Eric Lee / smarc-fsl-linux-kernel

04 Feb, 2019

1 commit

  • 47b8f3ab9   refcount_t: Add ACQUIRE ordering on success for dec(sub)_and_test() variants ... Browse Code »

    This adds an smp_acquire__after_ctrl_dep() barrier on successful
    decrease of refcounter value from 1 to 0 for refcount_dec(sub)_and_test
    variants and therefore gives stronger memory ordering guarantees than
    prior versions of these functions.

    Co-developed-by: Peter Zijlstra (Intel)
    Signed-off-by: Elena Reshetova
    Signed-off-by: Peter Zijlstra (Intel)
    Reviewed-by: Andrea Parri
    Cc: Andrew Morton
    Cc: Linus Torvalds
    Cc: Paul E. McKenney
    Cc: Peter Zijlstra
    Cc: Thomas Gleixner
    Cc: Will Deacon
    Cc: dvyukov@google.com
    Cc: keescook@chromium.org
    Cc: stern@rowland.harvard.edu
    Link: https://lkml.kernel.org/r/1548847131-27854-2-git-send-email-elena.reshetova@intel.com
    Signed-off-by: Ingo Molnar

    Elena Reshetova
     

09 May, 2018

1 commit

12 Dec, 2017

1 commit

  • b6e859f6c   docs: refcount_t documentation ... Browse Code »

    Some functions from refcount_t API provide different
    memory ordering guarantees that their atomic counterparts.
    This adds a document outlining these differences (
    Documentation/core-api/refcount-vs-atomic.rst) as well as
    some other minor improvements.

    Signed-off-by: Elena Reshetova
    Signed-off-by: Kees Cook
    Signed-off-by: Jonathan Corbet

    Elena Reshetova