[PATCH] backports: add spatch to handle IFF_NO_QUEUE

[PATCH] backports: add spatch to handle IFF_NO_QUEUE

[Johannes Berg]

From: Johannes Berg <johannes.berg@intel.com>

This flag doesn't exist on newer kernels, but replaced the tx_queue_len
assignment, so can't just be backported to have no effect. Instead, add
a semantic patch that puts back the tx_queue_len=0 assignment on older
kernel versions.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
---
 patches/collateral-evolutions/network/0062-iff-no-queue.cocci | 9 +++++++++
 1 file changed, 9 insertions(+)
 create mode 100644 patches/collateral-evolutions/network/0062-iff-no-queue.cocci

diff --git a/patches/collateral-evolutions/network/0062-iff-no-queue.cocci b/patches/collateral-evolutions/network/0062-iff-no-queue.cocci
new file mode 100644
index 000000000000..984dcbe64bad
--- /dev/null
+++ b/patches/collateral-evolutions/network/0062-iff-no-queue.cocci
@@ -0,0 +1,9 @@
+@@
+expression E;
+@@
+
++#if LINUX_VERSION_CODE >= KERNEL_VERSION(4,2,0)
+ E->priv_flags |= IFF_NO_QUEUE;
++#else
++E->tx_queue_len = 0;
++#endif
-- 
2.1.4

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Re: [PATCH] backports: add spatch to handle IFF_NO_QUEUE

[Johannes Berg]

On Wed, 2015-08-26 at 09:07 +0200, Johannes Berg wrote:
> 
> ++#if LINUX_VERSION_CODE >= KERNEL_VERSION(4,2,0)
> 
Actually, that needs to be > instead of >= of course.

johannes
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