Eric Lee / smarc-fsl-linux-kernel

28 Apr, 2020

1 commit

  • b3d73156b   rcu: Reinstate synchronize_rcu_mult() ... Browse Code »

    With the advent and likely usage of synchronize_rcu_rude(), there is
    again a need to wait on multiple types of RCU grace periods, for
    example, call_rcu_tasks() and call_rcu_tasks_rude(). This commit
    therefore reinstates synchronize_rcu_mult() in order to allow these
    grace periods to be straightforwardly waited on concurrently.

    Signed-off-by: Paul E. McKenney

    Paul E. McKenney
     

09 Nov, 2018

1 commit

  • 309ba859b   rcu: Eliminate synchronize_rcu_mult() ... Browse Code »

    Now that synchronize_rcu() waits for both RCU read-side critical
    sections and preempt-disabled regions of code, the sole caller of
    synchronize_rcu_mult() can be replaced by synchronize_rcu().
    This patch makes this change and removes synchronize_rcu_mult().
    Note that _wait_rcu_gp() still supports synchronize_rcu_mult(),
    and thus might be simplified in the future to take only take
    a single call_rcu() function rather than the current list of them.

    Signed-off-by: Paul E. McKenney

    Paul E. McKenney
     

31 Aug, 2018

2 commits

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
     

02 Mar, 2017

1 commit

  • f9411ebe3   rcu: Separate the RCU synchronization types and APIs into <linux/rcupdate_wait.h> ... Browse Code »

    So rcupdate.h is a pretty complex header, in particular it includes
    which includes - creating a
    dependency that includes in ,
    which prevents the isolation of from the derived
    header.

    Solve part of the problem by decoupling rcupdate.h from completions:
    this can be done by separating out the rcu_synchronize types and APIs,
    and updating their usage sites.

    Since this is a mostly RCU-internal types this will not just simplify
    's dependencies, but will make all the hundreds of
    .c files that include rcupdate.h but not completions or wait.h build
    faster.

    ( For rcutiny this means that two dependent APIs have to be uninlined,
    but that shouldn't be much of a problem as they are rare variants. )

    Acked-by: Linus Torvalds
    Cc: Mike Galbraith
    Cc: Paul E. McKenney
    Cc: Peter Zijlstra
    Cc: Thomas Gleixner
    Cc: linux-kernel@vger.kernel.org
    Signed-off-by: Ingo Molnar

    Ingo Molnar