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* [PATCH] x86_64: GART DMA merging fixAndi Kleen2006-02-12
| | | | | | | | | | | | | | Don't touch the non DMA members in the sg list in dma_map_sg in the IOMMU Some drivers (in particular ST) ran into problems because they reused the sg lists after passing them to pci_map_sg(). The merging procedure in the K8 GART IOMMU corrupted the state. This patch changes it to only touch the dma* entries during merging, but not the other fields. Approach suggested by Dave Miller. Signed-off-by: Andi Kleen <ak@suse.de> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] arch/x86_64/kernel/traps.c PTRACE_SINGLESTEP oopsJohn Blackwood2006-02-12
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | We found a problem with x86_64 kernels with preemption enabled, where having multiple tasks doing ptrace singlesteps around the same time will cause the system to 'oops'. The problem seems that a task can get preempted out of the do_debug() processing while it is running on the DEBUG_STACK stack. If another task on that same cpu then enters do_debug() and uses the same per-cpu DEBUG_STACK stack, the previous preempted tasks's stack contents can be corrupted, and the system will oops when the preempted task is context switched back in again. The typical oops looks like the following: Unable to handle kernel paging request at ffffffffffffffae RIP: <ffffffff805452a1>{thread_return+34} PGD 103027 PUD 102429067 PMD 0 Oops: 0002 [1] PREEMPT SMP CPU 0 Modules linked in: Pid: 3786, comm: ssdd Not tainted 2.6.15.2 #1 RIP: 0010:[<ffffffff805452a1>] <ffffffff805452a1>{thread_return+34} RSP: 0018:ffffffff80824058 EFLAGS: 000136c2 RAX: ffff81017e12cea0 RBX: 0000000000000000 RCX: 00000000c0000100 RDX: 0000000000000000 RSI: ffff8100f7856e20 RDI: ffff81017e12cea0 RBP: 0000000000000046 R08: ffff8100f68a6000 R09: 0000000000000000 R10: 0000000000000000 R11: ffff81017e12cea0 R12: ffff81000c2d53e8 R13: ffff81017f5b3be8 R14: ffff81000c0036e0 R15: 000001056cbfc899 FS: 00002aaaaaad9b00(0000) GS:ffffffff80883800(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 000000008005003b CR2: ffffffffffffffae CR3: 00000000f6fcf000 CR4: 00000000000006e0 Process ssdd (pid: 3786, threadinfo ffff8100f68a6000, task ffff8100f7856e20) Stack: ffffffff808240d8 ffffffff8012a84a ffff8100055f6c00 0000000000000020 0000000000000001 ffff81000c0036e0 ffffffff808240b8 0000000000000000 0000000000000000 0000000000000000 Call Trace: <#DB> <ffffffff8012a84a>{try_to_wake_up+985} <ffffffff8012c0d3>{kick_process+87} <ffffffff8013b262>{signal_wake_up+48} <ffffffff8013b5ce>{specific_send_sig_info+179} <ffffffff80546abc>{_spin_unlock_irqrestore+27} <ffffffff8013b67c>{force_sig_info+159} <ffffffff801103a0>{do_debug+289} <ffffffff80110278>{sync_regs+103} <ffffffff8010ed9a>{paranoid_userspace+35} Unable to handle kernel paging request at 00007fffffb7d000 RIP: <ffffffff8010f2e4>{show_trace+465} PGD f6f25067 PUD f6fcc067 PMD f6957067 PTE 0 Oops: 0000 [2] PREEMPT SMP This patch disables preemptions for the task upon entry to do_debug(), before interrupts are reenabled, and then disables preemption before exiting do_debug(), after disabling interrupts. I've noticed that the task can be preempted either at the end of an interrupt, or on the call to force_sig_info() on the spin_unlock_irqrestore() processing. It might be better to attempt to code a fix in entry.S around the code that calls do_debug(). Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] s390: fstatat64 supportHeiko Carstens2006-02-12
| | | | | | | | | Add fstatat64 support to s390 in order to follow changes with commit cff2b760096d1e6feaa31948e7af4abbefe47822 . Also fixes compilation for 31 bit. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] s390: add support for unshare system callHeiko Carstens2006-02-12
| | | | | | | | Add support for unshare system call. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] s390: fix non smp build of kexecHeiko Carstens2006-02-12
| | | | | | | | | Add missing smp_cpu_not_running define to avoid build warnings in the non smp case. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] s390: earlier initialization of cpu_possible_mapHeiko Carstens2006-02-12
| | | | | | | | | | Initiliazing of cpu_possible_map was done in smp_prepare_cpus which is way too late. Therefore assign a static value to cpu_possible_map, since we don't have access to max_cpus in setup_arch. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] s390: update default configurationHeiko Carstens2006-02-12
| | | | | | | | Switch on CONFIG_DEBUG_FS again. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] x86: print out early faults via early_printk()Ingo Molnar2006-02-12
| | | | | | | | | | | | | | | Lost a few hours debugging an early-bootup fault within printk itself, which manifested itself as a hard to debug early hang. This patch makes it much easier by printing out early faults via early_printk(), which function is a lot simpler than a full printk, and hence more likely to succeed in emergencies. (We do not recover from early faults anyway, so there's no loss from not having these messages in the normal printk buffer.) Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] x86-64: Fix HPET timer on x460Chris McDermott2006-02-12
| | | | | | | | | | | | | | | | | | | | | | | | [description from AK] The IBM Summit 3 chipset doesn't implement the HPET timer replacement option. Since the current Linux code relies on it use a mixed mode with both PIT for the interrupt and HPET counters for the time keeping. That was already implemented, but didn't work properly because it was still using the last interrupt offset in HPET. This resulted in x460 not booting. Fix this up by using the free running HPET counter. Shouldn't affect any other machine because they either use full HPET mode or no HPET at all. TBD needs a similar 32bit fix. Signed-off-by: Andi Kleen <ak@suse.de> Cc: Pallipadi, Venkatesh" <venkatesh.pallipadi@intel.com> Cc: Bob Picco <bob.picco@hp.com> Cc: Bjorn Helgaas <bjorn.helgaas@hp.com> Cc: john stultz <johnstul@us.ibm.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] Add wording to m68k .S files to help clarify license infoMatt Waddel2006-02-12
| | | | | | | | Acked-by: Alan Cox <alan@redhat.com> Signed-off-by: Matt Waddel <Matt.Waddel@freescale.com> Cc: Roman Zippel <zippel@linux-m68k.org> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] fstatat64 supportUlrich Drepper2006-02-12
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | The *at patches introduced fstatat and, due to inusfficient research, I used the newfstat functions generally as the guideline. The result is that on 32-bit platforms we don't have all the information needed to implement fstatat64. This patch modifies the code to pass up 64-bit information if __ARCH_WANT_STAT64 is defined. I renamed the syscall entry point to make this clear. Other archs will continue to use the existing code. On x86-64 the compat code is implemented using a new sys32_ function. this is what is done for the other stat syscalls as well. This patch might break some other archs (those which define __ARCH_WANT_STAT64 and which already wired up the syscall). Yet others might need changes to accomodate the compatibility mode. I really don't want to do that work because all this stat handling is a mess (more so in glibc, but the kernel is also affected). It should be done by the arch maintainers. I'll provide some stand-alone test shortly. Those who are eager could compile glibc and run 'make check' (no installation needed). The patch below has been tested on x86 and x86-64. Signed-off-by: Ulrich Drepper <drepper@redhat.com> Cc: Christoph Hellwig <hch@lst.de> Cc: Andi Kleen <ak@muc.de> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* Merge master.kernel.org:/home/rmk/linux-2.6-armLinus Torvalds2006-02-10
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| * [ARM] 3326/1: H1940 - Control latchesBen Dooks2006-02-10
| | | | | | | | | | | | | | | | | | | | | | Patch from Ben Dooks Define the bits for the two board control latches that control various items on the H1940 iPAQ. Signed-off-by: Ben Dooks <ben-linux@fluff.org> Signed-off-by: Arnaud Patard <arnaud.patard@rtp-net.org> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
| * [ARM] 3314/1: S3C2400 - adds s3c2400.hLucas Correia Villa Real2006-02-09
| | | | | | | | | | | | | | | | | | | | | | Patch from Lucas Correia Villa Real This patch adds s3c2400.h, fixing the build for the 2410/2440 platforms. Signed-off-by: Lucas Correia Villa Real <lucasvr@gobolinux.org> Signed-off-by: Ben Dooks <ben-linux@fluff.org> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
* | Merge git://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc-mergeLinus Torvalds2006-02-10
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| * | [PATCH] powerpc: Add CONFIG_DEFAULT_UIMAGE for embedded boardsKumar Gala2006-02-10
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Embedded boards that u-boot require a kernel image in the uImage format. This allows a given board to specify it wants a uImage built by default. This also fixes a warning at config time, as this symbol is referred to in arch/powerpc/platforms/83xx/Kconfig. Signed-off-by: Kumar Gala <galak@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
| * | [PATCH] powerpc: unshare system call registrationJANAK DESAI2006-02-10
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Registers system call for the powerpc architecture. Signed-off-by: Janak Desai <janak@us.ibm.com> Cc: Al Viro <viro@ftp.linux.org.uk> Cc: Christoph Hellwig <hch@lst.de> Cc: Michael Kerrisk <mtk-manpages@gmx.net> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Andi Kleen <ak@muc.de> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
| * | ppc: Use the system call table from arch/powerpc/kernel/systbl.SPaul Mackerras2006-02-10
| | | | | | | | | | | | | | | | | | | | | With this, new system calls only have to be wired up in one place for ARCH=ppc and ARCH=powerpc, rather than 2. Signed-off-by: Paul Mackerras <paulus@samba.org>
* | | [PATCH] Fix s390 build failure.Dave Jones2006-02-10
| | | | | | | | | | | | | | | | | | | | | | | | arch/s390/kernel/compat_signal.c:199: error: conflicting types for 'do_sigaction' include/linux/sched.h:1115: error: previous declaration of 'do_sigaction' was here Signed-off-by: Dave Jones <davej@redhat.com> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* | | [PATCH] x86: don't initialise cpu_possible_map to all onesAndrew Morton2006-02-10
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Initialising cpu_possible_map to all-ones with CONFIG_HOTPLUG_CPU means that a) All for_each_cpu() loops will iterate across all NR_CPUS CPUs, rather than over possible ones. That can be quite expensive. b) Soon we'll be allocating per-cpu areas only for possible CPUs. So with CPU_MASK_ALL, we'll be wasting memory. I also switched voyager over to not use CPU_MASK_ALL in the non-CPU-hotplug case. Should be OK.. I note that parisc is also using CPU_MASK_ALL. Suggest that it stop doing that. Cc: James Bottomley <James.Bottomley@steeleye.com> Cc: Kyle McMartin <kyle@mcmartin.ca> Cc: Paul Jackson <pj@sgi.com> Cc: Ashok Raj <ashok.raj@intel.com> Cc: Zwane Mwaikambo <zwane@linuxpower.ca> Cc: Paul Jackson <pj@sgi.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* | | [PATCH] Fix building external modules on ppc32Andreas Gruenbacher2006-02-10
|/ / | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | We are setting up sources for building external modules like this: /usr/src/linux-obj> # create a .config file /usr/src/linux-obj> make -C /usr/src/linux O=$PWD oldconfig /usr/src/linux-obj> make -C /usr/src/linux O=$PWD prepare /usr/src/linux-obj> make -C /usr/src/linux O=$PWD scripts /usr/src/linux-obj> make -C /usr/src/linux O=$PWD clean After that, external modules can be built with: /usr/src/module> make -C /usr/src/linux-obj M=$PWD This fails for ppc32 because the `make clean' removes the arch/powerpc/include directory. This should be done in archmrproper instead of in archclean. Signed-off-by: Andreas Gruenbacher <agruen@suse.de> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Paul Mackerras <paulus@samba.org> Cc: Sam Ravnborg <sam@ravnborg.org> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* | Merge branch 'release' of ↵Linus Torvalds2006-02-09
|\ \ | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/aegl/linux-2.6
| * \ Pull new-syscalls into release branchTony Luck2006-02-09
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| | * | [IA64] unshare system call registration for ia64Janak Desai2006-02-08
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Registers system call for the ia64 architecture. Reserves space for ppoll and pselect, and adds unshare at system call number 1296. Signed-off-by: Janak Desai <janak@us.ibm.com> Signed-off-by: Tony Luck <tony.luck@intel.com>
| | * | [IA64] add syscall entry for *at()Chen, Kenneth W2006-02-06
| | | | | | | | | | | | | | | | | | | | | | | | | | | | Wire up the ia64 syscalls for *at() functions. Signed-off-by: Ken Chen <kenneth.w.chen@intel.com> Signed-off-by: Tony Luck <tony.luck@intel.com>
| * | | [IA64] mca_drv: Add minstate validationHidetoshi Seto2006-02-09
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | MCA driver can cause panic if kernel gets a state info with no minstate. This patch adds minstate validation before handling it. Signed-off-by: Hidetoshi Seto <seto.hidetoshi@jp.fujitsu.com> Signed-off-by: Tony Luck <tony.luck@intel.com>
| * | | [IA64] sys32_signal() forgets to initialize ->sa_maskTony Luck2006-02-09
| | | | | | | | | | | | | | | | | | | | | | | | | | | | Pointed out by Oleg Nesterov <oleg@tv-sign.ru>, who in turn got the hint from Linus. Signed-off-by: Tony Luck <tony.luck@intel.com>
| * | | [IA64-SGI] Small cleanup for misuse of list_for_each to list_for_each_safe.Prarit Bhargava2006-02-09
| | | | | | | | | | | | | | | | | | | | | | | | | | | | Patch was suggested by Kenneth W. Chen here Signed-off-by: Prarit Bhargava <prarit@sgi.com> Signed-off-by: Tony Luck <tony.luck@intel.com>
| * | | [IA64-SGI] Hotplug driver related fix in the SN ia64 code.Prarit Bhargava2006-02-09
| | |/ | |/| | | | | | | | | | | | | | | | | | | Remove an erroneous kfree, and unlink the pcidev_info struct from the pcidev_info list prior to free'ing the pcidev_info struct. Signed-off-by: Prarit Bhargava <prarit@sgi.com> Signed-off-by: Tony Luck <tony.luck@intel.com>
* / | [SPARC64]: Fix sys_newfstatat syscall table entry for 64-bit.Heiko Carstens2006-02-09
|/ / | | | | | | | | | | | | | | The sparc64 64 bit syscall table seems to be broken as it has compat_sys_newfstatat in its syscall table instead of sys_newfstatat. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* | Merge branch 'release' of ↵Linus Torvalds2006-02-08
|\ \ | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/aegl/linux-2.6
| * | [IA64] prevent sn2 specific code to be run in generic kernelsJes Sorensen2006-02-08
| | | | | | | | | | | | | | | | | | | | | | | | Prevent SN2 specific code to be executed on non SN2 platforms when running a generic kernel. Signed-off-by: Jes Sorensen <jes@sgi.com> Signed-off-by: Tony Luck <tony.luck@intel.com>
| * | [IA64] Fix CONFIG_PRINTK_TIMETony Luck2006-02-07
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | There were two problems with enabling the PRINTK_TIME config option: 1) The first calls to printk() occur before per-cpu data virtual address is pinned into the TLB, so sched_clock() can fault. 2) sched_clock() is based on ar.itc, which may not be synchronized across cpus. Ken Chen started this patch, Tony Luck tinkered with it, and Jes Sorensen perfected it. Signed-off-by: Tony Luck <tony.luck@intel.com>
| * | [IA64] Fix wrong use of memparse in efi.cZou Nan hai2006-02-07
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The check of (end != cp) after memparse in efi.c looks wrong to me. The result is that we can't use mem= and max_addr= kernel parameter at the same time. The following patch removed the check just like other arches do. Signed-off-by: Zou Nan hai <nanhai.zou@intel.com> Signed-off-by: Tony Luck <tony.luck@intel.com>
| * | [IA64] Fix a possible buffer overflow in efi.cZou Nan hai2006-02-07
| | | | | | | | | | | | | | | | | | | | | Make sure to save space for the trailing '\0'. Signed-off-by: Zou Nan hai <nanhai.zou@intel.com> Signed-off-by: Tony Luck <tony.luck@intel.com>
* | | [PATCH] x86-64: Add sys_unshareAndi Kleen2006-02-08
| | | | | | | | | | | | | | | | | | | | | | | | | | | Add unshare syscall for x86-64 ppoll/pselect are not ready yet, but add reservations. Signed-off-by: Andi Kleen <ak@suse.de> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* | | Merge master.kernel.org:/home/rmk/linux-2.6-serialLinus Torvalds2006-02-08
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| * | | [SERIAL] Remove unnecessary serial.h includeRussell King2006-02-05
| | | | | | | | | | | | | | | | | | | | | | | | imx.c does not use anything from serial.h, so remove it. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
| * | | [SERIAL] uart_port flags member should use UPF_*Russell King2006-02-05
| | | | | | | | | | | | | | | | | | | | | | | | Convert usage of ASYNC_* to UPF_*. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
| * | | [SERIAL] uart_port iotype member should use UPIO_*Russell King2006-02-05
| | | | | | | | | | | | | | | | | | | | | | | | Convert usage of SERIAL_IO_* to UPIO_*. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
* | | | Merge master.kernel.org:/home/rmk/linux-2.6-armLinus Torvalds2006-02-08
|\ \ \ \ | | | | | | | | | | | | | | | Manual conflict merge of arch/arm/Kconfig
| * | | | [ARM] 3278/1: OMAP: 3/3 Fix low-level io init for omap2 boardsTony Lindgren2006-02-08
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Patch from Tony Lindgren This patch fixes the low-level IO init for omap2 boards. Signed-off-by: Tony Lindgren <tony@atomide.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
| * | | | [ARM] 3280/1: OMAP: 2/3 Fix low-level io init for omap1 boardsTony Lindgren2006-02-08
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Patch from Tony Lindgren This patch fixes the low-level IO init for omap1 boards. Signed-off-by: Tony Lindgren <tony@atomide.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
| * | | | [ARM] 3279/1: OMAP: 1/3 Fix low-level io initTony Lindgren2006-02-08
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Patch from Tony Lindgren This patch adds the missing cache flushes to common low-level init that are needed to access the IO region. These flushes are normally done at the end of devicemaps_init(), but we need to detect the OMAP core type early. Signed-off-by: Tony Lindgren <tony@atomide.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
| * | | | [ARM] 3299/1: S3C24XX - fix irq range on adc deviceBen Dooks2006-02-08
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Patch from Ben Dooks Change the IRQ resource range for the ADC device to be two distinct IRQs Signed-off-by: Ben Dooks <ben-linux@fluff.org> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
| * | | | [ARM] 3313/1: Use OSC4 instead of OSC1 for CLCDCatalin Marinas2006-02-08
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Patch from Catalin Marinas Because of a type, OSC1 was used for setting the display clock instead of OSC4. This patch fixes it. Signed-off-by: Catalin Marinas <catalin.marinas@arm.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
| * | | | [ARM] 3310/1: add a comment about the possible __kuser_cmpxchg transient falseNicolas Pitre2006-02-08
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | negative Patch from Nicolas Pitre The pre ARMv5 implementation can be aborted if an exception occurs in the middle of it. Because of that, the ARMv6 implementation doesn't re-attempt the operation on a failed strex either. Let's make this transient nature of such a false positive more explicit in the definition. Signed-off-by: Nicolas Pitre <nico@cam.org> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
| * | | | [ARM] 3309/1: disable the pre-ARMv5 NPTL kernel helper in the non MMU caseNicolas Pitre2006-02-08
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Patch from Nicolas Pitre The cmpxchg emulation on pre-ARMv5 relies on user code executed from a kernel address. If the operation cannot complete atomically, it is aborted from the usr_entry macro by clearing the Z flag. This clearing of the Z flag is done whenever the user pc is above TASK_SIZE. However this "pc >= TASK_SIZE" test cannot work in the non MMU case. Worse: the current code will corrupt the Z flag on every entry to the kernel. Let's disable it in the non MMU case for now. Using NPTL on non MMU targets needs to be worked out anyway. Signed-off-by: Nicolas Pitre <nico@cam.org> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
| * | | | [ARM] 3308/1: old ABI compat: struct sockaddr_unNicolas Pitre2006-02-08
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Patch from Nicolas Pitre struct sockaddr_un loses its padding with EABI. Since the size of the structure is used as a validation test in unix_mkname(), we need to change the length argument to 110 whenever it is 112. Signed-off-by: Nicolas Pitre <nico@cam.org> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
| * | | | [ARM] Experimental config options should have (EXPERIMENTAL)Russell King2006-02-08
| | | | | | | | | | | | | | | | | | | | Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
generated by cgit v1.2.2 (git 2.25.0) at 2024-11-20 13:08:05 -0500