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>
(cherry picked from commit 3a14580411adfb75f9a44eded9f41245b9e44606)

1 files changed, 0 insertions, 134 deletions

diff --git a/target/linux/generic/backport-5.4/300-MIPS-Exclude-more-dsemul-code-when-CONFIG_MIPS_FP_SU.patch b/target/linux/generic/backport-5.4/300-MIPS-Exclude-more-dsemul-code-when-CONFIG_MIPS_FP_SU.patch
deleted file mode 100644
index 0bc58e756b..0000000000
--- a/target/linux/generic/backport-5.4/300-MIPS-Exclude-more-dsemul-code-when-CONFIG_MIPS_FP_SU.patch
+++ /dev/null
@@ -1,134 +0,0 @@
-From d96c3157f9ca177727fbad960fcf6f52f145f471 Mon Sep 17 00:00:00 2001
-From: Yousong Zhou <yszhou4tech@gmail.com>
-Date: Thu, 9 Jan 2020 11:33:19 +0800
-Subject: [PATCH] MIPS: Exclude more dsemul code when CONFIG_MIPS_FP_SUPPORT=n
-
-This furthers what commit 42b10815d559 ("MIPS: Don't compile math-emu
-when CONFIG_MIPS_FP_SUPPORT=n") has done
-
-Signed-off-by: Yousong Zhou <yszhou4tech@gmail.com>
----
- arch/mips/include/asm/processor.h | 12 ++++++------
- arch/mips/kernel/process.c        | 10 ++++++++--
- arch/mips/kernel/vdso.c           | 26 +++++++++++++++-----------
- 3 files changed, 29 insertions(+), 19 deletions(-)
-
---- a/arch/mips/include/asm/processor.h
-+++ b/arch/mips/include/asm/processor.h
-@@ -253,13 +253,13 @@ struct thread_struct {
- #ifdef CONFIG_MIPS_FP_SUPPORT
- 	/* Saved fpu/fpu emulator stuff. */
- 	struct mips_fpu_struct fpu FPU_ALIGN;
--#endif
- 	/* Assigned branch delay slot 'emulation' frame */
- 	atomic_t bd_emu_frame;
- 	/* PC of the branch from a branch delay slot 'emulation' */
- 	unsigned long bd_emu_branch_pc;
- 	/* PC to continue from following a branch delay slot 'emulation' */
- 	unsigned long bd_emu_cont_pc;
-+#endif
- #ifdef CONFIG_MIPS_MT_FPAFF
- 	/* Emulated instruction count */
- 	unsigned long emulated_fp;
-@@ -302,7 +302,11 @@ struct thread_struct {
- 		.fpr		= {{{0,},},},			\
- 		.fcr31		= 0,				\
- 		.msacsr		= 0,				\
--	},
-+	},							\
-+	/* Delay slot emulation */				\
-+	.bd_emu_frame = ATOMIC_INIT(BD_EMUFRAME_NONE),		\
-+	.bd_emu_branch_pc = 0,					\
-+	.bd_emu_cont_pc = 0,
- #else
- # define FPU_INIT
- #endif
-@@ -334,10 +338,6 @@ struct thread_struct {
- 	 * FPU affinity state (null if not FPAFF)		\
- 	 */							\
- 	FPAFF_INIT						\
--	/* Delay slot emulation */				\
--	.bd_emu_frame = ATOMIC_INIT(BD_EMUFRAME_NONE),		\
--	.bd_emu_branch_pc = 0,					\
--	.bd_emu_cont_pc = 0,					\
- 	/*							\
- 	 * Saved DSP stuff					\
- 	 */							\
---- a/arch/mips/kernel/process.c
-+++ b/arch/mips/kernel/process.c
-@@ -75,7 +75,9 @@ void start_thread(struct pt_regs * regs,
- 	lose_fpu(0);
- 	clear_thread_flag(TIF_MSA_CTX_LIVE);
- 	clear_used_math();
-+#ifdef CONFIG_MIPS_FP_SUPPORT
- 	atomic_set(&current->thread.bd_emu_frame, BD_EMUFRAME_NONE);
-+#endif
- 	init_dsp();
- 	regs->cp0_epc = pc;
- 	regs->regs[29] = sp;
-@@ -176,7 +178,9 @@ int copy_thread_tls(unsigned long clone_
- 	clear_tsk_thread_flag(p, TIF_FPUBOUND);
- #endif /* CONFIG_MIPS_MT_FPAFF */
- 
-+#ifdef CONFIG_MIPS_FP_SUPPORT
- 	atomic_set(&p->thread.bd_emu_frame, BD_EMUFRAME_NONE);
-+#endif
- 
- 	if (clone_flags & CLONE_SETTLS)
- 		ti->tp_value = tls;
-@@ -650,8 +654,10 @@ unsigned long mips_stack_top(void)
- {
- 	unsigned long top = TASK_SIZE & PAGE_MASK;
- 
--	/* One page for branch delay slot "emulation" */
--	top -= PAGE_SIZE;
-+	if (IS_ENABLED(CONFIG_MIPS_FP_SUPPORT)) {
-+		/* One page for branch delay slot "emulation" */
-+		top -= PAGE_SIZE;
-+	}
- 
- 	/* Space for the VDSO, data page & GIC user page */
- 	top -= PAGE_ALIGN(current->thread.abi->vdso->size);
---- a/arch/mips/kernel/vdso.c
-+++ b/arch/mips/kernel/vdso.c
-@@ -71,10 +71,12 @@ subsys_initcall(init_vdso);
- 
- static unsigned long vdso_base(void)
- {
--	unsigned long base;
-+	unsigned long base = STACK_TOP;
- 
--	/* Skip the delay slot emulation page */
--	base = STACK_TOP + PAGE_SIZE;
-+	if (IS_ENABLED(CONFIG_MIPS_FP_SUPPORT)) {
-+		/* Skip the delay slot emulation page */
-+		base += PAGE_SIZE;
-+	}
- 
- 	if (current->flags & PF_RANDOMIZE) {
- 		base += get_random_int() & (VDSO_RANDOMIZE_SIZE - 1);
-@@ -95,14 +97,16 @@ int arch_setup_additional_pages(struct l
- 	if (down_write_killable(&mm->mmap_sem))
- 		return -EINTR;
- 
--	/* Map delay slot emulation page */
--	base = mmap_region(NULL, STACK_TOP, PAGE_SIZE,
--			   VM_READ | VM_EXEC |
--			   VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC,
--			   0, NULL);
--	if (IS_ERR_VALUE(base)) {
--		ret = base;
--		goto out;
-+	if (IS_ENABLED(CONFIG_MIPS_FP_SUPPORT)) {
-+		/* Map delay slot emulation page */
-+		base = mmap_region(NULL, STACK_TOP, PAGE_SIZE,
-+				VM_READ | VM_EXEC |
-+				VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC,
-+				0, NULL);
-+		if (IS_ERR_VALUE(base)) {
-+			ret = base;
-+			goto out;
-+		}
- 	}
- 
- 	/*