to other architectures using the AMBA bus and peripherals. Signed-off-by:Russell King <rmk+kernel@arm.linux.org.uk>
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Russell King authored
Make the AMBA bus code visible to other architectures. Signed-off-by: -
Russell King authored
Since the ARM AMBA bus is used on MIPS as well as ARM, we need to make the bus available for other architectures to use. Move the AMBA include files from include/asm-arm/hardware/ to include/linux/amba/ Signed-off-by: -
Richard Purdie authored
Patch from Richard Purdie Fix a gcc4 build error (incomplete element type) in the pxa SharpSL PM code. Signed-off-by:
Richard Purdie <rpurdie@rpsys.net> Signed-off-by:
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- Jan 06, 2006
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Brian Gerst authored
Many arches make shared objects for VDSOs. Generally exclude them. Signed-off-by:
Brian Gerst <bgerst@didntduck.org> Signed-off-by:
Sam Ravnborg <sam@ravnborg.org>
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Linus Torvalds authored
This was harmless, but for the case of a device that had no irq pre-defined we would incorrectly suggest that "usepirqmask" might make a difference. It never would, and the message was just confusing people. Reported in the dmesg of Etienne Lorrain. Signed-off-by:Linus Torvalds <torvalds@osdl.org>
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Martin Schwidefsky authored
Sanitize some s390 Kconfig options. We have ARCH_S390, ARCH_S390X, ARCH_S390_31, 64BIT, S390_SUPPORT and COMPAT. Replace these 6 options by S390, 64BIT and COMPAT. Signed-off-by:
Martin Schwidefsky <schwidefsky@de.ibm.com> Signed-off-by:
Andrew Morton <akpm@osdl.org> Signed-off-by:
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Frank Pavlic authored
New feature V=V qdio pass-through. QDIO and HiperSockets processing in z/VM V=V guest environments (as well as V=R with z/VM running in LPAR mode) requires shadowing of all QDIO architecture queue elements. Especially the shadowing of SBALs and SLSBs structures in the hypervisor, and the need to issue SIGA SYNC operations to observe state changes, eventually causes significant CPU processing overhead in the hypervisor. The QDIO pass-through support for V=V guests avoids the shadowing of SBALs and SLSBs. This significantly reduces the hypervisor overhead for QDIO based I/O. Signed-off-by:
Frank Pavlic <pavlic@de.ibm.com> Signed-off-by:
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Jan Glauber authored
Add support for the hardware accelerated AES crypto algorithm. Signed-off-by:
Jan Glauber <jan.glauber@de.ibm.com> Signed-off-by:
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Jan Glauber authored
Add support for the hardware accelerated sha256 crypto algorithm. Signed-off-by:
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Jan Glauber authored
Replace all references to z990 by s390 in the in-kernel crypto files in arch/s390/crypto. The code is not specific to a particular machine (z990) but to the s390 platform. Big diff, does nothing.. Signed-off-by:
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Andreas Krebbel authored
Signed-off-by:
Andreas Krebbel <krebbel1@de.ibm.com> Signed-off-by:
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Martin Schwidefsky authored
There are some more places where the use of cputime_t instead of an integer type and the associated macros is necessary for the virtual cputime accounting on s390. Affected are the s390 specific appldata code and BSD process accounting. Signed-off-by:
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Martin Schwidefsky authored
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Cedric Le Goater authored
Check return code of do_sigaltstack and force a SIGSEGV if it is -EFAULT. Signed-off-by:
Cedric Le Goater <clg@fr.ibm.com> Signed-off-by:
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Martin Schwidefsky authored
Convert __access_ok to an inline C function and change __get_user primitive to avoid uaccess compiler warnings. Signed-off-by:
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Martin Schwidefsky authored
Hugh Dickins <hugh@veritas.com> Fix the broken atomic_cmpxchg primitive. Add atomic_sub_and_test, atomic64_sub_return, atomic64_sub_and_test, atomic64_cmpxchg, atomic64_add_unless and atomic64_inc_not_zero. Replace old style atomic_compare_and_swap by atomic_cmpxchg. Shorten the whole header by defining most primitives with the two inline functions atomic_add_return and atomic_sub_return. In addition this patch contains the s390 related fixes of Hugh's "mm: fill arch atomic64 gaps" patch. Signed-off-by:Hugh Dickins <hugh@veritas.com> Signed-off-by:
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Jeff Dike authored
Free the network IRQ when closing down the network devices at shutdown. Delete the device from the opened devices list on close. These prevent an -EBADF when later disabling SIGIO on all extant descriptors and a complaint from free_irq about freeing the IRQ twice. 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
Fix up some bogus spacing in the mconsole driver. Also delete the emacs formatting comment at the end. Signed-off-by:
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Jeff Dike authored
Pass sysrq output back to the mconsole client using the mechanism introduced for stack output. Signed-off-by:
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Jeff Dike authored
The stack command now sends the printk output back to the mconsole client. This is done by registering a special console for the mconsole driver. This receives all printk output. Normally, it is ignored, but when a stack command is issued, any printk output will be sent back to the client. This will capture any printk output, whether it is stack output or not, since we can't tell the difference. Signed-off-by:
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Jeff Dike authored
This is needed for the console output patch, since we have a possibly non-NULL-terminated string there. So, the new interface takes a string and a length, and the old interface calls strlen on its string and calls the new interface with the length. There's also a bit of whitespace cleanup. Signed-off-by:
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Jeff Dike authored
Produce a compile-time error if both MODE_SKAS and MODE_TT are disabled. Signed-off-by:
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Jeff Dike authored
Code cleanup - unregister_winch and winch_cleanup had some duplicate code. This is now abstracted out into free_winch. Signed-off-by:
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Jeff Dike authored
This patch cleans up the umid code: - The only_if_set argument to get_umid is gone. - get_umid returns an empty string rather than NULL if there is no umid. - umid_is_random is gone since its users went away. - Some printfs were turned into printks because the code runs late enough that printk is working. - Error paths were cleaned up. - Some functions now return an error and let the caller print the error message rather than printing it themselves. This eliminates the practice of passing a pointer to printf or printk in, depending on where in the boot process we are. - Major tidying of not_dead_yet - mostly error path cleanup, plus a comment explaining why it doesn't react to errors the way you might expect. - Calls to os_* interfaces that were moved under os are changed back to their native libc forms. - snprintf, strlcpy, and their bounds-checking friends are used more often, replacing by-hand bounds checking in some places. Signed-off-by:
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Jeff Dike authored
I reworked Gennady's umid OS abstraction patch because the code shouldn't be moved entirely to os. As it turns out, I moved most of it anyway. This patch is the minimal one needed to move the code and have it work. It turns out that the concept of the umid is OS-independent, but almost everything else about the implementation is OS-dependent. This is code movement without cleanup - a follow-on patch tidies everything up without shuffling code around. Signed-off-by:
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Jeff Dike authored
This patch adds support for throttling and unthrottling input when the tty driver can't handle it. Signed-off-by:
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Jeff Dike authored
When the tty flip_buf is full, it's a good idea to delay the input processing for a jiffy, rather than just scheduling the tasklet immediately. Signed-off-by:
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Jeff Dike authored
This patch simplifies the opening and closing of host console devices and the registration and deregistration of IRQs. The intent is to make it obvious that an IRQ can't exist without an open file descriptor. chan_enable will now open the channel, and when both opening and IRQ registration are desired, this should be used. Opening only is done for the initial console, so that interface still needs to exist. The free_irqs_later interface is now gone. It was intended to avoid freeing an IRQ while it was being processed. It did this, but it didn't eliminate the possiblity of free_irq being called from an interrupt, which is bad. In its place is a list of irqs to be freed, which is processed by the signal handler just before exiting. close_one_chan now disables irqs. When a host device disappears, it is just closed, and that disables IRQs. The device id registered with the IRQ is now the chan structure, not the tty. This is because the interrupt arrives on a descriptor associated with the channel. This caused equivalent changes in the arguments to line_timer_cb. line_disable is gone since it is not used any more. The count field in the line structure is gone. tty->count is used instead. The complicated logic in sigio_handler with freeing IRQs when necessary and making sure its idea of the next irq is correct is now much simpler. The irq list can't be rearranged underneath it, so it is now a simple list walk. Signed-off-by:
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Jeff Dike authored
This patch changes when console devices are configured in order to prepare the ground for the next patch. parse_chan_pair is now done earlier, when initcalls are run, rather than when the device is opened. When a host device disappears, the channel list is closed, but not freed. This is required by the previous change. line_config now takes the options structure as an argument, and line_open doesn't. Signed-off-by:
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Jeff Dike authored
line_setup is changed to return the device which it set up, rather than just success or failure. This will be important in the line-config patch. Signed-off-by:
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Jeff Dike authored
Some structure fields were being dynamically initialized when they could be initialized at compile-time instead. This also makes some declarations static (in the C sense). Signed-off-by:
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Jeff Dike authored
A bit of restructuring which eliminates the all_allowed argument (which is mconsole-specific) to line_setup. That logic is moved to the mconsole callback. Signed-off-by:
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Jeff Dike authored
This removes a structure field which turned out to be pointless, and references to it. Signed-off-by:
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Jeff Dike authored
This patch replaces instances of "sizeof(foo)/sizeof(foo[0])" with ARRAY_SIZE(foo), which expands to the same thing. Signed-off-by:
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Jeff Dike authored
This patch makes a bunch of non-functional changes - return(foo); becomes return foo; some statements are broken across lines for readability some trailing whitespace is cleaned up open_one_chan took four arguments, three of which could be deduced from the first. Accordingly, they were eliminated. some examples of "} else {" had a newline added some whitespace cleanup in the indentation lines_init got some control flow cleanup some long lines were broken removed another emacs-specific C formatting comment Signed-off-by:
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