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  1. Nov 21, 2013
  3. Nov 20, 2013
    • Chen Gang's avatar
      avr32: uapi: be sure of "_UAPI" prefix for all guard macros · e7f2c8c1
      Chen Gang authored 
      

For all uapi headers, need use "_UAPI" prefix for its guard macro
(which will be stripped by "scripts/headers_installer.sh").

Also remove redundant files (bitsperlong.h, errno.h, fcntl.h, ioctl.h,
ioctls.h, ipcbuf.h, kvm_para.h, mman.h, poll.h, resource.h, siginfo.h,
statfs.h, and unistd.h) which are already in Kbuild.

Also be sure that all "#endif" only have one empty line above, and each
file has guard macro.

Signed-off-by: default avatarChen Gang <gang.chen@asianux.com>
Signed-off-by: default avatarHans-Christian Egtvedt <hegtvedt@cisco.com>
      e7f2c8c1
    • Eirik Aanonsen's avatar
      avr32: add kprobe_ctlblk memory struct · dbc0d691
      Eirik Aanonsen authored 
      

This re-enables kprobes on AVR32 architecture.

Signed-off-by: default avatarEirik Aanonsen <eaa@wprmedical.com>
Signed-off-by: default avatarHans-Christian Egtvedt <egtvedt@samfundet.no>
      dbc0d691
    • Andreas Bießmann's avatar
      avr32: fix out-of-range jump in large kernels · d617b338
      Andreas Bießmann authored 
      This patch fixes following error (for big kernels):

---8<---
arch/avr32/boot/u-boot/head.o: In function `no_tag_table':
(.init.text+0x44): relocation truncated to fit: R_AVR32_22H_PCREL against symbol `panic' defined in .text.unlikely section in kernel/built-in.o
arch/avr32/kernel/built-in.o: In function `bad_return':
(.ex.text+0x236): relocation truncated to fit: R_AVR32_22H_PCREL against symbol `panic' defined in .text.unlikely section in kernel/built-in.o
--->8---

It comes up when the kernel increases and 'panic()' is too far away to fit in
the +/- 2MiB range. Which in turn issues from the 21-bit displacement in
'br{cond4}' mnemonic which is one of the two ways to do jumps (rjmp has just
10-bit displacement and therefore a way smaller range). This fact was stated
before in 8d29b7b9.
One solution to solve this is to add a local storage for the symbol address
and just load the $pc with that value.

Signed-off-by: Andreas Bie...
      d617b338
    • Andreas Bießmann's avatar
      avr32: setup crt for early panic() · 7a2a74f4
      Andreas Bießmann authored 
      

Before the CRT was (fully) set up in kernel_entry (bss cleared before in
_start, but also not before jump to panic() in no_tag_table case).

This patch fixes this up to have a fully working CRT when branching to panic()
in no_tag_table.

Signed-off-by: default avatarAndreas Bießmann <andreas@biessmann.de>
Acked-by: default avatarHans-Christian Egtvedt <egtvedt@samfundet.no>
Cc: Haavard Skinnemoen <hskinnemoen@gmail.com>
Cc: stable@vger.kernel.org
      7a2a74f4
    • Phillip Lougher's avatar
      Squashfs: Check stream is not NULL in decompressor_multi.c · ed4f381e
      Phillip Lougher authored 
      

Fix static checker complaint that stream is not checked in
squashfs_decompressor_destroy().

Reported-by: default avatarDan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: default avatarPhillip Lougher <phillip@squashfs.org.uk>
Reviewed-by: default avatarMinchan Kim <minchan@kernel.org>
      ed4f381e
    • Phillip Lougher's avatar
      Squashfs: Directly decompress into the page cache for file data · 0d455c12
      Phillip Lougher authored 
      This introduces an implementation of squashfs_readpage_block()
that directly decompresses into the page cache.

This uses the previously added page handler abstraction to push
down the necessary kmap_atomic/kunmap_atomic operations on the
page cache buffers into the decompressors.  This enables
direct copying into the page cache without using the slow
kmap/kunmap calls.

The code detects when multiple threads are racing in
squashfs_readpage() to decompress the same block, and avoids
this regression by falling back to using an intermediate
buffer.

This patch enhances the performance of Squashfs significantly
when multiple processes are accessing the filesystem simultaneously
because it not only reduces memcopying, but it more importantly
eliminates the lock contention on the intermediate buffer.

Using single-thread decompression.

        dd if=file1 of=/dev/null bs=4096 &
        dd if=file2 of=/dev/null bs=4096 &
        dd if=file3 of=/de...
      0d455c12