- 01 4月, 2006 15 次提交
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Call arch_switch also in switch_to_skas, even if it's, for now, a no-op for that case (and mark this in the comment); this will change soon. Also, arch_switch for TT mode is actually useless when the PT proxy (a complicate debugging instrumentation for TT mode) is not enabled. In fact, it only calls update_debugregs, which checks debugregs_seq against seq (to check if the registers are up-to-date - seq here means a "version number" of the registers). If the ptrace proxy is not enabled, debugregs_seq always stays 0 and update_debugregs will be a no-op. So, optimize this out (the compiler can't do it). Also, I've been disappointed by the fact that it would make a lot of sense if, after calling a successful update_debugregs(current->thread.arch.debugregs_seq), current->thread.arch.debugregs_seq were updated with the new debugregs_seq. But this is not done. Is this a bug or a feature? For all purposes, it seems a bug (otherwise the whole mechanism does not make sense, which is also a possibility to check), which causes some performance only problems (not correctness), since we write_debugregs when not needed. Also, as suggested by Jeff, remove a redundant enabling of SIGVTALRM, comprised in the subsequent local_irq_enable(). I'm just a bit dubious if ordering matters there... Signed-off-by: NPaolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it> Acked-by: NJeff Dike <jdike@addtoit.com> Signed-off-by: NAndrew Morton <akpm@osdl.org> Signed-off-by: NLinus Torvalds <torvalds@osdl.org>
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ldt-{i386,x86_64}.h is made of two different parts - some code for parsing of LDT descriptors, which is arch-dependant, and the code to handle uml_ldt_t (an LDT block inside UML), which is mostly arch-independant (among x86 and x86_64, at least). Join the common part in a single file (ldt.h) and split the rest away (host_ldt-{i386,x86_64}.h). This is needed because processor.h, with next patches, will start including the LDT descriptor parsing macros in host_ldt.h, but it can't include ldt.h because it uses semaphores (and to define semaphores one must first include processor.h!). Signed-off-by: NPaolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it> Acked-by: NJeff Dike <jdike@addtoit.com> Signed-off-by: NAndrew Morton <akpm@osdl.org> Signed-off-by: NLinus Torvalds <torvalds@osdl.org>
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Comparing this code which is the actual body of the arch-independent cpu_idle(), it is clear that it's unnecessary to set ->mm and ->active_mm; beyond that, a kernel thread is not supposed to have ->mm != NULL, only active_mm. This showed up because I used the assumption (which is IMHO valid) that kernel thread have their ->mm == NULL, and it failed for this thread. Signed-off-by: NPaolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it> Acked-by: NJeff Dike <jdike@addtoit.com> Signed-off-by: NAndrew Morton <akpm@osdl.org> Signed-off-by: NLinus Torvalds <torvalds@osdl.org>
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由 Al Viro 提交于
type-safe min() in arch/um/drivers/mconsole_kern.c Signed-off-by: NAl Viro <viro@zeniv.linux.org.uk> Signed-off-by: NJeff Dike <jdike@addtoit.com> Cc: Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it> Signed-off-by: NAndrew Morton <akpm@osdl.org> Signed-off-by: NLinus Torvalds <torvalds@osdl.org>
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由 Al Viro 提交于
Removed assignments to unused variables in arch/um/os-Linux/Makefile Signed-off-by: NAl Viro <viro@zeniv.linux.org.uk> Signed-off-by: NJeff Dike <jdike@addtoit.com> Cc: Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it> Signed-off-by: NAndrew Morton <akpm@osdl.org> Signed-off-by: NLinus Torvalds <torvalds@osdl.org>
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由 Al Viro 提交于
misc sparse annotations Signed-off-by: NAl Viro <viro@zeniv.linux.org.uk> Signed-off-by: NJeff Dike <jdike@addtoit.com> Cc: Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it> Signed-off-by: NAndrew Morton <akpm@osdl.org> Signed-off-by: NLinus Torvalds <torvalds@osdl.org>
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由 Al Viro 提交于
kconfig sanitized around drivers/net Signed-off-by: NAl Viro <viro@zeniv.linux.org.uk> Signed-off-by: NJeff Dike <jdike@addtoit.com> Cc: Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it> Signed-off-by: NAndrew Morton <akpm@osdl.org> Signed-off-by: NLinus Torvalds <torvalds@osdl.org>
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由 Al Viro 提交于
no need to add the same file twice to MRPROPER_FILES Signed-off-by: NAl Viro <viro@zeniv.linux.org.uk> Signed-off-by: NJeff Dike <jdike@addtoit.com> Cc: Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it> Signed-off-by: NAndrew Morton <akpm@osdl.org> Signed-off-by: NLinus Torvalds <torvalds@osdl.org>
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由 Al Viro 提交于
kills unmap magic Signed-off-by: NAl Viro <viro@zeniv.linux.org.uk> Signed-off-by: NJeff Dike <jdike@addtoit.com> Cc: Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it> Signed-off-by: NAndrew Morton <akpm@osdl.org> Signed-off-by: NLinus Torvalds <torvalds@osdl.org>
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由 Al Viro 提交于
kills symlinks in arch/um/sys-* Signed-off-by: NAl Viro <viro@zeniv.linux.org.uk> Signed-off-by: NJeff Dike <jdike@addtoit.com> Cc: Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it> Signed-off-by: NAndrew Morton <akpm@osdl.org> Signed-off-by: NLinus Torvalds <torvalds@osdl.org>
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由 Jeff Dike 提交于
A number of UML initcalls were improperly returning 1. Also removed any nearby emacs formatting comments. Signed-off-by: NJeff Dike <jdike@addtoit.com> Cc: Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it> Signed-off-by: NAndrew Morton <akpm@osdl.org> Signed-off-by: NLinus Torvalds <torvalds@osdl.org>
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由 Jeff Dike 提交于
The earlier printf patch missed a corresponding change in the printed variable. Signed-off-by: NJeff Dike <jdike@addtoit.com> Cc: Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it> Signed-off-by: NAndrew Morton <akpm@osdl.org> Signed-off-by: NLinus Torvalds <torvalds@osdl.org>
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由 Jeff Dike 提交于
Changes since first version added check for MADV_REMOVE support on the host fixed error return botch shrunk sprintf array by one character This adds hotplug memory support to UML. The mconsole syntax is config mem=[+-]n[KMG] In other words, add or subtract some number of kilobytes, megabytes, or gigabytes. Unplugged pages are allocated and then madvise(MADV_TRUNCATE), which is a currently experimental madvise extension. These pages are tracked so they can be plugged back in later if the admin decides to give them back. The first page to be unplugged is used to keep track of about 4M of other pages. A list_head is the first thing on this page. The rest is filled with addresses of other unplugged pages. This first page is not madvised, obviously. When this page is filled, the next page is used in a similar way and linked onto a list with the first page. Etc. This whole process reverses when pages are plugged back in. When a tracking page no longer tracks any unplugged pages, then it is next in line for plugging, which is done by freeing pages back to the kernel. Signed-off-by: NJeff Dike <jdike@addtoit.com> Cc: Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it> Signed-off-by: NAndrew Morton <akpm@osdl.org> Signed-off-by: NLinus Torvalds <torvalds@osdl.org>
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由 Vivek Goyal 提交于
Porting the patch I posted for x86_64 to i386. http://marc.theaimsgroup.com/?l=linux-kernel&m=114178139610707&w=2 o While using kdump, after a system crash when second kernel boots, timer vector gets (0x31) locked and CPU does not see timer interrupts travelling from IOAPIC to APIC. Currently it does not lead to boot failure in second kernel as timer interrupts continues to come as ExtInt through LAPIC directly, but fixing it is good in case some boards do not support the other mode. o After a system crash, it is not safe to service interrupts any more, hence interrupts are disabled. This leads to pending interrupts at LAPIC. LAPIC sends these interrupts to the CPU during early boot of second kernel. Other pending interrupts are discarded saying unexpected trap but timer interrupt is serviced and CPU does not issue an LAPIC EOI because it think this interrupt came from i8259 and sends ack to 8259. This leads to vector 0x31 locking as LAPIC does not clear respective ISR and keeps on waiting for EOI. o This patch issues extra EOI for the pending interrupts who have ISR set. o Though today only timer seems to be the special case because in early boot it thinks interrupts are coming from i8259 and uses mask_and_ack_8259A() as ack handler and does not issue LAPIC EOI. But probably doing it in generic manner for all vectors makes sense. Signed-off-by: NVivek Goyal <vgoyal@in.ibm.com> Cc: "Eric W. Biederman" <ebiederm@xmission.com> Cc: Andi Kleen <ak@muc.de> Signed-off-by: NAndrew Morton <akpm@osdl.org> Signed-off-by: NLinus Torvalds <torvalds@osdl.org>
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由 KAMEZAWA Hiroyuki 提交于
for_each_cpu() actually iterates across all possible CPUs. We've had mistakes in the past where people were using for_each_cpu() where they should have been iterating across only online or present CPUs. This is inefficient and possibly buggy. We're renaming for_each_cpu() to for_each_possible_cpu() to avoid this in the future. This patch replaces for_each_cpu with for_each_possible_cpu. Signed-off-by: NKAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com> Cc: Paul Mundt <lethal@linux-sh.org> Cc: Kazumoto Kojima <kkojima@rr.iij4u.or.jp> Signed-off-by: NAndrew Morton <akpm@osdl.org> Signed-off-by: NLinus Torvalds <torvalds@osdl.org>
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- 31 3月, 2006 19 次提交
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由 Jens Axboe 提交于
This adds support for the sys_splice system call. Using a pipe as a transport, it can connect to files or sockets (latter as output only). From the splice.c comments: "splice": joining two ropes together by interweaving their strands. This is the "extended pipe" functionality, where a pipe is used as an arbitrary in-memory buffer. Think of a pipe as a small kernel buffer that you can use to transfer data from one end to the other. The traditional unix read/write is extended with a "splice()" operation that transfers data buffers to or from a pipe buffer. Named by Larry McVoy, original implementation from Linus, extended by Jens to support splicing to files and fixing the initial implementation bugs. Signed-off-by: NJens Axboe <axboe@suse.de> Signed-off-by: NLinus Torvalds <torvalds@osdl.org>
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由 Stuart Brady 提交于
With c3000_defconfig and b180_defconfig, FAT couldn't be used because no NLS modules were built. Signed-off-by: NStuart Brady <sdb@parisc-linux.org> Signed-off-by: NKyle McMartin <kyle@parisc-linux.org>
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由 Kyle McMartin 提交于
Some symbols are exported both in parisc_ksyms.c, and at their definition site. Nuke the redundant EXPORT_SYMBOL in ksyms to quiet warnings when vmlinux is linked. Signed-off-by: NKyle McMartin <kyle@parisc-linux.org>
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由 Kyle McMartin 提交于
Move ioremap/iounmap EXPORT_SYMBOL to ioremap.c where they belong. Signed-off-by: NKyle McMartin <kyle@parisc-linux.org>
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由 Helge Deller 提交于
Signed-off-by: NHelge Deller <deller@parisc-linux.org> Signed-off-by: NKyle McMartin <kyle@parisc-linux.org>
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由 Kyle McMartin 提交于
Signed-off-by: NKyle McMartin <kyle@parisc-linux.org>
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由 Helge Deller 提交于
Fix up some ISA/EISA stuff. (Note: isa_ accessors have been removed from asm/io.h) Signed-off-by: NHelge Deller <deller@parisc-linux.org> Signed-off-by: NKyle McMartin <kyle@parisc-linux.org>
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由 Kyle McMartin 提交于
compat_sys_getsockopt exists, so we should use that, instead of directly using sys_getsockopt on 64-bit compiles. Signed-off-by: NKyle McMartin <kyle@parisc-linux.org>
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由 Helge Deller 提交于
Remove CONFIG_DEBUG_IOREMAP, it's now obsolete and won't work anyway. Remove it from lib/KConfig since it was only available on parisc. Signed-off-by: NHelge Deller <deller@parisc-linux.org> Signed-off-by: NKyle McMartin <kyle@parisc-linux.org>
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由 Helge Deller 提交于
Signed-off-by: NHelge Deller <deller@parisc-linux.org> Signed-off-by: NKyle McMartin <kyle@parisc-linux.org>
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由 Helge Deller 提交于
Enable CONFIG_HPPA_IOREMAP by default and remove all now unnecessary code. Signed-off-by: NHelge Deller <deller@parisc-linux.org> Signed-off-by: NKyle McMartin <kyle@parisc-linux.org>
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由 Helge Deller 提交于
Instead of making it a #define in asm/io.h, allow user to select to turn on IOREMAP from the config menu. Signed-off-by: NHelge Deller <deller@parisc-linux.org> Signed-off-by: NKyle McMartin <kyle@parisc-linux.org>
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由 Helge Deller 提交于
We were only copying 32-bits of the PTE/PFN, not the full 52-bits. Signed-off-by: NHelge Deller <deller@parisc-linux.org> Signed-off-by: NKyle McMartin <kyle@parisc-linux.org>
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由 James Bottomley 提交于
We need to do a little renaming of our original syntax because of the difference in arguments. Signed-off-by: NJames Bottomley <jejb@parisc-linux.org> Signed-off-by: NKyle McMartin <kyle@parisc-linux.org>
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由 Helge Deller 提交于
Addresses in F-space must be accessed uncached on most parisc machines. Signed-off-by: NHelge Deller <deller@parisc-linux.org> Signed-off-by: NKyle McMartin <kyle@parisc-linux.org>
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由 Helge Deller 提交于
I think it's time to enable free_initrd_mem() again... Signed-off-by: NHelge Deller <deller@parisc-linux.org> Signed-off-by: NKyle McMartin <kyle@parisc-linux.org>
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由 Thibaut VARENE 提交于
pdc_stable.c is explicitly licensed under GPL version 2. Signed-off-by: NThibaut VARENE <varenet@parisc-linux.org> Signed-off-by: NKyle McMartin <kyle@parisc-linux.org>
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由 Bjorn Helgaas 提交于
efi_memmap_init() collects full granules of WB memory, without regard for whether they also support UC. So in order for ioremap() to work for main memory, it must prefer WB mappings when possible. Signed-off-by: NBjorn Helgaas <bjorn.helgaas@hp.com> Signed-off-by: NTony Luck <tony.luck@intel.com>
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由 Jes Sorensen 提交于
Add __mca_table to the DISCARD list for the gate.lds linker script to avoid broken linker references when linking the final vmlinux file. Also add comment to include/asm-ia64/asmmacros.h to avoid anyone else hitting this problem in the future. Credits to James Bottomley <James.Bottomley@SteelEye.com> for spotting the DISCARD list in gate.lds.S Signed-off-by: NJes Sorensen <jes@sgi.com> Signed-off-by: NTony Luck <tony.luck@intel.com>
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- 30 3月, 2006 1 次提交
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由 Russ Anderson 提交于
Move __mca_table out of the __init section. Signed-off-by: NTony Luck <tony.luck@intel.com>
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- 29 3月, 2006 5 次提交
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由 Anton Blanchard 提交于
Remove oprofile spinlock backtrace code now we have proper calltrace support. Also make MMCRA sihv and sipr bits a variable since they may change in future cpus. Finally, MMCRA should be a 64bit quantity. Signed-off-by: NAnton Blanchard <anton@samba.org> Signed-off-by: NPaul Mackerras <paulus@samba.org>
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由 Anton Blanchard 提交于
Add calltrace support for other powerpc cpus. Tested on 7450. Signed-off-by: NAnton Blanchard <anton@samba.org> Signed-off-by: NPaul Mackerras <paulus@samba.org>
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由 Brian Rogan 提交于
Add oprofile calltrace support to powerpc. Disable spinlock backtracing now we can use calltrace info. (Updated to work on both 32bit and 64bit by me). Signed-off-by: NAnton Blanchard <anton@samba.org> Signed-off-by: NPaul Mackerras <paulus@samba.org>
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由 KAMEZAWA Hiroyuki 提交于
for_each_cpu() actually iterates across all possible CPUs. We've had mistakes in the past where people were using for_each_cpu() where they should have been iterating across only online or present CPUs. This is inefficient and possibly buggy. We're renaming for_each_cpu() to for_each_possible_cpu() to avoid this in the future. This patch replaces for_each_cpu with for_each_possible_cpu. Signed-off-by: NKAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com> Signed-off-by: NAndrew Morton <akpm@osdl.org> Signed-off-by: NPaul Mackerras <paulus@samba.org>
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由 KAMEZAWA Hiroyuki 提交于
for_each_cpu() actually iterates across all possible CPUs. We've had mistakes in the past where people were using for_each_cpu() where they should have been iterating across only online or present CPUs. This is inefficient and possibly buggy. We're renaming for_each_cpu() to for_each_possible_cpu() to avoid this in the future. This patch replaces for_each_cpu with for_each_possible_cpu. Signed-off-by: NKAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com> Signed-off-by: NAndrew Morton <akpm@osdl.org> Signed-off-by: NPaul Mackerras <paulus@samba.org>
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