mb() API can relpace the dsb() API in the kernel code. So, dsb() usage is discouraged. However, there are exceptions when dsb is used in a variable or a function name. Exceptions are when 'dsb' is prefixed with class [-_>*\.] and/or suffixed with class [-_\.;].
Signed-off-by: Prakruthi Deepak Heragu <pher...@codeaurora.org> --- scripts/checkpatch.pl | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/scripts/checkpatch.pl b/scripts/checkpatch.pl index a9c0550..978c752 100755 --- a/scripts/checkpatch.pl +++ b/scripts/checkpatch.pl @@ -5372,6 +5372,12 @@ sub process { "Avoid line continuations in quoted strings\n" . $herecurr); } +# dsb is too ARMish, and should usually be mb. + if ($line =~ /[^-_>*\.]\bdsb\b[^-_\.;]/) { + WARN("ARM_BARRIER", + "Use of dsb is discouranged: prefer mb.\n" . + $herecurr); + } # warn about #if 0 if ($line =~ /^.\s*\#\s*if\s+0\b/) { CHK("REDUNDANT_CODE", -- The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum, a Linux Foundation Collaborative Project