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2010-08-05memblock: Add memblock_find_in_range()Yinghai Lu2-0/+10
This is a wrapper for memblock_find_base() using slightly different arguments (start,end instead of start,size for example) in order to make it easier to convert existing arch/x86 code. Signed-off-by: Yinghai Lu <yinghai@kernel.org> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2010-08-05memblock: Option for the architecture to put memblock into the .init sectionYinghai Lu2-24/+32
Arch code can define ARCH_DISCARD_MEMBLOCK in asm/memblock.h, which in turns causes memblock code and data to go respectively into the .init and .initdata sections. This will be used by the x86 architecture. If ARCH_DISCARD_MEMBLOCK is defined, the debugfs files to inspect the memblock arrays after boot are not created. Signed-off-by: Yinghai Lu <yinghai@kernel.org> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2010-08-05memblock: Protect memblock.h with CONFIG_HAVE_MEMBLOCKYinghai Lu1-0/+3
This should make it easier to catch/debug incorrect use when the CONFIG_ option isn't set. Signed-off-by: Yinghai Lu <yinghai@kernel.org> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2010-08-05memblock: Make MEMBLOCK_ERROR be 0Benjamin Herrenschmidt2-1/+7
And ensure we don't hand out 0 as a valid allocation. We put the low limit at PAGE_SIZE arbitrarily. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2010-08-05memblock: Export MEMBLOCK_ERRORYinghai Lu2-3/+2
will used by x86 memblock_x86_find_in_range_node and nobootmem replacement Signed-off-by: Yinghai Lu <yinghai@kernel.org> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2010-08-05memblock: Improve debug output when resizing the reserve arrayYinghai Lu1-3/+4
Print out the location info in addition to which array is being resized. Also use memblocK_dbg() to put that under control of the memblock_debug flag. Signed-off-by: Yinghai Lu <yinghai@kernel.org> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2010-08-05memblock: Expose some memblock bits for use by x86Yinghai Lu2-1/+7
This exposes memblock_debug and associated memblock_dbg() macro, along with memblock_can_resize so that x86 can use these when ported to use memblock Signed-off-by: Yinghai Lu <yinghai@kernel.org> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2010-08-05memblock: Add debugfs files to dump the arrays contentBenjamin Herrenschmidt1-0/+51
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2010-08-05memblock: Make memblock_alloc_try_nid() fallback to MEMBLOCK_ALLOC_ANYWHEREBenjamin Herrenschmidt1-1/+1
memblock_alloc_nid() used to fallback to allocating anywhere by using memblock_alloc() as a fallback. However, some of my previous patches limit memblock_alloc() to the region covered by MEMBLOCK_ALLOC_ACCESSIBLE which is not quite what we want for memblock_alloc_try_nid(). So we fix it by explicitely using MEMBLOCK_ALLOC_ANYWHERE. Not that so far only sparc uses memblock_alloc_nid() and it hasn't been updated to clamp the accessible zone yet. Thus the temporary "breakage" should have no effect. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2010-08-05memblock: Separate memblock_alloc_nid() and memblock_alloc_try_nid()Benjamin Herrenschmidt3-3/+21
The former is now strict, it will fail if it cannot honor the allocation within the node, while the later implements the previous semantic which falls back to allocating anywhere. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2010-08-05memblock: NUMA allocate can now use early_pfn_mapBenjamin Herrenschmidt2-1/+30
We now provide a default (weak) implementation of memblock_nid_range() which uses the early_pfn_map[] if CONFIG_ARCH_POPULATES_NODE_MAP is set. Sparc still needs to use its own method due to the way the pages can be scattered between nodes. This implementation is inefficient due to our main algorithm and callback construct wanting to work on an ascending addresses bases while early_pfn_map[] would rather work with nid's (it's unsorted at that stage). But it should work and we can look into improving it subsequently, possibly using arch compile options to chose a different algorithm alltogether. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2010-08-05memblock: Add "start" argument to memblock_find_base()Benjamin Herrenschmidt1-11/+16
To constraint the search of a region between two boundaries, which will be used by the new NUMA aware allocator among others. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2010-08-05memblock: Add arch function to control coalescing of memblock memory regionsBenjamin Herrenschmidt2-1/+20
Some archs such as ARM want to avoid coalescing accross things such as the lowmem/highmem boundary or similar. This provides the option to control it via an arch callback for which a weak default is provided which always allows coalescing. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2010-08-05memblock: Add array resizing supportBenjamin Herrenschmidt1-2/+102
When one of the array gets full, we resize it. After much thinking and a few iterations of that code, I went back to on-demand resizing using the (new) internal memblock_find_base() function, which is pretty much what Yinghai initially proposed, though there some differences in the details. To work this relies on the default alloc limit being set sensibly by the architecture. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2010-08-05memblock: Move functions around into a more sensible orderBenjamin Herrenschmidt1-142/+159
Some shuffling is needed for doing array resize so we may as well put some sense into the ordering of the functions in the whole memblock.c file. No code change. Added some comments. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2010-08-05memblock: split memblock_find_base() out of __memblock_alloc_base()Benjamin Herrenschmidt1-20/+38
This will be used by the array resize code and might prove useful to some arch code as well at which point it can be made non-static. Also add comment as to why aligning size is important Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> --- v2. Fix loss of size alignment v3. Fix result code
2010-08-05memblock: Move memblock_init() to the bottom of the fileBenjamin Herrenschmidt1-27/+27
It's a real PITA to have to search for it in the middle Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2010-08-05memblock: Define MEMBLOCK_ERROR internally instead of using ~(phys_addr_t)0Benjamin Herrenschmidt1-5/+7
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2010-08-05memblock: Make memblock_find_region() out of memblock_alloc_region()Benjamin Herrenschmidt1-11/+9
This function will be used to locate a free area to put the new memblock arrays when attempting to resize them. memblock_alloc_region() is gone, the two callsites now call memblock_add_region(). Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> --- v2. Fix membase_alloc_nid_region() conversion
2010-08-05memblock: Add debug markers at the end of the arrayBenjamin Herrenschmidt1-0/+11
Since we allocate one more than needed, why not do a bit of sanity checking here to ensure we don't walk past the end of the array ? Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2010-08-05memblock: Move memblock arrays to static storage in memblock.c and make ↵Benjamin Herrenschmidt2-4/+13
their size a variable This is in preparation for having resizable arrays. Note that we still allocate one more than needed, this is unchanged from the previous implementation. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2010-08-05memblock: Remove memblock_type.size and add memblock.memory_size insteadBenjamin Herrenschmidt3-6/+6
Right now, both the "memory" and "reserved" memblock_type structures have a "size" member. It represents the calculated memory size in the former case and is unused in the latter. This moves it out to the main memblock structure instead Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2010-08-05memblock: Remove unused memblock.debug struct memberBenjamin Herrenschmidt1-3/+4
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2010-08-05memblock: Change u64 to phys_addr_tBenjamin Herrenschmidt2-82/+84
Let's not waste space and cycles on archs that don't support >32-bit physical address space. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2010-08-05memblock: Remove rmo_size, burry it in arch/powerpc where it belongsBenjamin Herrenschmidt16-40/+125
The RMA (RMO is a misnomer) is a concept specific to ppc64 (in fact server ppc64 though I hijack it on embedded ppc64 for similar purposes) and represents the area of memory that can be accessed in real mode (aka with MMU off), or on embedded, from the exception vectors (which is bolted in the TLB) which pretty much boils down to the same thing. We take that out of the generic MEMBLOCK data structure and move it into arch/powerpc where it belongs, renaming it to "RMA" while at it. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2010-08-05memblock: Introduce default allocation limit and use it to replace explicit onesBenjamin Herrenschmidt14-53/+63
This introduce memblock.current_limit which is used to limit allocations from memblock_alloc() or memblock_alloc_base(..., MEMBLOCK_ALLOC_ACCESSIBLE). The old MEMBLOCK_ALLOC_ANYWHERE changes value from 0 to ~(u64)0 and can still be used with memblock_alloc_base() to allocate really anywhere. It is -no-longer- cropped to MEMBLOCK_REAL_LIMIT which disappears. Note to archs: I'm leaving the default limit to MEMBLOCK_ALLOC_ANYWHERE. I strongly recommend that you ensure that you set an appropriate limit during boot in order to guarantee that an memblock_alloc() at any time results in something that is accessible with a simple __va(). The reason is that a subsequent patch will introduce the ability for the array to resize itself by reallocating itself. The MEMBLOCK core will honor the current limit when performing those allocations. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2010-08-05memblock: Expose MEMBLOCK_ALLOC_ANYWHEREBenjamin Herrenschmidt3-3/+2
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2010-08-05memblock: Factor the lowest level alloc functionBenjamin Herrenschmidt1-32/+27
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2010-08-05memblock: Remove nid_range argument, arch provides memblock_nid_range() insteadBenjamin Herrenschmidt3-17/+19
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2010-08-05memblock: Remove memblock_find()Benjamin Herrenschmidt2-33/+0
Nobody uses it anymore. It's semantics were ... weird Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2010-08-05memblock: Remove obsolete accessorsBenjamin Herrenschmidt1-23/+0
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2010-08-05memblock/arm: Use new accessorsBenjamin Herrenschmidt1-9/+12
CC: Russell King <linux@arm.linux.org.uk> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2010-08-04memblock/powerpc: Use new accessorsBenjamin Herrenschmidt3-71/+46
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2010-08-04memblock/sparc: Use new accessorsBenjamin Herrenschmidt1-18/+12
CC: David S. Miller <davem@davemloft.net> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2010-08-04memblock/sh: Use new accessorsBenjamin Herrenschmidt1-8/+9
CC: Paul Mundt <lethal@linux-sh.org> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2010-08-04memblock/microblaze: Use new accessorsBenjamin Herrenschmidt1-11/+9
CC: Michal Simek <monstr@monstr.eu> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2010-08-04memblock: Introduce for_each_memblock() and new accessorsBenjamin Herrenschmidt1-0/+52
Walk memblock's using for_each_memblock() and use memblock_region_base/end_pfn() for getting to PFNs. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2010-08-04memblock/arm: Use memblock_region_is_memory() for omap fbBenjamin Herrenschmidt2-11/+3
Instead of the deprecated memblock_find() Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2010-08-04memblock/arm: pfn_valid uses memblock_is_memory()Benjamin Herrenschmidt1-14/+1
The implementation is pretty much similar. There is a -small- added overhead by having another function call and the address shift. If that becomes a concern, I suppose we could actually have memblock itself expose a memblock_pfn_valid() which then ARM can use directly with an appropriate #define... Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2010-08-04memblock: Implement memblock_is_memory and memblock_is_region_memoryBenjamin Herrenschmidt2-8/+36
To make it fast, we steal ARM's binary search for memblock_is_memory() and we use that to also the replace existing implementation of memblock_is_reserved(). Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2010-08-04memblock: No reason to include asm/memblock.h lateBenjamin Herrenschmidt1-2/+2
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2010-08-04memblock: Rename memblock_region to memblock_type and memblock_property to ↵Benjamin Herrenschmidt10-120/+118
memblock_region Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2010-08-04memblock: Fix memblock_is_region_reserved() to return a booleanBenjamin Herrenschmidt1-1/+1
All callers expect a boolean result which is true if the region overlaps a reserved region. However, the implementation actually returns -1 if there is no overlap, and a region index (0 based) if there is. Make it behave as callers (and common sense) expect. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2010-08-04Merge git://git.kernel.org/pub/scm/linux/kernel/git/steve/gfs2-2.6-nmwLinus Torvalds11-88/+169
* git://git.kernel.org/pub/scm/linux/kernel/git/steve/gfs2-2.6-nmw: GFS2: Fix recovery stuck bug (try #2) GFS2: Fix typo in stuffed file data copy handling Revert "GFS2: recovery stuck on transaction lock" GFS2: Make "try" lock not try quite so hard GFS2: remove dependency on __GFP_NOFAIL GFS2: Simplify gfs2_write_alloc_required GFS2: Wait for journal id on mount if not specified on mount command line GFS2: Use nobh_writepage
2010-08-04Merge branch 'linux-next' of git://git.infradead.org/ubi-2.6Linus Torvalds6-74/+198
* 'linux-next' of git://git.infradead.org/ubi-2.6: UBI: do not warn unnecessarily UBI: do not print message about corruptes PEBs if we have none of them UBI: improve delete-compatible volumes handling UBI: fix error message and compilation warnings UBI: generate random image_seq when formatting MTD devices UBI: improve ECC error message UBI: improve corrupted flash handling UBI: introduce eraseblock counter variables UBI: introduce a new IO return code UBI: simplify IO error codes
2010-08-04Merge branch 'linux-next' of git://git.infradead.org/ubifs-2.6Linus Torvalds4-14/+29
* 'linux-next' of git://git.infradead.org/ubifs-2.6: UBIFS: fix a memory leak on error path. UBIFS: fix GC LEB recovery UBIFS: use ERR_CAST UBIFS: check return code
2010-08-04Merge branch 'for-linus' of ↵Linus Torvalds18-123/+1845
git://git.kernel.org/pub/scm/linux/kernel/git/ericvh/v9fs * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ericvh/v9fs: (22 commits) 9p: fix sparse warnings in new xattr code fs/9p: remove sparse warning in vfs_inode fs/9p: destroy fid on failed remove fs/9p: Prevent parallel rename when doing fid_lookup fs/9p: Add support user. xattr net/9p: Implement TXATTRCREATE 9p call net/9p: Implement attrwalk 9p call 9p: Implement LOPEN fs/9p: This patch implements TLCREATE for 9p2000.L protocol. 9p: Implement TMKDIR 9p: Implement TMKNOD 9p: Define and implement TSYMLINK for 9P2000.L 9p: Define and implement TLINK for 9P2000.L 9p: Define and implement TLINK for 9P2000.L 9p: Implement client side of setattr for 9P2000.L protocol. 9p: getattr client implementation for 9P2000.L protocol. fs/9p: Pass the correct user credentials during attach net/9p: Handle the server returned error properly 9p: readdir implementation for 9p2000.L 9p: Make use of iounit for read/write ...
2010-08-04Merge branch 'for-linus' of git://oss.sgi.com/xfs/xfsLinus Torvalds91-4018/+1621
* 'for-linus' of git://oss.sgi.com/xfs/xfs: (49 commits) xfs simplify and speed up direct I/O completions xfs: move aio completion after unwritten extent conversion direct-io: move aio_complete into ->end_io xfs: fix big endian build xfs: clean up xfs_bmap_get_bp xfs: simplify xfs_truncate_file xfs: kill the b_strat callback in xfs_buf xfs: remove obsolete osyncisosync mount option xfs: clean up filestreams helpers xfs: fix gcc 4.6 set but not read and unused statement warnings xfs: Fix build when CONFIG_XFS_POSIX_ACL=n xfs: fix unsigned underflow in xfs_free_eofblocks xfs: use GFP_NOFS for page cache allocation xfs: fix memory reclaim recursion deadlock on locked inode buffer xfs: fix xfs_trans_add_item() lockdep warnings xfs: simplify and remove xfs_ireclaim xfs: don't block on buffer read errors xfs: move inode shrinker unregister even earlier xfs: remove a dmapi leftover xfs: writepage always has buffers ...
2010-08-04Merge git://git.kernel.org/pub/scm/linux/kernel/git/sfrench/cifs-2.6Linus Torvalds21-116/+1006
* git://git.kernel.org/pub/scm/linux/kernel/git/sfrench/cifs-2.6: (29 commits) cifs: fsc should not default to "on" [CIFS] remove redundant path walking in dfs_do_refmount cifs: ignore the "mand", "nomand" and "_netdev" mount options cifs: map NT_STATUS_ERROR_WRITE_PROTECTED to -EROFS cifs: don't allow cifs_iget to match inodes of the wrong type [CIFS] relinquish fscache cookie before freeing CIFSTconInfo cifs: add separate cred_uid field to sesInfo fs: cifs: check kmalloc() result [CIFS] Missing ifdef [CIFS] Missing line from previous commit [CIFS] Fix build break when CONFIG_CIFS_FSCACHE disabled cifs: add mount option to enable local caching cifs: read pages from FS-Cache cifs: store pages into local cache cifs: FS-Cache page management cifs: define inode-level cache object and register them cifs: define superblock-level cache index objects and register them cifs: remove unused cifsUidInfo struct cifs: clean up cifs_find_smb_ses (try #2) cifs: match secType when searching for existing tcp session ...
2010-08-04Merge branch 'devel' of master.kernel.org:/home/rmk/linux-2.6-armLinus Torvalds512-6552/+18499
* 'devel' of master.kernel.org:/home/rmk/linux-2.6-arm: (291 commits) ARM: AMBA: Add pclk support to AMBA bus infrastructure ARM: 6278/2: fix regression in RealView after the introduction of pclk ARM: 6277/1: mach-shmobile: Allow users to select HZ, default to 128 ARM: 6276/1: mach-shmobile: remove duplicate NR_IRQS_LEGACY ARM: 6246/1: mmci: support larger MMCIDATALENGTH register ARM: 6245/1: mmci: enable hardware flow control on Ux500 variants ARM: 6244/1: mmci: add variant data and default MCICLOCK support ARM: 6243/1: mmci: pass power_mode to the translate_vdd callback ARM: 6274/1: add global control registers definition header file for nuc900 mx2_camera: fix type of dma buffer virtual address pointer mx2_camera: Add soc_camera support for i.MX25/i.MX27 arm/imx/gpio: add spinlock protection ARM: Add support for the LPC32XX arch ARM: LPC32XX: Arch config menu supoport and makefiles ARM: LPC32XX: Phytec 3250 platform support ARM: LPC32XX: Misc support functions ARM: LPC32XX: Serial support code ARM: LPC32XX: System suspend support ARM: LPC32XX: GPIO, timer, and IRQ drivers ARM: LPC32XX: Clock driver ...
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