backports: Remove support for kernel smaller than 4.10

This removes all the code which is needed to support kernel 4.9.

Signed-off-by: Hauke Mehrtens <[email protected]>

.github/workflows/create.yml

@@ -55,7 +55,6 @@ jobs:
     strategy:
       matrix:
         kernel: [
-           "4.9",
            "4.10",
            "4.11",
            "4.12",

README

@@ -8,7 +8,7 @@ down to older kernels. It currently backports the following subsystems:
   * WWAN
 
 This package provides the latest Linux kernel subsystem enhancements
-for kernels 4.9 and above.
+for kernels 4.10 and above.
 
 # Documentation
 

backport/backport-include/linux/bits.h

@@ -3,8 +3,7 @@
 #include <linux/version.h>
 
 #if LINUX_VERSION_IS_GEQ(4,19,0) || \
-    LINUX_VERSION_IN_RANGE(4,14,119, 4,15,0) || \
-    LINUX_VERSION_IN_RANGE(4,9,176, 4,10,0)
+    LINUX_VERSION_IN_RANGE(4,14,119, 4,15,0)
 #include_next <linux/bits.h>
 #else
 #include <linux/bitops.h>

backport/backport-include/linux/interrupt.h

@@ -2,46 +2,6 @@
 #define _BP_LINUX_INTERRUPT_H
 #include <linux/version.h>
 #include_next <linux/interrupt.h>
-#include <linux/ktime.h>
-
-#if LINUX_VERSION_IS_LESS(4,10,0)
-
-/* Forward a hrtimer so it expires after now: */
-static inline u64
-backport_hrtimer_forward(struct hrtimer *timer, ktime_t now, s64 interval)
-{
-	ktime_t _interval = { .tv64 = interval };
-
-	return hrtimer_forward(timer, now, _interval);
-}
-#define hrtimer_forward LINUX_BACKPORT(hrtimer_forward)
-
-static inline u64
-backport_hrtimer_forward_now(struct hrtimer *timer, s64 interval)
-{
-	ktime_t _interval = { .tv64 = interval };
-
-	return hrtimer_forward_now(timer, _interval);
-}
-#define hrtimer_forward_now LINUX_BACKPORT(hrtimer_forward_now)
-
-static inline s64 backport_ns_to_ktime(u64 ns)
-{
-	ktime_t _time = ns_to_ktime(ns);
-
-	return _time.tv64;
-}
-#define ns_to_ktime LINUX_BACKPORT(ns_to_ktime)
-
-static inline void backport_hrtimer_start(struct hrtimer *timer, s64 time,
-					  const enum hrtimer_mode mode)
-{
-	ktime_t _time = { .tv64 = time };
-	hrtimer_start(timer, _time, mode);
-}
-#define hrtimer_start LINUX_BACKPORT(hrtimer_start)
-
-#endif
 
 #if LINUX_VERSION_IS_LESS(5,9,0)
 

backport/backport-include/linux/netdevice.h

@@ -5,28 +5,6 @@
 #include <backport/magic.h>
 
 
-#if LINUX_VERSION_IS_LESS(4,10,0)
-static inline bool backport_napi_complete_done(struct napi_struct *n, int work_done)
-{
-	if (unlikely(test_bit(NAPI_STATE_NPSVC, &n->state)))
-		return false;
-
-	napi_complete_done(n, work_done);
-	return true;
-}
-
-static inline bool backport_napi_complete(struct napi_struct *n)
-{
-	return backport_napi_complete_done(n, 0);
-}
-#define napi_complete_done LINUX_BACKPORT(napi_complete_done)
-#define napi_complete LINUX_BACKPORT(napi_complete)
-#endif /* < 4.10 */
-
-#ifndef NETIF_F_CSUM_MASK
-#define NETIF_F_CSUM_MASK NETIF_F_ALL_CSUM
-#endif
-
 #if LINUX_VERSION_IS_LESS(4,11,9)
 #define netdev_set_priv_destructor(_dev, _destructor) \
 	(_dev)->destructor = __ ## _destructor

backport/backport-include/linux/nospec.h

@@ -2,8 +2,7 @@
 #define _BACKPORT_LINUX_NOSPEC_H
 
 #if LINUX_VERSION_IS_GEQ(4,15,2) || \
-    LINUX_VERSION_IN_RANGE(4,14,18, 4,15,0) || \
-    LINUX_VERSION_IN_RANGE(4,9,81, 4,10,0)
+    LINUX_VERSION_IN_RANGE(4,14,18, 4,15,0)
 #include_next <linux/nospec.h>
 #else
 #define array_index_nospec(index, size)	(index)

backport/backport-include/linux/skbuff.h

@@ -107,8 +107,7 @@ static inline void nf_reset_ct(struct sk_buff *skb)
 #if LINUX_VERSION_IS_LESS(5,6,0) &&			\
 	!LINUX_VERSION_IN_RANGE(5,4,69, 5,5,0) &&	\
 	!LINUX_VERSION_IN_RANGE(4,19,149, 4,20,0) &&	\
-	!LINUX_VERSION_IN_RANGE(4,14,200, 4,15,0) &&	\
-	!LINUX_VERSION_IN_RANGE(4,9,238, 4,10,0)
+	!LINUX_VERSION_IN_RANGE(4,14,200, 4,15,0)
 /**
  *	skb_queue_len_lockless	- get queue length
  *	@list_: list to measure

backport/backport-include/linux/virtio_config.h

@@ -12,11 +12,7 @@ struct irq_affinity;
 static inline
 int virtio_find_vqs(struct virtio_device *vdev, unsigned nvqs,
 			struct virtqueue *vqs[], vq_callback_t *callbacks[],
-#if LINUX_VERSION_IS_LESS(4,10,0)
-			const char * const names[],
-#else
 			const char *names[],
-#endif
 			struct irq_affinity *desc)
 {
 #if LINUX_VERSION_IS_LESS(4,11,0)

backport/backport-include/net/genetlink.h

@@ -50,12 +50,6 @@ static inline void *genl_info_userhdr(struct genl_info *info)
 	return (u8 *)info->genlhdr + GENL_HDRLEN;
 }
 
-#if LINUX_VERSION_IS_LESS(4,10,0)
-#define __genl_ro_after_init
-#else
-#define __genl_ro_after_init __ro_after_init
-#endif
-
 #if LINUX_VERSION_IS_LESS(4,15,0)
 #define genlmsg_nlhdr LINUX_BACKPORT(genlmsg_nlhdr)
 static inline struct nlmsghdr *genlmsg_nlhdr(void *user_hdr)

backport/backport-include/net/netlink.h

@@ -435,19 +435,6 @@ static inline int _nla_parse_nested4(struct nlattr *tb[], int maxtype,
 	macro_dispatcher(_nla_parse_nested, __VA_ARGS__)(__VA_ARGS__)
 #endif /* LINUX_VERSION_IS_LESS(4,12,0) */
 
-#if LINUX_VERSION_IS_LESS(4,10,0)
-/**
- * nla_memdup - duplicate attribute memory (kmemdup)
- * @src: netlink attribute to duplicate from
- * @gfp: GFP mask
- */
-#define nla_memdump LINUX_BACKPORT(nla_memdup)
-static inline void *nla_memdup(const struct nlattr *src, gfp_t gfp)
-{
-	return kmemdup(nla_data(src), nla_len(src), gfp);
-}
-#endif /* < 4.9 */
-
 #ifndef NLA_POLICY_MIN_LEN
 #define NLA_POLICY_MIN_LEN(_len) {		\
 	.type = NLA_BINARY			\

backport/compat/Makefile

@@ -7,7 +7,6 @@ endif
 compat-y += main.o
 
 # Kernel backport compatibility code
-compat-$(CPTCFG_KERNEL_4_10) += backport-4.10.o
 compat-$(CPTCFG_KERNEL_4_11) += backport-4.11.o
 compat-$(CPTCFG_KERNEL_4_12) += backport-4.12.o
 compat-$(CPTCFG_KERNEL_4_18) += backport-4.18.o