kernel: delete Linux 5.4 config and patches

As the upcoming release will be based on Linux 5.10 only, remove all
kernel configuration as well as patches for Linux 5.4.
There were no targets still actively using Linux 5.4.

Signed-off-by: Daniel Golle <daniel@makrotopia.org>

1 files changed, 0 insertions, 74 deletions

diff --git a/target/linux/bcm47xx/patches-5.4/310-no_highpage.patch b/target/linux/bcm47xx/patches-5.4/310-no_highpage.patch
deleted file mode 100644
index 4eea60617d..0000000000
--- a/target/linux/bcm47xx/patches-5.4/310-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
-@@ -168,30 +168,6 @@ 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)