kernel: remove support for kernel 4.19

We use 5.4 on all targets by default, and 4.19 has never been released
in a stable version. There is no reason to keep it.

Signed-off-by: Adrian Schmutzler <freifunk@adrianschmutzler.de>

1 files changed, 0 insertions, 78 deletions

diff --git a/target/linux/bcm47xx/patches-4.19/160-kmap_coherent.patch b/target/linux/bcm47xx/patches-4.19/160-kmap_coherent.patch
deleted file mode 100644
index db5660bc32..0000000000
--- a/target/linux/bcm47xx/patches-4.19/160-kmap_coherent.patch
+++ /dev/null
@@ -1,78 +0,0 @@
-From: Jeff Hansen <jhansen@cardaccess-inc.com>
-Subject: [PATCH] kmap_coherent
-
-On ASUS WL-500gP there are some "Data bus error"s when executing simple
-commands liks "ps" or "cat /proc/1/cmdline".
-
-This fixes OpenWrt ticket #1485: https://dev.openwrt.org/ticket/1485
----
---- a/arch/mips/include/asm/cpu-features.h
-+++ b/arch/mips/include/asm/cpu-features.h
-@@ -226,6 +226,9 @@
- #ifndef cpu_has_local_ebase
- #define cpu_has_local_ebase	1
- #endif
-+#ifndef cpu_use_kmap_coherent
-+#define cpu_use_kmap_coherent 1
-+#endif
- 
- /*
-  * I-Cache snoops remote store.	 This only matters on SMP.  Some multiprocessors
---- a/arch/mips/include/asm/mach-bcm47xx/cpu-feature-overrides.h
-+++ b/arch/mips/include/asm/mach-bcm47xx/cpu-feature-overrides.h
-@@ -80,4 +80,6 @@
- #define cpu_scache_line_size()		0
- #define cpu_has_vz			0
- 
-+#define cpu_use_kmap_coherent		0
-+
- #endif /* __ASM_MACH_BCM47XX_CPU_FEATURE_OVERRIDES_H */
---- a/arch/mips/mm/c-r4k.c
-+++ b/arch/mips/mm/c-r4k.c
-@@ -694,7 +694,7 @@ static inline void local_r4k_flush_cache
- 		map_coherent = (cpu_has_dc_aliases &&
- 				page_mapcount(page) &&
- 				!Page_dcache_dirty(page));
--		if (map_coherent)
-+		if (map_coherent && cpu_use_kmap_coherent)
- 			vaddr = kmap_coherent(page, addr);
- 		else
- 			vaddr = kmap_atomic(page);
-@@ -719,7 +719,7 @@ static inline void local_r4k_flush_cache
- 	}
- 
- 	if (vaddr) {
--		if (map_coherent)
-+		if (map_coherent && cpu_use_kmap_coherent)
- 			kunmap_coherent();
- 		else
- 			kunmap_atomic(vaddr);
---- a/arch/mips/mm/init.c
-+++ b/arch/mips/mm/init.c
-@@ -168,7 +168,7 @@ void copy_user_highpage(struct page *to,
- 	void *vfrom, *vto;
- 
- 	vto = kmap_atomic(to);
--	if (cpu_has_dc_aliases &&
-+	if (cpu_has_dc_aliases && cpu_use_kmap_coherent &&
- 	    page_mapcount(from) && !Page_dcache_dirty(from)) {
- 		vfrom = kmap_coherent(from, vaddr);
- 		copy_page(vto, vfrom);
-@@ -190,7 +190,7 @@ void copy_to_user_page(struct vm_area_st
- 	struct page *page, unsigned long vaddr, void *dst, const void *src,
- 	unsigned long len)
- {
--	if (cpu_has_dc_aliases &&
-+	if (cpu_has_dc_aliases && cpu_use_kmap_coherent &&
- 	    page_mapcount(page) && !Page_dcache_dirty(page)) {
- 		void *vto = kmap_coherent(page, vaddr) + (vaddr & ~PAGE_MASK);
- 		memcpy(vto, src, len);
-@@ -208,7 +208,7 @@ void copy_from_user_page(struct vm_area_
- 	struct page *page, unsigned long vaddr, void *dst, const void *src,
- 	unsigned long len)
- {
--	if (cpu_has_dc_aliases &&
-+	if (cpu_has_dc_aliases && cpu_use_kmap_coherent &&
- 	    page_mapcount(page) && !Page_dcache_dirty(page)) {
- 		void *vfrom = kmap_coherent(page, vaddr) + (vaddr & ~PAGE_MASK);
- 		memcpy(dst, vfrom, len);