user/sven/linux.git/lib, branch v2.6.31.2

lmb: Remove __init from lmb_end_of_DRAM()

2009-08-27T19:25:26Z

We call lmb_end_of_DRAM() to test whether a DMA mask is ok on a machine without IOMMU, but this function is marked as __init. I don't think there's a clean way to get the top of RAM max_pfn doesn't appear to include highmem or I missed (or we have a bug :-) so for now, let's just avoid having a broken 2.6.31 by making this function non-__init and we can revisit later. Signed-off-by: Benjamin Herrenschmidt Signed-off-by: Linus Torvalds

flex_array: convert element_nr formals to unsigned

2009-08-27T03:06:52Z

It's problematic to allow signed element_nr's or total's to be passed as part of the flex array API. flex_array_alloc() allows total_nr_elements to be set to a negative quantity, which is obviously erroneous. flex_array_get() and flex_array_put() allows negative array indices in dereferencing an array part, which could address memory mapped before struct flex_array. The fix is to convert all existing element_nr formals to be qualified as unsigned. Existing checks to compare it to total_nr_elements or the max array size based on element_size need not be changed. Signed-off-by: David Rientjes Cc: Dave Hansen Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

flex_array: fix flex_array_free_parts comment

2009-08-27T03:06:52Z

flex_array_free_parts() does not take `src' or `element_nr' formals, so remove their respective comments. Signed-off-by: David Rientjes Acked-by: Dave Hansen Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

flex_array: fix get function for elements in base starting at non-zero

2009-08-27T03:06:52Z

If all array elements fit into the base structure and data is copied using flex_array_put() starting at a non-zero index, flex_array_get() will fail to return the data. This fixes the bug by only checking for NULL parts when all elements do not fit in the base structure when flex_array_get() is used. Otherwise, fa_element_to_part_nr() will always be 0 since there are no parts structures needed and such element may never have been put. Thus, it will remain NULL due to the kzalloc() of the base. Additionally, flex_array_put() now only checks for a NULL part when all elements do not fit in the base structure. This is otherwise unnecessary since the base structure is guaranteed to exist (or we would have already hit a NULL pointer). Signed-off-by: David Rientjes Acked-by: Dave Hansen Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

Merge branch 'core-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip

2009-08-25T18:24:24Z

* 'core-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: dma-debug: Fix check_unmap null pointer dereference

Make bitmask 'and' operators return a result code

2009-08-21T16:26:15Z

When 'and'ing two bitmasks (where 'andnot' is a variation on it), some cases want to know whether the result is the empty set or not. In particular, the TLB IPI sending code wants to do cpumask operations and determine if there are any CPU's left in the final set. So this just makes the bitmask (and cpumask) functions return a boolean for whether the result has any bits set. Cc: stable@kernel.org (2.6.30, needed by TLB shootdown fix) Signed-off-by: Linus Torvalds

dma-debug: Fix check_unmap null pointer dereference

2009-08-21T08:04:24Z

While it's debatable whether or not a NULL device argument to the DMA API functions is valid... since it certainly isn't valid on devices with an IOMMU... dma-debug really shouldn't be dereferencing null pointers either. Guard against that in err_printk and the driver_filter functions. A Fedora rawhide user was seeing this in one of the dvb drivers resulting in an oops on boot. [ A patch has been sent for testing to the driver, but I feel the dma debugging support should be fixed as well. (There's still a pile of legacy garbage in the kernel passing null pointers to dma_{alloc,free}_*. :( ] Signed-off-by: Kyle McMartin Cc: mchehab@infradead.org Cc: Joerg Roedel LKML-Reference: <20090820011708.GP25206@bombadil.infradead.org> Signed-off-by: Ingo Molnar

lib/decompress_*: only include if STATIC is not defined

2009-08-07T17:39:56Z

These includes were added by 079effb6933f34b9b1b67b08bd4fd7fb672d16ef ("kmemtrace, kbuild: fix slab.h dependency problem in lib/decompress_inflate.c") to fix the build when using kmemtrace. However this is not necessary when used to create a compressed kernel, and actually creates issues (brings a lot of things unavailable in the decompression environment), so don't include it if STATIC is defined. Signed-off-by: Albin Tonnerre Cc: Sam Ravnborg Cc: Russell King Cc: Ingo Molnar Cc: Thomas Gleixner Cc: "H. Peter Anvin" Cc: Pekka Enberg Cc: Eduard - Gabriel Munteanu Cc: Phillip Lougher Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

bzip2/lzma: remove nasty uncompressed size hack in pre-boot environment

2009-08-07T17:39:56Z

decompress_bunzip2 and decompress_unlzma have a nasty hack that subtracts 4 from the input length if being called in the pre-boot environment. This is a nasty hack because it relies on the fact that flush = NULL only when called from the pre-boot environment (i.e. arch/x86/boot/compressed/misc.c). initramfs.c/do_mounts_rd.c pass in a flush buffer (flush != NULL). This hack prevents the decompressors from being used with flush = NULL by other callers unless knowledge of the hack is propagated to them. This patch removes the hack by making decompress (called only from the pre-boot environment) a wrapper function that subtracts 4 from the input length before calling the decompressor. Signed-off-by: Phillip Lougher Cc: "H. Peter Anvin" Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

bzip2/lzma/gzip: fix comments describing decompressor API

2009-08-07T17:39:56Z

Fix and improve comments in decompress/generic.h that describe the decompressor API. Also remove an unused definition, and rename INBUF_LEN in lib/decompress_inflate.c to conform to bzip2/lzma naming. Signed-off-by: Phillip Lougher Cc: "H. Peter Anvin" Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds