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-rwxr-xr-xscripts/checkpatch.pl11
1 files changed, 11 insertions, 0 deletions
diff --git a/scripts/checkpatch.pl b/scripts/checkpatch.pl
index 5df61f9aa9..7f0aae977d 100755
--- a/scripts/checkpatch.pl
+++ b/scripts/checkpatch.pl
@@ -2911,6 +2911,17 @@ sub process {
if ($rawline =~ /\b(?:Qemu|QEmu)\b/) {
WARN("use QEMU instead of Qemu or QEmu\n" . $herecurr);
}
+
+# check for non-portable ffs() calls that have portable alternatives in QEMU
+ if ($line =~ /\bffs\(/) {
+ ERROR("use ctz32() instead of ffs()\n" . $herecurr);
+ }
+ if ($line =~ /\bffsl\(/) {
+ ERROR("use ctz32() or ctz64() instead of ffsl()\n" . $herecurr);
+ }
+ if ($line =~ /\bffsll\(/) {
+ ERROR("use ctz64() instead of ffsll()\n" . $herecurr);
+ }
}
# If we have no input at all, then there is nothing to report on