- Mar 26, 2007
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David Wilder authored
Running a probe on s390 with a probe address that is not 4 byte aligned results in a Kernel BUG. The problem is that the stura instruction used by swap_instruction requires the destination address to be 4 byte aligned. As stura only writes 4 bytes, aligning to the next 4 byte aligned address results in the breakpoint instruction being stored past the probe address. The fix is to align the address backward (to the previous 4 byte aligned address) and writing the two byte breakpoint instruction in the appropriate bytes. Cc: Martin Schwidefsky <schwidefsky@de.ibm.com> Signed-off-by:
David Wilder <dwilder@us.ibm.com> Signed-off-by:
Heiko Carstens <heiko.carstens@de.ibm.com>
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- Mar 19, 2007
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Heiko Carstens authored
Signed-off-by:
Martin Schwidefsky <schwidefsky@de.ibm.com>
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Michael Holzheu authored
We used wrong length values for ipl and dump hardware structures. Since z/VM checks the ipl parameters more accurately than LPAR, the operations fail there. Signed-off-by:
Michael Holzheu <holzheu@de.ibm.com> Signed-off-by:
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Heiko Carstens authored
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Jean Delvare authored
strlcpy already accounts for the trailing zero in its length computation, so there is no need to substract one to the buffer size. Signed-off-by:
Jean Delvare <khali@linux-fr.org> Signed-off-by:
Andrew Morton <akpm@linux-foundation.org> Signed-off-by:
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Heiko Carstens authored
diag 260 returns the address of the last addressable byte and not the size of memory. Since we want the size we have to add 1 to the return value. Disable diag 260 for non z/Arch mode since it doesn't work there anyway. Signed-off-by:
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- Mar 14, 2007
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Al Viro authored
PGALLOC_DMA is defined only if we have CONFIG_ZONE_DMA Signed-off-by:
Al Viro <viro@zeniv.linux.org.uk> Signed-off-by:
Linus Torvalds <torvalds@linux-foundation.org>
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- Mar 05, 2007
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Gerald Schaefer authored
Replaced check_user_space() + __check_access_register with the new check_space(). The old functions made wrong assumptions about kernel and user space when the kernel and user address spaces are switched (kernel in home space, user in primary/secondary space). Secondly the user process can switch to the accress register mode if it is running in primary or secondary mode. In addition it can load an arbitrary value to the access registers. If any other value than 0 for primary space or 1 for secondary space is loaded and memory is accessed using the base register related to the access register, the program should be terminated with a SIGSEGV. To achieve that the DUALD pointer in the DUCT and the PSALD pointer in the PASTE need to point to an array of 8 invalid access-list entries to get a ALEN-translation exception if an invalid alet is used. Signed-off-by:
Gerald Schaefer <geraldsc@de.ibm.com> Signed-off-by:
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Heiko Carstens authored
nss and kexec don't work together since kexec wants to write to the read-only text section of the shared kernel image. Signed-off-by:
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Heiko Carstens authored
Reipl doesn't work on older machines were s390_reset_machine() gets called. The reason is that the text section is read-only but the variable dump_prefix_page is there. Since s390_reset_machine() writes to it we get a protection exception. Therefore move dump_prefix_page to the bss section. Signed-off-by:
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Heiko Carstens authored
Avoid sprinkling a _lot_ of preempt_disable/preempt_enable pairs. This would be necessary for e.g. the iucv driver. Also this way we are more consistent with other architectures which disable preemption at least for smp_call_function. Signed-off-by:
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Martin Schwidefsky authored
The illegal operation handler calls the die notifier with DIE_BPT to let kprobes pick up its breakpoint. If kprobes does not find its breakpoint it returns NOTIFY_STOP instead of NOTIFY_DONE. Since we use stop_machine_run on s390 to arm/disarm the kprobes breakpoints the race that kprobe_handler tries to solve by checking for the kprobes breakpoints does not exist. Removing the check makes BUG_ON working again. Signed-off-by:
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- Feb 21, 2007
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Michael Holzheu authored
Since $(ARCH) is always "s390" we can replace it with "s390". Signed-off-by:
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Heiko Carstens authored
With CONFIG_SHARED_KERNEL the kernel text segment that might be in a read only memory sections starts at 1MB. Memory between 0x12000 and 0x100000 is unused then. Free this, so we have appr. an extra MB of memory available. Signed-off-by:
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Heiko Carstens authored
Clear only memory from __bss_start to __bss_stop when clearing the bss section. Not until _end, which currently happens to be the same. Signed-off-by:
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Michael Holzheu authored
To avoid ugly warings for older gccs, we replace BUG() with "return NULL", which is just as well. Signed-off-by:
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Michael Holzheu authored
Setup.h has been misused for ipl related stuff in the past. We now move everything, which has to do with ipl and reipl to a new header file named "ipl.h". Signed-off-by:
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Michael Holzheu authored
Replace two stidp inline assemblies with one global implementation. Signed-off-by:
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Heiko Carstens authored
Force reading of *in_sync in while loop. Loops where the content that is checked for is changed by a different cpu always should have some sort of barrier() semantics. Otherwise this might lead to very subtle bugs. Signed-off-by:
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Heiko Carstens authored
Disable ZONE_DMA on 31-bit. All memory is addressable by all devices and we do not need any special memory pool. Signed-off-by:
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Jan Glauber authored
Introduce __smp_call_function_map which calls a function on all cpus given with a cpumask_t. Use it to implement smp_call_function and smp_call_function_on. Replace smp_ext_bitcall_others with smp_ext_bitcall and a for_each_cpu_mask loop. Use a cpumask_t instead of an atomic_t for cpu counting and print a warning if preempt is on in __smp_call_function_map(). Signed-off-by:
Jan Glauber <jan.glauber@de.ibm.com> Signed-off-by:
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Martin Schwidefsky authored
The new delay implementation uses the clock comparator and an external interrupt even if it is called disabled for interrupts. To do this all external interrupt source except clock comparator are switched of before enabling external interrupts. The external interrupt at the end of the delay period may not execute softirqs or we can end up in a dead-lock. Signed-off-by: -
Martin Schwidefsky authored
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- Feb 16, 2007
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Thomas Gleixner authored
Fixup the is_contionous replacement by a flag field. Signed-off-by:
Thomas Gleixner <tglx@linutronix.de> Signed-off-by:
Ingo Molnar <mingo@elte.hu> Cc: Martin Schwidefsky <schwidefsky@de.ibm.com> Cc: john stultz <johnstul@us.ibm.com> Cc: Roman Zippel <zippel@linux-m68k.org> Signed-off-by:
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- Feb 14, 2007
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Eric W. Biederman authored
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 <ebiederm@xmission.com> Acked-by:
Ralf Baechle <ralf@linux-mips.org> Acked-by:
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Eric W. Biederman authored
Signed-off-by:
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Eric W. Biederman authored
We need to have the the definition of all top level sysctl directories registers in sysctl.h so we don't conflict by accident and cause abi problems. Signed-off-by:
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- Feb 12, 2007
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Arjan van de Ven authored
Many struct file_operations in the kernel can be "const". Marking them const moves these to the .rodata section, which avoids false sharing with potential dirty data. In addition it'll catch accidental writes at compile time to these shared resources. [akpm@osdl.org: sparc64 fix] Signed-off-by:
Arjan van de Ven <arjan@linux.intel.com> Signed-off-by:
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Alon Bar-Lev authored
Rename saved_command_line into boot_command_line. Signed-off-by:
Alon Bar-Lev <alon.barlev@gmail.com> Cc: Heiko Carstens <heiko.carstens@de.ibm.com> Cc: Martin Schwidefsky <schwidefsky@de.ibm.com> Signed-off-by:
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Heiko Carstens authored
smp_call_function and smp_call_function_on share the same lock and smp_call_function_on disables softirq's so it can be called from softirq context as well. Hence smp_call_function muss disable softirqs as well to avoid deadlocks. Signed-off-by:
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- Feb 11, 2007
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Al Viro authored
Martin Schwidefsky wrote: "s390 does not even need (in|out)b(_p|). I wondered what else from io.h do we not need. The answer is: almost nothing. With the devres patch from Al and the dma-mapping patch from Heiko we can get rid of iomem and all associated definitions." So we'll just need to replace NO_IOPORT with NO_IOMEM in Kconfig and kill arch/s390/mm/ioremap.c. BTW, there's an annoying bit of junk in there - IO_SPACE_LIMIT. We only need it for /proc/ioports, which AFAICS shouldn't even be there on s390 (or uml). OTOH, removing that thing would mean a user-visible change - we go from "empty file in /proc" to "no such file in /proc"... Signed-off-by:
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Al Viro authored
* Split the implementation-agnostic stuff in separate files. * Make sure that targets using non-default request_irq() pull kernel/irq/devres.o * Introduce new symbols (HAS_IOPORT and HAS_IOMEM) defaulting to positive; allow architectures to turn them off (we needed these symbols anyway for dependencies of quite a few drivers). * protect the ioport-related parts of lib/devres.o with CONFIG_HAS_IOPORT. Signed-off-by:
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Kirill Korotaev authored
Part of long forgotten patch http://groups.google.com/group/fa.linux.kernel/msg/e98e941ce1cf29f6?dmode=source Since then, m32r grabbed two copies. Leave s390 copy because of important absence of CONFIG_VT, but remove references to non-existent timerlist_lock. ia64 also loses timerlist_lock. Signed-off-by:
Alexey Dobriyan <adobriyan@openvz.org> Acked-by:
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Kyle McMartin authored
I noticed that almost all architectures implemented exactly the same sys32_sysinfo... except parisc, where a bug was to be found in handling of the uptime. So let's remove a whole whack of code for fun and profit. Cribbed compat_sys_sysinfo from x86_64's implementation, since I figured it would be the best tested. This patch incorporates Arnd's suggestion of not using set_fs/get_fs, but instead extracting out the common code from sys_sysinfo. Cc: Christoph Hellwig <hch@infradead.org> Cc: <linux-arch@vger.kernel.org> Signed-off-by:
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Jean-Paul Saman authored
Update all arch/*/kernel/vmlinux.lds.S to not include space for initramfs when CONFIG_BLK_DEV_INITRAMFS is not selected. This saves another 4 kbytes on most platfoms (some reserve PAGE_SIZE for initramfs). Signed-off-by:
Jean-Paul Saman <jean-paul.saman@nxp.com> Cc: Al Viro <viro@zeniv.linux.org.uk> Cc: <linux-arch@vger.kernel.org> Signed-off-by:
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Christoph Lameter authored
This patch simply defines CONFIG_ZONE_DMA for all arches. We later do special things with CONFIG_ZONE_DMA after the VM and an arch are prepared to work without ZONE_DMA. CONFIG_ZONE_DMA can be defined in two ways depending on how an architecture handles ISA DMA. First if CONFIG_GENERIC_ISA_DMA is set by the arch then we know that the arch needs ZONE_DMA because ISA DMA devices are supported. We can catch this in mm/Kconfig and do not need to modify arch code. Second, arches may use ZONE_DMA in an unknown way. We set CONFIG_ZONE_DMA for all arches that do not set CONFIG_GENERIC_ISA_DMA in order to insure backwards compatibility. The arches may later undefine ZONE_DMA if their arch code has been verified to not depend on ZONE_DMA. Signed-off-by:
Christoph Lameter <clameter@sgi.com> Cc: Andi Kleen <ak@suse.de> Cc: "Luck, Tony" <tony.luck@intel.com> Cc: Kyle McMartin <kyle@mcmartin.ca> Cc: Matthew Wilcox <willy@debian.org> Cc: James Bottomley <James.Bottomley@steeleye.com> Cc: Paul Mundt <lethal@linux-sh.org> Signed-off-by:
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- Feb 08, 2007
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Jennifer Hunt authored
From: Jennifer Hunt <jenhunt@us.ibm.com> This patch adds AF_IUCV socket support. Signed-off-by:
Frank Pavlic <fpavlic@de.ibm.com> Signed-off-by:
David S. Miller <davem@davemloft.net>
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Martin Schwidefsky authored
Add rewritten IUCV base code to net/iucv. Signed-off-by:
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Martin Schwidefsky authored
Remove the old IUCV code from drivers/s390/net Remove approprirate IUCV entries from drivers/s390/net/Makefile, drivers/s390/net/Kconfig and arch/s390/defconfig Signed-off-by:
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- Feb 05, 2007
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Heiko Carstens authored
Signed-off-by:
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