Eric Lee / smarc-fsl-linux-kernel

02 Nov, 2017

1 commit

  • b24413180   License cleanup: add SPDX GPL-2.0 license identifier to files with no license ... Browse Code »

    Many source files in the tree are missing licensing information, which
    makes it harder for compliance tools to determine the correct license.

    By default all files without license information are under the default
    license of the kernel, which is GPL version 2.

    Update the files which contain no license information with the 'GPL-2.0'
    SPDX license identifier. The SPDX identifier is a legally binding
    shorthand, which can be used instead of the full boiler plate text.

    This patch is based on work done by Thomas Gleixner and Kate Stewart and
    Philippe Ombredanne.

    How this work was done:

    Patches were generated and checked against linux-4.14-rc6 for a subset of
    the use cases:
    - file had no licensing information it it.
    - file was a */uapi/* one with no licensing information in it,
    - file was a */uapi/* one with existing licensing information,

    Further patches will be generated in subsequent months to fix up cases
    where non-standard license headers were used, and references to license
    had to be inferred by heuristics based on keywords.

    The analysis to determine which SPDX License Identifier to be applied to
    a file was done in a spreadsheet of side by side results from of the
    output of two independent scanners (ScanCode & Windriver) producing SPDX
    tag:value files created by Philippe Ombredanne. Philippe prepared the
    base worksheet, and did an initial spot review of a few 1000 files.

    The 4.13 kernel was the starting point of the analysis with 60,537 files
    assessed. Kate Stewart did a file by file comparison of the scanner
    results in the spreadsheet to determine which SPDX license identifier(s)
    to be applied to the file. She confirmed any determination that was not
    immediately clear with lawyers working with the Linux Foundation.

    Criteria used to select files for SPDX license identifier tagging was:
    - Files considered eligible had to be source code files.
    - Make and config files were included as candidates if they contained >5
    lines of source
    - File already had some variant of a license header in it (even if
    Reviewed-by: Philippe Ombredanne
    Reviewed-by: Thomas Gleixner
    Signed-off-by: Greg Kroah-Hartman

    Greg Kroah-Hartman
     

07 Dec, 2015

1 commit

  • 9cdce3c07   ufs: get rid of ->setattr() for symlinks ... Browse Code »

    It was to needed for a couple of months in 2010, until UFS
    quota support got dropped. Since then it's equivalent to
    simple_setattr() (i.e. the default) for everything except the
    regular files. And dropping it there allows to convert all
    UFS symlinks to {page,simple}_symlink_inode_operations, getting
    rid of fs/ufs/symlink.c completely.

    Signed-off-by: Al Viro

    Al Viro
     

07 Jul, 2015

4 commits

  • 010d331fc   ufs: move truncate code into inode.c ... Browse Code »

    It is closely tied to block pointers handling there, can benefit
    from existing helpers, etc. - no point keeping them apart.

    Trimmed the trailing whitespaces in inode.c at the same time.

    Signed-off-by: Al Viro

    Al Viro
     
  • dff7cfd36   ufs: kill lock_ufs() ... Browse Code »

    There were 3 remaining users; in two of them we took ->s_lock immediately
    after lock_ufs() and held it until just before unlock_ufs(); the third
    one (statfs) could not be called from itself or from other two (remount
    and sync_fs). Just use ->s_lock in statfs and don't bother with lock_ufs
    at all.

    Signed-off-by: Al Viro

    Al Viro
     
  • 724bb09fd   ufs: don't use lock_ufs() for block pointers tree protection ... Browse Code »

    * stores to block pointers are under per-inode seqlock (meta_lock) and
    mutex (truncate_mutex)
    * fetches of block pointers are either under truncate_mutex, or wrapped
    into seqretry loop on meta_lock
    * all changes of ->i_size are under truncate_mutex and i_mutex
    * all changes of ->i_lastfrag are under truncate_mutex

    It's similar to what ext2 is doing; the main difference is that unlike
    ext2 we can't rely upon the atomicity of stores into block pointers -
    on UFS2 they are 64bit. So we can't cut the corner when switching
    a pointer from NULL to non-NULL as we could in ext2_splice_branch()
    and need to use meta_lock on all modifications.

    We use seqlock where ext2 uses rwlock; ext2 could probably also benefit
    from such change...

    Another non-trivial difference is that with UFS we *cannot* have reader
    grab truncate_mutex in case of race - it has to keep retrying. That
    might be possible to change, but not until we lift tail unpacking
    several levels up in call chain.

    After that commit we do *NOT* hold fs-wide serialization on accesses
    to block pointers anymore. Moreover, lock_ufs() can become a normal
    mutex now - it's only used on statfs, remount and sync_fs and none
    of those uses are recursive. As the matter of fact, *now* it can be
    collapsed with ->s_lock, and be eventually replaced with saner
    per-cylinder-group spinlocks, but that's a separate story.

    Signed-off-by: Al Viro

    Al Viro
     
  • d622f167b   ufs: switch ufs_evict_inode() to trimmed-down variant of ufs_truncate() ... Browse Code »

    Signed-off-by: Al Viro

    Al Viro
     

16 Jun, 2015

2 commits

  • 70d45cdb6   ufs: don't touch mtime/ctime of directory being moved ... Browse Code »

    See "ext2: Do not update mtime of a moved directory" (and followup in
    "ext2: fix unbalanced kmap()/kunmap()") for background; this is UFS
    equivalent - the same problem exists here.

    Signed-off-by: Al Viro

    Al Viro
     
  • cdd9eefdf   fs/ufs: restore s_lock mutex ... Browse Code »

    Commit 0244756edc4b98c ("ufs: sb mutex merge + mutex_destroy") generated
    deadlocks in read/write mode on mkdir.

    This patch partially reverts it keeping fixes by Andrew Morton and
    mutex_destroy()

    [AV: fixed a missing bit in ufs_remount()]

    Signed-off-by: Fabian Frederick
    Reported-by: Ian Campbell
    Suggested-by: Jan Kara
    Cc: Ian Campbell
    Cc: Evgeniy Dushistov
    Cc: Alexey Khoroshilov
    Cc: Roger Pau Monne
    Cc: Ian Jackson
    Cc: Al Viro
    Cc:
    Signed-off-by: Andrew Morton
    Signed-off-by: Al Viro

    Fabian Frederick
     

09 Aug, 2014

2 commits

  • d4beaabd3   fs/ufs: convert UFSD printk to pr_debug ... Browse Code »

    Convert no level printk to pr_debug in UFSD. DEBUG is defined with
    CONFIG_UFS_DEBUG so pr_debug are emitted here.

    Also fixing call to UFSD (add;)

    Signed-off-by: Fabian Frederick
    Cc: Evgeniy Dushistov
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    Fabian Frederick
     
  • de771bdaa   fs/ufs: use pr_fmt ... Browse Code »

    Replace UFS-fs, UFS-fs: and UFS: by pr_fmt with module name "ufs: "

    Signed-off-by: Fabian Frederick
    Cc: Evgeniy Dushistov
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    Fabian Frederick
     

07 Jun, 2014

1 commit

  • 0244756ed   ufs: sb mutex merge + mutex_destroy ... Browse Code »

    Commit 788257d6101d ("ufs: remove the BKL") replaced BKL with mutex
    protection using functions lock_ufs, unlock_ufs and struct mutex 'mutex'
    in sb_info.

    Commit b6963327e052 ("ufs: drop lock/unlock super") removed lock/unlock
    super and added struct mutex 's_lock' in sb_info.

    Those 2 mutexes are generally locked/unlocked at the same time except in
    allocation (balloc, ialloc).

    This patch merges the 2 mutexes and propagates first commit solution.
    It also adds mutex destruction before kfree during ufs_fill_super
    failure and ufs_put_super.

    [akpm@linux-foundation.org: avoid ifdefs, return -EROFS not -EINVAL]
    Signed-off-by: Fabian Frederick
    Cc: Evgeniy Dushistov
    Cc: "Chen, Jet"
    Cc: Wu Fengguang
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    Fabian Frederick
     

10 Oct, 2012

1 commit

23 Jul, 2012

1 commit

  • 9e9ad5f40   fs/ufs: get rid of write_super ... Browse Code »

    This patch makes UFS stop using the VFS '->write_super()' method along with
    the 's_dirt' superblock flag, because they are on their way out.

    The way we implement this is that we schedule a delay job instead relying on
    's_dirt' and '->write_super()'.

    The whole "superblock write-out" VFS infrastructure is served by the
    'sync_supers()' kernel thread, which wakes up every 5 (by default) seconds and
    writes out all dirty superblocks using the '->write_super()' call-back. But the
    problem with this thread is that it wastes power by waking up the system every
    5 seconds, even if there are no diry superblocks, or there are no client
    file-systems which would need this (e.g., btrfs does not use
    '->write_super()'). So we want to kill it completely and thus, we need to make
    file-systems to stop using the '->write_super()' VFS service, and then remove
    it together with the kernel thread.

    Tested using fsstress from the LTP project.

    Signed-off-by: Artem Bityutskiy
    Signed-off-by: Al Viro

    Artem Bityutskiy
     

04 Jan, 2012

1 commit

01 Nov, 2011

1 commit

  • b9075fa96   treewide: use __printf not __attribute__((format(printf,...))) ... Browse Code »

    Standardize the style for compiler based printf format verification.
    Standardized the location of __printf too.

    Done via script and a little typing.

    $ grep -rPl --include=*.[ch] -w "__attribute__" * | \
    grep -vP "^(tools|scripts|include/linux/compiler-gcc.h)" | \
    xargs perl -n -i -e 'local $/; while (<>) { s/\b__attribute__\s*\(\s*\(\s*format\s*\(\s*printf\s*,\s*(.+)\s*,\s*(.+)\s*\)\s*\)\s*\)/__printf($1, $2)/g ; print; }'

    [akpm@linux-foundation.org: revert arch bits]
    Signed-off-by: Joe Perches
    Cc: "Kirill A. Shutemov"
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    Joe Perches
     

03 Mar, 2011

1 commit

  • 788257d61   ufs: remove the BKL ... Browse Code »

    This introduces a new per-superblock mutex in UFS to replace
    the big kernel lock. I have been careful to avoid nested
    calls to lock_ufs and to get the lock order right with
    respect to other mutexes, in particular lock_super.

    I did not make any attempt to prove that the big kernel
    lock is not needed in a particular place in the code,
    which is very possible.

    The mutex has a significant performance impact, so it is only
    used on SMP or PREEMPT configurations.

    As Nick Piggin noticed, any allocation inside of the lock
    may end up deadlocking when we get to ufs_getfrag_block
    in the reclaim task, so we now use GFP_NOFS.

    Signed-off-by: Arnd Bergmann
    Tested-by: Nick Bowler
    Cc: Evgeniy Dushistov
    Cc: Nick Piggin

    Arnd Bergmann
     

10 Aug, 2010

1 commit

22 May, 2010

1 commit

06 Mar, 2010

1 commit

  • a9185b41a   pass writeback_control to ->write_inode ... Browse Code »

    This gives the filesystem more information about the writeback that
    is happening. Trond requested this for the NFS unstable write handling,
    and other filesystems might benefit from this too by beeing able to
    distinguish between the different callers in more detail.

    Signed-off-by: Christoph Hellwig
    Signed-off-by: Al Viro

    Christoph Hellwig
     

04 Mar, 2010

1 commit

16 Dec, 2009

1 commit

12 Jun, 2009

1 commit

09 May, 2009

1 commit

28 Mar, 2009

1 commit

  • f33219b7a   ufs: don't truncate longer ufs2 fast symlinks ... Browse Code »

    ufs2 fast symlinks can be twice as long as ufs ones, however the code
    was using the ufs size in various places. Fix that so ufs2 symlinks over
    60 characters aren't truncated.

    Note that we copy the entire area instead of using the maxsymlinklen field
    from the superblock. This way we will be more robust against corruption (of
    the superblock).

    While we are at it, use memcpy instead of open-coding it with for loops.

    Signed-off-by: Duane Griffin
    Signed-off-by: Al Viro

    Duane Griffin
     

13 May, 2008

1 commit

28 Apr, 2008

1 commit

08 Feb, 2008

1 commit

  • b55c460da   iget: stop UFS from using iget() and read_inode() ... Browse Code »

    Stop the UFS filesystem from using iget() and read_inode(). Replace
    ufs_read_inode() with ufs_iget(), and call that instead of iget(). ufs_iget()
    then uses iget_locked() directly and returns a proper error code instead of an
    inode in the event of an error.

    ufs_fill_super() returns any error incurred when getting the root inode
    instead of EINVAL.

    [akpm@linux-foundation.org: coding-style fixes]
    Signed-off-by: David Howells
    Cc: Evgeniy Dushistov
    Acked-by: Christoph Hellwig
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    David Howells
     

17 Oct, 2007

1 commit

  • bcd6d4ecf   ufs: move non-layout parts of ufs_fs.h to fs/ufs/ ... Browse Code »

    Move prototypes and in-core structures to fs/ufs/ similar to what most
    other filesystems already do.

    I made little modifications: move also ufs debug macros and
    mount options constants into fs/ufs/ufs.h, this stuff
    also private for ufs.

    Signed-off-by: Christoph Hellwig
    Signed-off-by: Evgeniy Dushistov
    Cc: Al Viro
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    Christoph Hellwig