- 29 Aug, 2005 16 commits
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David Gibson authored
This patch adjust some comments in head.S for accuracy, clarity, and spelling. Signed-off-by: David Gibson <dwg@au1.ibm.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
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David Gibson authored
arch/ppc64/kernel/head.S #defines SECONDARY_PROCESSORS then has some #ifdefs based on it. Whatever purpose this had is long lost, this patch removes it. Likewise, head.S defines H_SET_ASR, which is now defined, along with other hypervisor call numbers in hvcall.h. This patch deletes it, as well, from head.S. Signed-off-by: David Gibson <dwg@au1.ibm.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
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David Gibson authored
An #if/#else construct near the top of ppc64's head.S appears to create overlapping sections of code for iSeries and pSeries (i.e. one thing on iSeries and something different in the same place on pSeries). In fact, checking the various absolute offsets, it doesn't. This patch unravels the #ifdefs to make it more obvious what's going on. This accomplishes another microstep towards a single kernel image which can boot both iSeries and pSeries. Signed-off-by: David Gibson <dwg@au1.ibm.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
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David Gibson authored
As well as the interrupt vectors and initialization code, head.S contains several asm functions which are used during runtime. This patch moves these to misc.S, a more sensible location for random asm support code. A couple The functions moved are: disable_kernel_fp giveup_fpu disable_kernel_altivec giveup_altivec __setup_cpu_power3 (empty function) Signed-off-by: David Gibson <dwg@au1.ibm.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
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David Gibson authored
On ppc64 machines with segment tables, CPU0's segment table is at a fixed address, currently 0x9000. This patch moves it to the free space at 0x6000, just below the fwnmi data area. This saves 8k of space in vmlinux and the runtime kernel image. Signed-off-by: David Gibson <dwg@au1.ibm.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
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David Gibson authored
In the ppc64 kernel head.S there is currently quite a lot of unused space between the naca (at fixed address 0x4000) and the fwnmi data area (at fixed address 0x7000). This patch moves various exception vectors and support code into this region to use the wasted space. The functions load_up_fpu and load_up_altivec are moved down as well, since they are essentially continuations of the fp_unavailable_common and altivec_unavailable_common vectors, respectively. Likewise, the fwnmi vectors themselves are moved down into this area, because while the location of the fwnmi data area is fixed by the RPA, the vectors themselves can be anywhere sufficiently low. Signed-off-by: David Gibson <dwg@au1.ibm.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
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David Gibson authored
Comments in head.S suggest that the iSeries naca has a fixed address, because tools expect to find it there. The only tool which appears to access the naca is addRamDisk, but both the in-kernel version and the version used in RHEL and SuSE in fact locate the NACA the same way as the hypervisor does, by following the pointer in the hvReleaseData structure. Since the requirement for a fixed address seems to be obsolete, this patch removes the naca from head.S and replaces it with a normal C initializer. For good measure, it removes an old version of addRamDisk.c which was sitting, unused, in the ppc32 tree. Signed-off-by: David Gibson <dwg@au1.ibm.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
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Stephen Rothwell authored
This patch just splits out the pSeries specific parts of vio.c. Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au> Signed-off-by: Paul Mackerras <paulus@samba.org>
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Stephen Rothwell authored
This patch allows us to have a different bus if matching function for each platform. Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au> Signed-off-by: Paul Mackerras <paulus@samba.org>
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Stephen Rothwell authored
Since the iSeries vio iommu tables cannot be used until after the vio bus has been initialised, move the initialisation of the tables to there. Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au> Signed-off-by: Paul Mackerras <paulus@samba.org>
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Stephen Rothwell authored
This patch splits the iSeries specific parts out of vio.c. Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au> Signed-off-by: Paul Mackerras <paulus@samba.org>
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Frank Rowand authored
arch/ppc64/Kconfig defines a "General setup" menu, but also sources init/Kconfig which also defines a "General setup" menu. Both of these menus appear at the top level of make menuconfig. Having two menus with the same name is confusing. This patch renames the ppc64/Kconfig menu to be "Bus Options" and moves options in this menu which are not bus related to the end of the "Platform support" menu. There are many variations among architectures on the exact naming of the "Bus Options" menu. I chose to use the simplest one, which is also used in arch/ppc/Kconfig. Signed-off-by: Frank Rowand <frowand@mvista.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
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Jake Moilanen authored
OpenFirmware marks devices as failed in the device-tree when a hardware problem is detected. The kernel needs to fail config reads/writes to prevent a kernel crash when incorrect data is read. This patch validates that the device-node is not marked "fail" when config space reads/writes are attempted. Signed-off-by: Jake Moilanen <moilanen@austin.ibm.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
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Benjamin Herrenschmidt authored
This patch updates the format of the flattened device-tree passed between the boot trampoline and the kernel to support a more compact representation, for use by embedded systems mostly. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
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David Gibson authored
Implement 4-level pagetables for ppc64 This patch implements full four-level page tables for ppc64, thereby extending the usable user address range to 44 bits (16T). The patch uses a full page for the tables at the bottom and top level, and a quarter page for the intermediate levels. It uses full 64-bit pointers at every level, thus also increasing the addressable range of physical memory. This patch also tweaks the VSID allocation to allow matching range for user addresses (this halves the number of available contexts) and adds some #if and BUILD_BUG sanity checks. Signed-off-by: David Gibson <dwg@au1.ibm.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
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Olaf Hering authored
Make the bootheader for ppc64 independent from kernel and libc headers. * add -nostdinc -isystem $gccincludes to not include libc headers * declare all functions in header files, also the stuff from string.S * declare some functions static * use stddef.h to get size_t (hopefully ok) * remove ppc32-types.h, only elf.h used the __NN types With further modifications by Paul Mackerras and Stephen Rothwell. Signed-off-by: Olaf Hering <olh@suse.de> Signed-off-by: Paul Mackerras <paulus@samba.org>
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- 28 Aug, 2005 5 commits
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Linus Torvalds authored
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Heiko Carstens authored
Bugfix (usage of uninitialized pointer in zfcp_port_dequeue) and compile fixes for the zfcp device driver. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Acked-by: James Bottomley <James.Bottomley@steeleye.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
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Alexey Dobriyan authored
struct zfcp_port::scsi_id was removed by commit 3859f6a2Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
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Linus Torvalds authored
Merge refs/heads/upstream-fixes from master.kernel.org:/pub/scm/linux/kernel/git/jgarzik/netdev-2.6
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Paul Mackerras authored
[ Same race and same patch also by Steven Rostedt <rostedt@goodmis.org> ] I have a laptop (G3 powerbook) which will pretty reliably hit a race between con_open and con_close late in the boot process and oops in vt_ioctl due to tty->driver_data being NULL. What happens is this: process A opens /dev/tty6; it comes into con_open() (drivers/char/vt.c) and assign a non-NULL value to tty->driver_data. Then process A closes that and concurrently process B opens /dev/tty6. Process A gets through con_close() and clears tty->driver_data, since tty->count == 1. However, before process A can decrement tty->count, we switch to process B (e.g. at the down(&tty_sem) call at drivers/char/tty_io.c line 1626). So process B gets to run and comes into con_open with tty->count == 2, as tty->count is incremented (in init_dev) before con_open is called. Because tty->count != 1, we don't set tty->driver_data. Then when the process tries to do anything with that fd, it oopses. The simple and effective fix for this is to test tty->driver_data rather than tty->count in con_open. The testing and setting of tty->driver_data is serialized with respect to the clearing of tty->driver_data in con_close by the console_sem. We can't get a situation where con_open sees tty->driver_data != NULL and then con_close on a different fd clears tty->driver_data, because tty->count is incremented before con_open is called. Thus this patch eliminates the race, and in fact with this patch my laptop doesn't oops. Signed-off-by: Paul Mackerras <paulus@samba.org> [ Same patch Signed-off-by: Steven Rostedt <rostedt@goodmis.org> in http://marc.theaimsgroup.com/?l=linux-kernel&m=112450820432121&w=2 ] Signed-off-by: Linus Torvalds <torvalds@osdl.org>
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- 27 Aug, 2005 16 commits
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Andreas Herrmann authored
This patch fixes a severe problem with 2.6.13-rc7. Due to recent SCSI changes it is not possible to add any LUNs to the zfcp device driver anymore. With registration of remote ports this is fixed. Signed-off-by: Andreas Herrmann <aherrman@de.ibm.com> Acked-by: James Bottomley <jejb@steeleye.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
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Jan Blunck authored
I know that scsi procfs is legacy code but this is a fix for a memory leak. While reading through sg.c I realized that the implementation of /proc/scsi/sg/devices with seq_file is leaking memory due to freeing the pointer returned by the next() iterator method. Since next() might return NULL or an error this is wrong. This patch fixes it through using the seq_files private field for holding the reference to the iterator object. Here is a small bash script to trigger the leak. Use slabtop to watch the size-32 usage grow and grow. #!/bin/sh while true; do cat /proc/scsi/sg/devices > /dev/null done Signed-off-by: Jan Blunck <j.blunck@tu-harburg.de> Acked-by: James Bottomley <James.Bottomley@steeleye.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
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Patrick Boettcher authored
Fixed race between submitting streaming URBs in the driver and starting the actual transfer in hardware (demodulator and USB controller) which sometimes lead to garbled data transfers. URBs are now submitted first, then the transfer is enabled. Dibusb devices and clones are now fully functional again. Signed-off-by: Patrick Boettcher <pb@linuxtv.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
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James Morris authored
This fixes a bug in the capifs initialization code, where the filesystem is not unregistered if kern_mount() fails. Signed-off-by: James Morris <jmorris@namei.org> Signed-off-by: Karsten Keil <kkeil@suse.de> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
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Eric W. Biederman authored
When acpi_sleep_prepare was moved into a shutdown method we started calling it for all shutdowns. It appears this triggers some systems to power off on reboot. Avoid this by only calling acpi_sleep_prepare if we are going to power off the system. Signed-off-by: Eric W. Biederman <ebiederm@xmission.com> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
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Al Viro authored
- copy_from_user() can fail; ->write() must check its return value. - severe buffer overruns both in ->read() and ->write() - lseek to the end (i.e. to mmapper_size) and if (count + *ppos > mmapper_size) count = count + *ppos - mmapper_size; will do absolutely nothing. Then it will call copy_to_user(buf,&v_buf[*ppos],count); with obvious results (similar for ->write()). Fixed by turning read to simple_read_from_buffer() and by doing normal limiting of count in ->write(). - gratitious lock_kernel() in ->mmap() - it's useless there. - lots of gratuitous includes. Signed-off-by: Al Viro <viro@parcelfarce.linux.theplanet.co.uk> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
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Ralf Baechle authored
Don't check type of sax25_family; dev_set_mac_address has already done that before and anyway, the type to check against would have been ARPHRD_AX25. We only got away because AF_AX25 and ARPHRD_AX25 both happen to be defined to the same value. Don't check sax25_ndigis either; it's value is insignificant for the purpose of setting the MAC address and the check has shown to break some application software for no good reason. Signed-off-by: Ralf Baechle DL5RB <ralf@linux-mips.org> Signed-off-by: Jeff Garzik <jgarzik@pobox.com>
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Ralf Baechle authored
I dropped the timer initialization bits by accident when sending the p-persistence fix. This patch gets the driver to work again on halfduplex links. Signed-off-by: Ralf Baechle DL5RB <ralf@linux-mips.org> Signed-off-by: Jeff Garzik <jgarzik@pobox.com>
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James Bottomley authored
The problem arises if an entity in sysfs is created and removed without ever having been made completely visible. In SCSI this is triggered by removing a device while it's initialising. The problem appears to be that because it was never made visible in sysfs, the sysfs dentry has a null d_inode which oopses when a reference is made to it. The solution is simply to check d_inode and assume the object was never made visible (and thus doesn't need deleting) if it's NULL. (akpm: possibly a stopgap for 2.6.13 scsi problems. May not be the long-term fix) Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com> Cc: Greg KH <greg@kroah.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
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NeilBrown authored
It's possible for this to still have flags in it and a previous instance has been stopped, and that confused the new array using the same mddev. Signed-off-by: Neil Brown <neilb@cse.unsw.edu.au> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
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NeilBrown authored
I just discovered this is needed for module auto-loading. Signed-off-by: Neil Brown <neilb@cse.unsw.edu.au> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
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Roland Dreier authored
Fix a use-after-free bug in userspace verbs cleanup: we can't touch mr->device after we free mr by calling ib_dereg_mr(). Signed-off-by: Roland Dreier <rolandd@cisco.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
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Deepak Saxena authored
We are currently reserving one byte more than actually needed by the flash device and overlapping into the next I/O expansion bus window. This a) causes us to allocate an extra page of VM due to ARM ioremap() alignment code and b) could cause problems if another driver tries to request the next expansion bus window. Signed-off-by: Deepak Saxena <dsaxena@plexity.net> Cc: Russell King <rmk@arm.linux.org.uk> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
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Andi Kleen authored
Some nodes can have large holes on x86-64. This fixes problems with the VM allowing too many dirty pages because it overestimates the number of available RAM in a node. In extreme cases you can end up with all RAM filled with dirty pages which can lead to deadlocks and other nasty behaviour. This patch just tells the VM about the known holes from e820. Reserved (like the kernel text or mem_map) is still not taken into account, but that should be only a few percent error now. Small detail is that the flat setup uses the NUMA free_area_init_node() now too because it offers more flexibility. (akpm: lotsa thanks to Martin for working this problem out) Cc: Martin Bligh <mbligh@mbligh.org> Signed-off-by: Andi Kleen <ak@suse.de> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
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Mark M. Hoffman authored
This patch fixes several instances of hwmon drivers kfree'ing the "wrong" pointer; the existing code works somewhat by accident. (akpm: plucked from Greg's queue based on lkml discussion. Finishes off the patch from Jon Corbet) Signed-off-by: Mark M. Hoffman <mhoffman@lightlink.com> Signed-off-by: Jean Delvare <khali@linux-fr.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
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Anton Blanchard authored
I recently had a BUG_ON() go off spuriously on a gcc 4.0 compiled kernel. It turns out gcc-4.0 was removing a sign extension while earlier gcc versions would not. Thinking this to be a compiler bug, I submitted a report: http://gcc.gnu.org/bugzilla/show_bug.cgi?id=23422 It turns out we need to cast the input in order to tell gcc to sign extend it. Thanks to Andrew Pinski for his help on this bug. Signed-off-by: Anton Blanchard <anton@samba.org> Cc: Paul Mackerras <paulus@samba.org> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
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- 26 Aug, 2005 3 commits
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Paul Jackson authored
At the suggestion of Nick Piggin and Dinakar, totally disable the facility to allow cpu_exclusive cpusets to define dynamic sched domains in Linux 2.6.13, in order to avoid problems first reported by John Hawkes (corrupt sched data structures and kernel oops). This has been built for ppc64, i386, ia64, x86_64, sparc, alpha. It has been built, booted and tested for cpuset functionality on an SN2 (ia64). Dinakar or Nick - could you verify that it for sure does avoid the problems Hawkes reported. Hawkes is out of town, and I don't have the recipe to reproduce what he found. Signed-off-by: Paul Jackson <pj@sgi.com> Acked-by: Nick Piggin <npiggin@suse.de> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
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Paul Jackson authored
The partial disabling of Dinakar's new facility to allow cpu_exclusive cpusets to define dynamic sched domains doesn't go far enough. At the suggestion of Nick Piggin and Dinakar, let us instead totally disable this facility for 2.6.13, in order to avoid problems first reported by John Hawkes (corrupt sched data structures and kernel oops). This patch removes the partial disabling code in 2.6.13-rc7, in anticipation of the next patch, which will totally disable it instead. Signed-off-by: Paul Jackson <pj@sgi.com> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
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Linus Torvalds authored
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