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2008-04-21Merge branch 'for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/x86/linux-2.6-x86 * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/x86/linux-2.6-x86: (77 commits) x86: UV startup of slave cpus x86: integrate pci-dma.c x86: don't do dma if mask is NULL. x86: return conditional to mmu x86: remove kludge from x86_64 x86: unify gfp masks x86: retry allocation if failed x86: don't try to allocate from DMA zone at first x86: use a fallback dev for i386 x86: use numa allocation function in i386 x86: remove virt_to_bus in pci-dma_64.c x86: adjust dma_free_coherent for i386 x86: move bad_dma_address x86: isolate coherent mapping functions x86: move dma_coherent functions to pci-dma.c x86: merge iommu initialization parameters x86: merge dma_supported x86: move pci fixup to pci-dma.c x86: move x86_64-specific to common code. x86: move initialization functions to pci-dma.c ...
2008-04-21Merge branch 'ro-bind.b6' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs-2.6 * 'ro-bind.b6' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs-2.6: (24 commits) [PATCH] r/o bind mounts: debugging for missed calls [PATCH] r/o bind mounts: honor mount writer counts at remount [PATCH] r/o bind mounts: track numbers of writers to mounts [PATCH] r/o bind mounts: check mnt instead of superblock directly [PATCH] r/o bind mounts: elevate count for xfs timestamp updates [PATCH] r/o bind mounts: make access() use new r/o helper [PATCH] r/o bind mounts: write counts for truncate() [PATCH] r/o bind mounts: elevate write count for chmod/chown callers [PATCH] r/o bind mounts: elevate write count for open()s [PATCH] r/o bind mounts: elevate write count for ioctls() [PATCH] r/o bind mounts: write count for file_update_time() [PATCH] r/o bind mounts: elevate write count for do_utimes() [PATCH] r/o bind mounts: write counts for touch_atime() [PATCH] r/o bind mounts: elevate write count for ncp_ioctl() [PATCH] r/o bind mounts: elevate write count for xattr_permission() callers [PATCH] r/o bind mounts: get write access for vfs_rename() callers [PATCH] r/o bind mounts: write counts for link/symlink [PATCH] r/o bind mounts: get callers of vfs_mknod/create/mkdir() [PATCH] r/o bind mounts: elevate write count for rmdir and unlink. [PATCH] r/o bind mounts: drop write during emergency remount ...
2008-04-21Merge git://git.kernel.org/pub/scm/linux/kernel/git/lethal/sh-2.6Linus Torvalds
* git://git.kernel.org/pub/scm/linux/kernel/git/lethal/sh-2.6: (27 commits) sh: Fix up L2 cache probe. sh: Fix up SH-4A part probe. sh: Add support for SH7723 CPU subtype. sh: Fix up SH7763 build. sh: Add migor_ts support to MigoR sh: Add rs5c732b RTC support to MigoR sh: Add I2C support to MigoR sh: Add I2C platform data to sh7722 sh: MigoR NAND flash support using gen_flash sh: MigoR NOR flash support using physmap-flash sh: Fix up mach-types formatting from merge damage. sh: r7780rp: Hook up the I2C and SMBus platform devices. sh: Use phyical addresses for MigoR smc91x resources sh: Use physical addresses for sh7722 USBF resources sh: Add MigoR header file Fix sh_keysc double free sh: Fix up __access_ok() check for nommu. sh: Allow optimized clear/copy page routines to be used on SH-2. sh: Hook up the rest of the SH7770 serial ports. sh: Add support for Solution Engine SH7721 board ...
2008-04-21Fix RCU list iterator use of 'rcu_dereference()'Linus Torvalds
The RCU iterators used 'rcu_dereference()' on an already-fetched RCU pointer value, which defeats the whole point of the exercise. When we dereference a pointer protected by RCU, we need to make sure that we only fetch the value _once_, because if the compiler ends up re-loading it due to register pressure, the newly reloaded value could be different from the previously fetched one, and you get inconsistent results. Cleaned-up, fixed, and the pointless list_for_each_safe_rcu #define deleted by Paul Kenney. Acked-by: Herbert Xu <herbert@gondor.apana.org.au> Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-04-19x86: UV startup of slave cpusJack Steiner
This patch changes smpboot.c so that it can start slave cpus running in UV non-unique apicid mode. The SIPI must be sent using a UV-specific mechanism. Signed-off-by: Jack Steiner <steiner@sgi.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-04-19x86: integrate pci-dma.cGlauber Costa
The code in pci-dma_{32,64}.c are now sufficiently close to each other. We merge them in pci-dma.c. Signed-off-by: Glauber Costa <gcosta@redhat.com> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-04-19x86: don't do dma if mask is NULL.Glauber Costa
if the device hasn't provided a mask, abort allocation. Note that we're using a fallback device now, so it does not cover the case of a NULL device: just drivers passing NULL masks around. Signed-off-by: Glauber Costa <gcosta@redhat.com> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-04-19x86: return conditional to mmuGlauber Costa
Just return our allocation if we don't have an mmu. For i386, where this patch is being applied, we never have. So our goal is just to have the code to look like x86_64's. Signed-off-by: Glauber Costa <gcosta@redhat.com> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-04-19x86: remove kludge from x86_64Glauber Costa
The claim is that i386 does it. Just it does not. So remove it. Signed-off-by: Glauber Costa <gcosta@redhat.com> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-04-19x86: unify gfp masksGlauber Costa
Use the same gfp masks for x86_64 and i386. It involves using HIGHMEM or DMA32 where necessary, for the sake of code compatibility, (no real effect), and using the NORETRY mask for i386. Signed-off-by: Glauber Costa <gcosta@redhat.com> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-04-19x86: retry allocation if failedGlauber Costa
This patch puts in the code to retry allocation in case it fails. By its own, it does not make much sense but making the code look like x86_64. But later patches in this series will make we try to allocate from zones other than DMA first, which will possibly fail. Signed-off-by: Glauber Costa <gcosta@redhat.com> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-04-19x86: don't try to allocate from DMA zone at firstGlauber Costa
If we fail, we'll loop into the allocation again, and then allocate in the DMA zone. Signed-off-by: Glauber Costa <gcosta@redhat.com> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-04-19x86: use a fallback dev for i386Glauber Costa
We can use a fallback dev for cases of a NULL device being passed (mostly ISA) This comes from x86_64 implementation. Signed-off-by: Glauber Costa <gcosta@redhat.com> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-04-19x86: use numa allocation function in i386Glauber Costa
We can do it here to, in the same way x86_64 does. Signed-off-by: Glauber Costa <gcosta@redhat.com> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-04-19x86: remove virt_to_bus in pci-dma_64.cGlauber Costa
virt_to_bus() is deprecated according to the docs, and moreover, won't return the right thing in i386 if we're dealing with high memory mappings. So we make our allocation function return a page, and then use page_address() (for virtual addr) and page_to_phys() (for physical addr) instead. Signed-off-by: Glauber Costa <gcosta@redhat.com> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-04-19x86: adjust dma_free_coherent for i386Glauber Costa
We call unmap_single, if available. Signed-off-by: Glauber Costa <gcosta@redhat.com> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-04-19x86: move bad_dma_addressGlauber Costa
It goes to pci-dma.c, and is removed from the arch-specific files. Signed-off-by: Glauber Costa <gcosta@redhat.com> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-04-19x86: isolate coherent mapping functionsGlauber Costa
i386 implements the declare coherent memory API, and x86_64 does not it is reflected in pieces of dma_alloc_coherent and dma_free_coherent. Those pieces are isolated in separate functions, that are declared as empty macros in x86_64. This way we can make the code the same. Signed-off-by: Glauber Costa <gcosta@redhat.com> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-04-19x86: move dma_coherent functions to pci-dma.cGlauber Costa
They are placed in an ifdef, since they are i386 specific the structure definition goes to dma-mapping.h. Signed-off-by: Glauber Costa <gcosta@redhat.com> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-04-19x86: merge iommu initialization parametersGlauber Costa
we merge the iommu initialization parameters in pci-dma.c Nice thing, that both architectures at least recognize the same parameters. usedac i386 parameter is marked for deprecation Signed-off-by: Glauber Costa <gcosta@redhat.com> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-04-19x86: merge dma_supportedGlauber Costa
The code for both arches are very similar, so this patch merge them. Signed-off-by: Glauber Costa <gcosta@redhat.com> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-04-19x86: move pci fixup to pci-dma.cGlauber Costa
via_no_dac provides a fixup that is the same for both architectures. Move it to pci-dma.c. Signed-off-by: Glauber Costa <gcosta@redhat.com> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-04-19x86: move x86_64-specific to common code.Glauber Costa
This patch moves the bootmem functions, that are largely x86_64-specific into pci-dma.c. The code goes inside an ifdef. Signed-off-by: Glauber Costa <gcosta@redhat.com> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-04-19x86: move initialization functions to pci-dma.cGlauber Costa
initcalls that triggers the various possibiities for dma subsys are moved to pci-dma.c. Signed-off-by: Glauber Costa <gcosta@redhat.com> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-04-19x86: unify pci-nommuGlauber Costa
merge pci-base_32.c and pci-nommu_64.c into pci-nommu.c Their code were made the same, so now they can be merged. Signed-off-by: Glauber Costa <gcosta@redhat.com> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-04-19x86: move definition to pci-dma.cGlauber Costa
Move dma_ops structure definition to pci-dma.c, where it belongs. Signed-off-by: Glauber Costa <gcosta@redhat.com> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-04-19x86: use dma_length in i386Glauber Costa
This is done to get the code closer to x86_64. Signed-off-by: Glauber Costa <gcosta@redhat.com> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-04-19x86: use WARN_ON in mapping functionsGlauber Costa
In the very same way i386 do, we use WARN_ON functions in map_simple and map_sg. Signed-off-by: Glauber Costa <gcosta@redhat.com> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-04-19x86: use sg_phys in x86_64Glauber Costa
To make the code usable in i386, where we have high memory mappings, we drop te virt_to_bus(sg_virt()) construction in favour of sg_phys. Signed-off-by: Glauber Costa <gcosta@redhat.com> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-04-19x86: Add flush_write_buffers in nommu functionsGlauber Costa
This patch adds flush_write_buffers() in some functions of pci-nommu_64.c They are added anywhere i386 would also have it. This is not a problem for x86_64, since flush_rite_buffers() an nop for it. Signed-off-by: Glauber Costa <gcosta@redhat.com> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-04-19x86: implement mapping_error in pci-nommu_64.cGlauber Costa
This patch implements mapping_error for pci-nommu_64.c. It takes care to keep the same compatible behaviour it already had. Although this file is not (yet) used for i386, we introduce the i386 version here. Again, care is taken, even at the expense of an ifdef, to keep the same behaviour inconditionally. Signed-off-by: Glauber Costa <gcosta@redhat.com> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-04-19x86: delete empty functions from pci-nommu_64.cGlauber Costa
This functions are now called conditionally on their existence in the struct. So just delete them, instead of keeping an empty implementation. Signed-off-by: Glauber Costa <gcosta@redhat.com> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-04-19x86: introduce pci-dma.cGlauber Costa
This patch introduces pci-dma.c, a common file for pci dma between i386 and x86_64. As a start, dma_set_mask() is the same between architectures, and is placed there. Signed-off-by: Glauber Costa <gcosta@redhat.com> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-04-19x86: move dma_supported and dma_set_mask to pci-dma_32.c, fixMark McLoughlin
ERROR: "dma_supported" [drivers/ssb/ssb.ko] undefined! ERROR: "dma_set_mask" [drivers/scsi/qla2xxx/qla2xxx.ko] undefined! ERROR: "dma_set_mask" [drivers/scsi/aic7xxx/aic7xxx.ko] undefined! ERROR: "dma_set_mask" [drivers/scsi/aic7xxx/aic79xx.ko] undefined! ERROR: "dma_supported" [drivers/net/pcnet32.ko] undefined! ERROR: "dma_supported" [drivers/media/video/saa7134/saa7134.ko] undefined! ERROR: "dma_set_mask" [drivers/media/video/meye.ko] undefined! ERROR: "dma_supported" [drivers/media/video/cx88/cx8802.ko] undefined! ERROR: "dma_supported" [drivers/media/video/cx88/cx8800.ko] undefined! ERROR: "dma_supported" [drivers/media/video/cx88/cx88-alsa.ko] undefined! ERROR: "dma_supported" [drivers/media/video/cx23885/cx23885.ko] undefined! They just need to be exported like on x86_64. dma_supported() and dma_set_mask() were previously inlined, but are now moved to pci-dma_32.c. Since they're used by various drivers, they need to be exported. Signed-off-by: Mark McLoughlin <markmc@redhat.com> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-04-19x86: delete the arch-specific dma-mapping headers.Glauber Costa
all the code that is left is ready to be merged as-is in dma-mapping.h. Signed-off-by: Glauber Costa <gcosta@redhat.com> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-04-19x86: move ARCH_HAS_DMA_DECLARE_COHERENT_MEMORY to dma-mapping.hGlauber Costa
define it conditionally to i386. Signed-off-by: Glauber Costa <gcosta@redhat.com> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-04-19x86: unify dma_mapping_errorGlauber Costa
We provide a map_error function in pci-base_32.c to make sure i386 keeps with the same behaviour it used to. Signed-off-by: Glauber Costa <gcosta@redhat.com> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-04-19x86: provide a bad_dma_address symbol for i386Glauber Costa
It's initially 0, since we don't expect any DMA there. Signed-off-by: Glauber Costa <gcosta@redhat.com> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-04-19x86: align to clflush sizeGlauber Costa
Do it instead of using the conservative approach we're currently doing. This is the way x86_64 does, and this patch makes this piece of code the same between them, ready to be integrated. Signed-off-by: Glauber Costa <gcosta@redhat.com> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-04-19x86: move dma_supported and dma_set_mask to pci-dma_32.cGlauber Costa
This is the way x86_64 does, so this make them equal. They have to be extern now in the header, and the extern definition is moved to the common dma-mapping.h header. Signed-off-by: Glauber Costa <gcosta@redhat.com> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-04-19x86: move dma_cache_sync to common headerGlauber Costa
they are the same in both architectures. Signed-off-by: Glauber Costa <gcosta@redhat.com> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-04-19x86: dma-ops on highmem fixIngo Molnar
Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-04-19x86: move dma_map_page and dma_unmap_page to common headerGlauber Costa
They are similar enough to do this move. the macro version is ugly, and we use inline functions instead. Signed-off-by: Glauber Costa <gcosta@redhat.com> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-04-19x86: move alloc and free coherent to common headerGlauber Costa
they are the same between architectures. (except for the fact that x86_64 has duplicate code) move them to dma-mapping.h Signed-off-by: Glauber Costa <gcosta@redhat.com> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-04-19x86: move dma_sync_sg_for_device to common headerGlauber Costa
i386 gets an empty function. Signed-off-by: Glauber Costa <gcosta@redhat.com> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-04-19x86: move dma_sync_sg_for_cpu to common headerGlauber Costa
i386 gets an empty function. Signed-off-by: Glauber Costa <gcosta@redhat.com> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-04-19x86: move dma_sync_single_range_for_device to common headerGlauber Costa
i386 gets an empty function. Signed-off-by: Glauber Costa <gcosta@redhat.com> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-04-19x86: move dma_sync_single_range_for_cpu to common headerGlauber Costa
i386 gets an empty function. Signed-off-by: Glauber Costa <gcosta@redhat.com> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-04-19x86: move dma_sync_single_for_device to common headerGlauber Costa
i386 gets an empty function. Signed-off-by: Glauber Costa <gcosta@redhat.com> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-04-19x86: move dma_sync_single_for_cpu to common headerGlauber Costa
i386 gets an empty function. Signed-off-by: Glauber Costa <gcosta@redhat.com> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
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