linux/lib/Makefile, branch v3.11

lib: add lz4 compressor module

2013-07-09T17:33:30Z

This patchset is for supporting LZ4 compression and the crypto API using it. As shown below, the size of data is a little bit bigger but compressing speed is faster under the enabled unaligned memory access. We can use lz4 de/compression through crypto API as well. Also, It will be useful for another potential user of lz4 compression. lz4 Compression Benchmark: Compiler: ARM gcc 4.6.4 ARMv7, 1 GHz based board Kernel: linux 3.4 Uncompressed data Size: 101 MB Compressed Size compression Speed LZO 72.1MB 32.1MB/s, 33.0MB/s(UA) LZ4 75.1MB 30.4MB/s, 35.9MB/s(UA) LZ4HC 59.8MB 2.4MB/s, 2.5MB/s(UA) - UA: Unaligned memory Access support - Latest patch set for LZO applied This patch: Add support for LZ4 compression in the Linux Kernel. LZ4 Compression APIs for kernel are based on LZ4 implementation by Yann Collet and were changed for kernel coding style. LZ4 homepage : http://fastcompression.blogspot.com/p/lz4.html LZ4 source repository : http://code.google.com/p/lz4/ svn revision : r90 Two APIs are added: lz4_compress() support basic lz4 compression whereas lz4hc_compress() support high compression or CPU performance get lower but compression ratio get higher. Also, we require the pre-allocated working memory with the defined size and destination buffer must be allocated with the size of lz4_compressbound. [akpm@linux-foundation.org: make lz4_compresshcctx() static] Signed-off-by: Chanho Min Cc: "Darrick J. Wong" Cc: Bob Pearson Cc: Richard Weinberger Cc: Herbert Xu Cc: Yann Collet Cc: Kyungsik Lee Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

lib: add support for LZ4-compressed kernel

2013-07-09T17:33:30Z

Add support for extracting LZ4-compressed kernel images, as well as LZ4-compressed ramdisk images in the kernel boot process. Signed-off-by: Kyungsik Lee Cc: "H. Peter Anvin" Cc: Ingo Molnar Cc: Thomas Gleixner Cc: Russell King Cc: Borislav Petkov Cc: Florian Fainelli Cc: Yann Collet Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

lib: add weak clz/ctz functions

2013-07-09T17:33:30Z

Some architectures need __c[lt]z[sd]i2() for __builtin_c[lt]z[ll] and that causes a build failure. They can be implemented using the fls()/__ffs() and overridden by linking arch-specific versions may not be implemented yet. This is required by "lib: add lz4 compressor module". Reference: https://lkml.org/lkml/2013/4/18/603 Signed-off-by: Chanho Min Reported-by: Geert Uytterhoeven Cc: "Darrick J. Wong" Cc: Bob Pearson Cc: Richard Weinberger Cc: Herbert Xu Cc: Yann Collet Cc: Kyungsik Lee Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

Merge branch 'exotic-arch-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/geert/linux-m68k

2013-07-03T18:12:08Z

Pull "exotic" arch fixes from Geert Uytterhoeven: "This is a collection of several exotic architecture fixes, and a few other fixes for issues that were detected while doing the former" * 'exotic-arch-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/geert/linux-m68k: (35 commits) lib: Move fonts from drivers/video/console/ to lib/fonts/ console/font: Refactor font support code selection logic Revert "staging/solo6x10: depend on CONFIG_FONTS" input: cros_ec_keyb_clear_keyboard() depends on CONFIG_PM_SLEEP score: Wire up asm-generic/xor.h score: Remove unneeded openrisc: Wire up asm-generic/xor.h h8300/boot: Use POSIX "$((..))" instead of bashism "$[...]" h8300: Mark H83002 and H83048 CPU support broken h8300: Switch h8300 to drivers/Kconfig h8300: Limit timer channel ranges in Kconfig h8300: Wire up asm-generic/xor.h h8300: Fill the system call table using a CALL() macro h8300: Fix h8300: Hardcode symbol prefixes in asm sources h8300: add missing definition for read_barries_depends() frv: head.S - Remove commented-out initialization code cris: Wire up asm-generic/vga.h parport: disable PC-style parallel port support on cris console: Disable VGA text console support on cris ...

Merge branch 'for-3.11' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/percpu

2013-07-03T02:52:14Z

Pull per-cpu changes from Tejun Heo: "This pull request contains Kent's per-cpu reference counter. It has gone through several iterations since the last time and the dynamic allocation is gone. The usual usage is relatively straight-forward although async kill confirm interface, which is not used int most cases, is somewhat icky. There also are some interface concerns - e.g. I'm not sure about passing in @relesae callback during init as that becomes funny when we later implement synchronous kill_and_drain - but nothing too serious and it's quite useable now. cgroup_subsys_state refcnting has already been converted and we should convert module refcnt (Kent?)" * 'for-3.11' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/percpu: percpu-refcount: use RCU-sched insted of normal RCU percpu-refcount: implement percpu_tryget() along with percpu_ref_kill_and_confirm() percpu-refcount: implement percpu_ref_cancel_init() percpu-refcount: add __must_check to percpu_ref_init() and don't use ACCESS_ONCE() in percpu_ref_kill_rcu() percpu-refcount: cosmetic updates percpu-refcount: consistently use plain (non-sched) RCU percpu-refcount: Don't use silly cmpxchg() percpu: implement generic percpu refcounting

lib: Move fonts from drivers/video/console/ to lib/fonts/

2013-06-28T08:28:22Z

Several drivers need font support independent of CONFIG_VT, cfr. commit 9cbce8d7e1dae0744ca4f68d62aa7de18196b6f4, "console/font: Refactor font support code selection logic"). Hence move the fonts and their support logic from drivers/video/console/ to its own library directory lib/fonts/. This also allows to limit processing of drivers/video/console/Makefile to CONFIG_VT=y again. [Kevin Hilman : Update arch/arm/boot/compressed/Makefile] Signed-off-by: Geert Uytterhoeven

net: core: move mac_pton() to lib/net_utils.c

2013-06-05T19:00:27Z

Since we have at least one user of this function outside of CONFIG_NET scope, we have to provide this function independently. The proposed solution is to move it under lib/net_utils.c with corresponding configuration variable and select wherever it is needed. Signed-off-by: Andy Shevchenko Reported-by: Arnd Bergmann Acked-by: David S. Miller Acked-by: Arnd Bergmann Signed-off-by: Greg Kroah-Hartman

percpu: implement generic percpu refcounting

2013-06-03T22:36:41Z

This implements a refcount with similar semantics to atomic_get()/atomic_dec_and_test() - but percpu. It also implements two stage shutdown, as we need it to tear down the percpu counts. Before dropping the initial refcount, you must call percpu_ref_kill(); this puts the refcount in "shutting down mode" and switches back to a single atomic refcount with the appropriate barriers (synchronize_rcu()). It's also legal to call percpu_ref_kill() multiple times - it only returns true once, so callers don't have to reimplement shutdown synchronization. [akpm@linux-foundation.org: fix build] [akpm@linux-foundation.org: coding-style tweak] Signed-off-by: Kent Overstreet Cc: Zach Brown Cc: Felipe Balbi Cc: Greg Kroah-Hartman Cc: Mark Fasheh Cc: Joel Becker Cc: Rusty Russell Cc: Jens Axboe Cc: Asai Thambi S P Cc: Selvan Mani Cc: Sam Bradshaw Cc: Jeff Moyer Cc: Al Viro Cc: Benjamin LaHaise Cc: Tejun Heo Cc: Oleg Nesterov Cc: Christoph Lameter Cc: Ingo Molnar Reviewed-by: "Theodore Ts'o" Signed-off-by: Tejun Heo

lib: make iovec obj instead of lib

2013-05-23T16:17:11Z

Fix build error io vmw_vmci.ko when CONFIG_VMWARE_VMCI=m by chaning iovec.o from lib-y to obj-y. ERROR: "memcpy_toiovec" [drivers/misc/vmw_vmci/vmw_vmci.ko] undefined! ERROR: "memcpy_fromiovec" [drivers/misc/vmw_vmci/vmw_vmci.ko] undefined! Signed-off-by: Randy Dunlap Acked-by: Rusty Russell Signed-off-by: Linus Torvalds

Hoist memcpy_fromiovec/memcpy_toiovec into lib/

2013-05-20T00:54:22Z

ERROR: "memcpy_fromiovec" [drivers/vhost/vhost_scsi.ko] undefined! That function is only present with CONFIG_NET. Turns out that crypto/algif_skcipher.c also uses that outside net, but it actually needs sockets anyway. In addition, commit 6d4f0139d642c45411a47879325891ce2a7c164a added CONFIG_NET dependency to CONFIG_VMCI for memcpy_toiovec, so hoist that function and revert that commit too. socket.h already includes uio.h, so no callers need updating; trying only broke things fo x86_64 randconfig (thanks Fengguang!). Reported-by: Randy Dunlap Acked-by: David S. Miller Acked-by: Michael S. Tsirkin Signed-off-by: Rusty Russell