Gitweb: http://git.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=a0a9983509f45b2225ca87fdcf7b40ea916834ed Commit: a0a9983509f45b2225ca87fdcf7b40ea916834ed Parent: e53252d97e670a38b1d2e9723b48077bba11ddda Author: David Brownell <[EMAIL PROTECTED]> AuthorDate: Thu Jul 19 01:47:52 2007 -0700 Committer: Linus Torvalds <[EMAIL PROTECTED]> CommitDate: Thu Jul 19 10:04:43 2007 -0700
gpio calls don't need i/o barriers Clarify that drivers using the GPIO operations don't need to issue io barrier instructions themselves. Previously this wasn't clear, and at least one platform assumed otherwise (and would thus break various otherwise-portable drivers which don't issue barriers). Signed-off-by: David Brownell <[EMAIL PROTECTED]> Signed-off-by: Andrew Morton <[EMAIL PROTECTED]> Signed-off-by: Linus Torvalds <[EMAIL PROTECTED]> --- Documentation/gpio.txt | 3 +++ 1 files changed, 3 insertions(+), 0 deletions(-) diff --git a/Documentation/gpio.txt b/Documentation/gpio.txt index 36af58e..218a865 100644 --- a/Documentation/gpio.txt +++ b/Documentation/gpio.txt @@ -75,6 +75,9 @@ using the include file: If you stick to this convention then it'll be easier for other developers to see what your code is doing, and help maintain it. +Note that these operations include I/O barriers on platforms which need to +use them; drivers don't need to add them explicitly. + Identifying GPIOs ----------------- - To unsubscribe from this list: send the line "unsubscribe git-commits-head" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html