[Qemu-devel] [PATCH] checkpatch: allow tabs in linux-headers

["Radim Krčmář" <rkrcmar@redhat.com>]

2016-08-09 08:31-0700, no-reply@ec2-52-6-146-230.compute-1.amazonaws.com:
> Hi,
> 
> Your series seems to have some coding style problems. See output below for
> more information:
> 
> Message-id: 20160809150333.9991-1-rkrcmar@redhat.com
> Type: series
> Subject: [Qemu-devel] [PATCH for-2.7 0/2] intel-iommu: restrict EIM to quirkless KVM
> 
> === TEST SCRIPT BEGIN ===
> #!/bin/bash
> 
> BASE=base
> n=1
> total=$(git log --oneline $BASE.. | wc -l)
> failed=0
> 
> commits="$(git log --format=%H --reverse $BASE..)"
> for c in $commits; do
>     echo "Checking PATCH $n/$total: $(git show --no-patch --format=%s $c)..."
>     if ! git show $c --format=email | ./scripts/checkpatch.pl --mailback -; then
>         failed=1
>         echo
>     fi
>     n=$((n+1))
> done
> 
> exit $failed
> === TEST SCRIPT END ===
> 
> Updating 3c8cf5a9c21ff8782164d1def7f44bd888713384
> Switched to a new branch 'test'
> e018fb0 intel-iommu: restrict EIM to quirkless KVM
> 5ef6f2f linux-headers: update to v4.8-rc1
> 
> === OUTPUT BEGIN ===
> Checking PATCH 1/2: linux-headers: update to v4.8-rc1...
> ERROR: code indent should never use tabs
> #32: FILE: linux-headers/linux/kvm.h:885:
> +^Iunion {$
> 
> ERROR: code indent should never use tabs
> #33: FILE: linux-headers/linux/kvm.h:886:
> +^I^I__u32 pad;$
> 
> ERROR: code indent should never use tabs
> #34: FILE: linux-headers/linux/kvm.h:887:
> +^I^I__u32 devid;$
> 
> ERROR: code indent should never use tabs
> #35: FILE: linux-headers/linux/kvm.h:888:
> +^I};$
> 
> ERROR: code indent should never use tabs
> #43: FILE: linux-headers/linux/kvm.h:1034:
> +#define KVM_MSI_VALID_DEVID^I(1U << 0)$
> 
> ERROR: code indent should never use tabs
> #50: FILE: linux-headers/linux/kvm.h:1040:
> +^I__u32 devid;$
> 
> ERROR: code indent should never use tabs
> #51: FILE: linux-headers/linux/kvm.h:1041:
> +^I__u8  pad[12];$
> 
> ERROR: code indent should never use tabs
> #59: FILE: linux-headers/linux/kvm.h:1086:
> +^IKVM_DEV_TYPE_ARM_VGIC_ITS,$
> 
> ERROR: code indent should never use tabs
> #60: FILE: linux-headers/linux/kvm.h:1087:
> +#define KVM_DEV_TYPE_ARM_VGIC_ITS^IKVM_DEV_TYPE_ARM_VGIC_ITS$
> 
> total: 9 errors, 0 warnings, 51 lines checked
> 
> Your patch has style problems, please review.  If any of these errors
> are false positives report them to the maintainer, see
> CHECKPATCH in MAINTAINERS.

These indentation errors are false positives.
---8<---
Make scripts/checkpatch.pl accept tabs in linux-headers/, instead of
changing scripts/update-linux-headers.sh to expand tabs when importing.

Signed-off-by: Radim Krčmář <rkrcmar@redhat.com>
---
diff --git a/scripts/checkpatch.pl b/scripts/checkpatch.pl
index 929708721299..38232d4b25c3 100755
--- a/scripts/checkpatch.pl
+++ b/scripts/checkpatch.pl
@@ -1355,7 +1355,7 @@ sub process {
 		next if ($realfile !~ /\.(h|c|cpp|pl)$/);
 
 # in QEMU, no tabs are allowed
-		if ($rawline =~ /^\+.*\t/) {
+		if ($rawline =~ /^\+.*\t/ && $realfile !~ /^linux-headers\//) {
 			my $herevet = "$here\n" . cat_vet($rawline) . "\n";
 			ERROR("code indent should never use tabs\n" . $herevet);
 			$rpt_cleaners = 1;