backports: Remove support for kernel smaller than 4.8

This removes all the code which is needed to support kernel 4.7.

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

.github/workflows/create.yml

@@ -55,7 +55,6 @@ jobs:
     strategy:
       matrix:
         kernel: [
-           "4.7",
            "4.8",
            "4.9",
            "4.10",

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 4.7 and above.
+for kernels 4.8 and above.
 
 # Documentation
 

backport/backport-include/linux/atomic.h

@@ -2,30 +2,6 @@
 #define __BP_ATOMIC_H
 #include_next <linux/atomic.h>
 
-/* atomic_cmpxchg_relaxed */
-#ifndef atomic_cmpxchg_relaxed
-#define  atomic_cmpxchg_relaxed		atomic_cmpxchg
-#define  atomic_cmpxchg_acquire		atomic_cmpxchg
-#define  atomic_cmpxchg_release		atomic_cmpxchg
-
-#else /* atomic_cmpxchg_relaxed */
-
-#ifndef atomic_cmpxchg_acquire
-#define  atomic_cmpxchg_acquire(...)					\
-	__atomic_op_acquire(atomic_cmpxchg, __VA_ARGS__)
-#endif
-
-#ifndef atomic_cmpxchg_release
-#define  atomic_cmpxchg_release(...)					\
-	__atomic_op_release(atomic_cmpxchg, __VA_ARGS__)
-#endif
-
-#ifndef atomic_cmpxchg
-#define  atomic_cmpxchg(...)						\
-	__atomic_op_fence(atomic_cmpxchg, __VA_ARGS__)
-#endif
-#endif /* atomic_cmpxchg_relaxed */
-
 /* these were introduced together, so just a single check is enough */
 #ifndef atomic_try_cmpxchg_acquire
 #ifndef atomic_try_cmpxchg
@@ -68,28 +44,4 @@ static inline int atomic_fetch_add_unless(atomic_t *v, int a, int u)
 #define __atomic_post_full_fence        smp_mb__after_atomic
 #endif
 
-#if LINUX_VERSION_IS_LESS(4,8,0)
-static inline int
-atomic_fetch_add(int i, atomic_t *v)
-{
-	return atomic_add_return(i, v) - i;
-}
-
-static inline int
-atomic_fetch_sub(int i, atomic_t *v)
-{
-	return atomic_sub_return(i, v) + i;
-}
-#endif
-
-#ifndef atomic_fetch_add_relaxed
-#define atomic_fetch_add_relaxed atomic_fetch_add
-#endif
-
-#ifndef atomic_fetch_sub_relaxed
-#define atomic_fetch_sub_acquire atomic_fetch_sub
-#define atomic_fetch_sub_release atomic_fetch_sub
-#define atomic_fetch_sub_relaxed atomic_fetch_sub
-#endif
-
 #endif /* __BP_ATOMIC_H */

backport/backport-include/linux/debugfs.h

@@ -5,8 +5,7 @@
 #include <linux/device.h>
 
 #if LINUX_VERSION_IS_LESS(4,9,0) && \
-    !LINUX_VERSION_IN_RANGE(4,8,4, 4,9,0) && \
-    !LINUX_VERSION_IN_RANGE(4,7,10, 4,8,0)
+    !LINUX_VERSION_IN_RANGE(4,8,4, 4,9,0)
 static inline const struct file_operations *
 debugfs_real_fops(const struct file *filp)
 {
@@ -16,7 +15,7 @@ debugfs_real_fops(const struct file *filp)
 	 */
 	return filp->f_path.dentry->d_fsdata;
 }
-#endif /* <4.9.0 but not >= 4.8.4, 4.7.10 */
+#endif /* <4.9.0 but not >= 4.8.4 */
 
 #ifndef DEFINE_DEBUGFS_ATTRIBUTE
 #define DEFINE_DEBUGFS_ATTRIBUTE(__fops, __get, __set, __fmt) \

backport/backport-include/linux/pci.h

@@ -7,28 +7,6 @@
 #include <linux/pci-aspm.h>
 #endif
 
-
-
-#if LINUX_VERSION_IS_LESS(4,8,0)
-#define pci_alloc_irq_vectors LINUX_BACKPORT(pci_alloc_irq_vectors)
-#ifdef CONFIG_PCI_MSI
-int pci_alloc_irq_vectors(struct pci_dev *dev, unsigned int min_vecs,
-		unsigned int max_vecs, unsigned int flags);
-#else
-static inline int pci_alloc_irq_vectors(struct pci_dev *dev, unsigned int min_vecs,
-		unsigned int max_vecs, unsigned int flags)
-{ return -ENOSYS; }
-#endif
-#endif
-
-#if LINUX_VERSION_IS_LESS(4,8,0)
-#define pci_free_irq_vectors LINUX_BACKPORT(pci_free_irq_vectors)
-static inline void pci_free_irq_vectors(struct pci_dev *dev)
-{
-}
-#endif
-
-
 #if LINUX_VERSION_IS_LESS(4,9,0) &&			\
 	!LINUX_VERSION_IN_RANGE(4,8,13, 4,9,0)
 

backport/backport-include/linux/time.h

@@ -4,14 +4,6 @@
 
 #include <linux/time64.h>
 
-#if LINUX_VERSION_IS_LESS(4,8,0)
-static inline void time64_to_tm(time64_t totalsecs, int offset,
-				struct tm *result)
-{
-	time_to_tm((time_t)totalsecs, 0, result);
-}
-#endif
-
 #ifndef time_after32
 /**
  * time_after32 - compare two 32-bit relative times

backport/compat/Makefile

@@ -7,7 +7,6 @@ endif
 compat-y += main.o
 
 # Kernel backport compatibility code
-compat-$(CPTCFG_KERNEL_4_8) += backport-4.8.o
 compat-$(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