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, 74 deletions

diff --git a/target/linux/bcm47xx/patches-4.19/310-no_highpage.patch b/target/linux/bcm47xx/patches-4.19/310-no_highpage.patch
deleted file mode 100644
index 09bfc64552..0000000000
--- a/target/linux/bcm47xx/patches-4.19/310-no_highpage.patch
+++ /dev/null
@@ -1,74 +0,0 @@
-From: Jeff Hansen <jhansen@cardaccess-inc.com>
-Subject: [PATCH] no highpage
-
-On ASUS WL-500gP there are many unexpected "Segmentation fault"s that
-seem to be caused by a kernel. They can be avoided by:
-1) Disabling highpage
-2) Using flush_cache_mm in flush_cache_dup_mm
-
-For details see OpenWrt ticket #2035 https://dev.openwrt.org/ticket/2035
----
---- a/arch/mips/include/asm/page.h
-+++ b/arch/mips/include/asm/page.h
-@@ -71,6 +71,7 @@ static inline unsigned int page_size_ftl
- #endif /* CONFIG_MIPS_HUGE_TLB_SUPPORT */
- 
- #include <linux/pfn.h>
-+#include <asm/cpu-features.h>
- 
- extern void build_clear_page(void);
- extern void build_copy_page(void);
-@@ -110,11 +111,16 @@ static inline void clear_user_page(void
- 		flush_data_cache_page((unsigned long)addr);
- }
- 
--struct vm_area_struct;
--extern void copy_user_highpage(struct page *to, struct page *from,
--	unsigned long vaddr, struct vm_area_struct *vma);
-+static inline void copy_user_page(void *vto, void *vfrom, unsigned long vaddr,
-+	struct page *to)
-+{
-+	extern void (*flush_data_cache_page)(unsigned long addr);
- 
--#define __HAVE_ARCH_COPY_USER_HIGHPAGE
-+	copy_page(vto, vfrom);
-+	if (!cpu_has_ic_fills_f_dc ||
-+	    pages_do_alias((unsigned long)vto, vaddr & PAGE_MASK))
-+		flush_data_cache_page((unsigned long)vto);
-+}
- 
- /*
-  * These are used to make use of C type-checking..
---- a/arch/mips/mm/init.c
-+++ b/arch/mips/mm/init.c
-@@ -162,30 +162,6 @@ void kunmap_coherent(void)
- 	preempt_enable();
- }
- 
--void copy_user_highpage(struct page *to, struct page *from,
--	unsigned long vaddr, struct vm_area_struct *vma)
--{
--	void *vfrom, *vto;
--
--	vto = kmap_atomic(to);
--	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);
--		kunmap_coherent();
--	} else {
--		vfrom = kmap_atomic(from);
--		copy_page(vto, vfrom);
--		kunmap_atomic(vfrom);
--	}
--	if ((!cpu_has_ic_fills_f_dc) ||
--	    pages_do_alias((unsigned long)vto, vaddr & PAGE_MASK))
--		flush_data_cache_page((unsigned long)vto);
--	kunmap_atomic(vto);
--	/* Make sure this page is cleared on other CPU's too before using it */
--	smp_wmb();
--}
--
- void copy_to_user_page(struct vm_area_struct *vma,
- 	struct page *page, unsigned long vaddr, void *dst, const void *src,
- 	unsigned long len)