Merge tag 'mips_6.8' of git://git.kernel.org/pub/scm/linux/kernel/git/mips/linux

Pull MIPS updates from Thomas Bogendoerfer:
 "Just cleanups and fixes"

* tag 'mips_6.8' of git://git.kernel.org/pub/scm/linux/kernel/git/mips/linux:
  MIPS: Alchemy: Fix an out-of-bound access in db1550_dev_setup()
  MIPS: Alchemy: Fix an out-of-bound access in db1200_dev_setup()
  MIPS: Fix typos
  MIPS: Remove unused shadow GPR support from vector irq setup
  MIPS: Allow vectored interrupt handler to reside everywhere for 64bit
  mips: Set dump-stack arch description
  mips: mm: add slab availability checking in ioremap_prot
  mips: Optimize max_mapnr init procedure
  mips: Fix max_mapnr being uninitialized on early stages
  mips: Fix incorrect max_low_pfn adjustment
  mips: dmi: Fix early remap on MIPS32
  MIPS: compressed: Use correct instruction for 64 bit code
  MIPS: SGI-IP27: hubio: fix nasid kernel-doc warning
  MAINTAINERS: Add myself as maintainer of the Ralink architecture

10 files changed, 44 insertions, 79 deletions

diff --git a/arch/mips/kernel/cpu-probe.c b/arch/mips/kernel/cpu-probe.c
index de7460c3a72e..bda7f193baab 100644
--- a/arch/mips/kernel/cpu-probe.c
+++ b/arch/mips/kernel/cpu-probe.c
@@ -1138,7 +1138,7 @@ static inline void cpu_probe_legacy(struct cpuinfo_mips *c, unsigned int cpu)
 		 * This processor doesn't have an MMU, so it's not
 		 * "real easy" to run Linux on it. It is left purely
 		 * for documentation.  Commented out because it shares
-		 * it's c0_prid id number with the TX3900.
+		 * its c0_prid id number with the TX3900.
 		 */
 		c->cputype = CPU_R4650;
 		__cpu_name[cpu] = "R4650";
diff --git a/arch/mips/kernel/genex.S b/arch/mips/kernel/genex.S
index b6de8e88c1bd..a572ce36a24f 100644
--- a/arch/mips/kernel/genex.S
+++ b/arch/mips/kernel/genex.S
@@ -272,18 +272,17 @@ NESTED(except_vec_vi, 0, sp)
 	.set	push
 	.set	noreorder
 	PTR_LA	v1, except_vec_vi_handler
-FEXPORT(except_vec_vi_lui)
-	lui	v0, 0		/* Patched */
 	jr	v1
 FEXPORT(except_vec_vi_ori)
-	 ori	v0, 0		/* Patched */
+	 ori	v0, zero, 0		/* Offset in vi_handlers[] */
 	.set	pop
 	END(except_vec_vi)
 EXPORT(except_vec_vi_end)
 
 /*
  * Common Vectored Interrupt code
- * Complete the register saves and invoke the handler which is passed in $v0
+ * Complete the register saves and invoke the handler, $v0 holds
+ * offset into vi_handlers[]
  */
 NESTED(except_vec_vi_handler, 0, sp)
 	SAVE_TEMP
@@ -331,6 +330,7 @@ NESTED(except_vec_vi_handler, 0, sp)
 	/* Save task's sp on IRQ stack so that unwinding can follow it */
 	LONG_S	s1, 0(sp)
 2:
+	PTR_L	v0, vi_handlers(v0)
 	jalr	v0
 
 	/* Restore sp */
diff --git a/arch/mips/kernel/kprobes.c b/arch/mips/kernel/kprobes.c
index 316b27d0d2fb..dc39f5b3fb83 100644
--- a/arch/mips/kernel/kprobes.c
+++ b/arch/mips/kernel/kprobes.c
@@ -55,7 +55,7 @@ NOKPROBE_SYMBOL(insn_has_delayslot);
  * one; putting breakpoint on top of atomic ll/sc pair is bad idea;
  * so we need to prevent it and refuse kprobes insertion for such
  * instructions; cannot do much about breakpoint in the middle of
- * ll/sc pair; it is upto user to avoid those places
+ * ll/sc pair; it is up to user to avoid those places
  */
 static int insn_has_ll_or_sc(union mips_instruction insn)
 {
diff --git a/arch/mips/kernel/prom.c b/arch/mips/kernel/prom.c
index f88ce78e13e3..6062e6fa589a 100644
--- a/arch/mips/kernel/prom.c
+++ b/arch/mips/kernel/prom.c
@@ -28,6 +28,8 @@ __init void mips_set_machine_name(const char *name)
 
 	strscpy(mips_machine_name, name, sizeof(mips_machine_name));
 	pr_info("MIPS: machine is %s\n", mips_get_machine_name());
+
+	dump_stack_set_arch_desc(name);
 }
 
 char *mips_get_machine_name(void)
diff --git a/arch/mips/kernel/relocate.c b/arch/mips/kernel/relocate.c
index 58fc8d089402..7eeeaf1ff95d 100644
--- a/arch/mips/kernel/relocate.c
+++ b/arch/mips/kernel/relocate.c
@@ -380,7 +380,7 @@ void *__init relocate_kernel(void)
 		}
 #endif /* CONFIG_USE_OF */
 
-		/* Copy the kernel to it's new location */
+		/* Copy the kernel to its new location */
 		memcpy(loc_new, &_text, kernel_length);
 
 		/* Perform relocations on the new kernel */
diff --git a/arch/mips/kernel/relocate_kernel.S b/arch/mips/kernel/relocate_kernel.S
index 8f0a7263a9d6..de894a0211d7 100644
--- a/arch/mips/kernel/relocate_kernel.S
+++ b/arch/mips/kernel/relocate_kernel.S
@@ -70,7 +70,7 @@ copy_word:
 done:
 #ifdef CONFIG_SMP
 	/* kexec_flag reset is signal to other CPUs what kernel
-	   was moved to it's location. Note - we need relocated address
+	   was moved to its location. Note - we need relocated address
 	   of kexec_flag.  */
 
 	bal		1f
diff --git a/arch/mips/kernel/setup.c b/arch/mips/kernel/setup.c
index 328426c3ed6f..9c30de151597 100644
--- a/arch/mips/kernel/setup.c
+++ b/arch/mips/kernel/setup.c
@@ -147,7 +147,7 @@ static unsigned long __init init_initrd(void)
 	/*
 	 * Board specific code or command line parser should have
 	 * already set up initrd_start and initrd_end. In these cases
-	 * perfom sanity checks and use them if all looks good.
+	 * perform sanity checks and use them if all looks good.
 	 */
 	if (!initrd_start || initrd_end <= initrd_start)
 		goto disable;
@@ -322,11 +322,11 @@ static void __init bootmem_init(void)
 		panic("Incorrect memory mapping !!!");
 
 	if (max_pfn > PFN_DOWN(HIGHMEM_START)) {
+		max_low_pfn = PFN_DOWN(HIGHMEM_START);
 #ifdef CONFIG_HIGHMEM
-		highstart_pfn = PFN_DOWN(HIGHMEM_START);
+		highstart_pfn = max_low_pfn;
 		highend_pfn = max_pfn;
 #else
-		max_low_pfn = PFN_DOWN(HIGHMEM_START);
 		max_pfn = max_low_pfn;
 #endif
 	}
diff --git a/arch/mips/kernel/signal.c b/arch/mips/kernel/signal.c
index ccbf580827f6..4a10f18a8806 100644
--- a/arch/mips/kernel/signal.c
+++ b/arch/mips/kernel/signal.c
@@ -570,7 +570,7 @@ void __user *get_sigframe(struct ksignal *ksig, struct pt_regs *regs,
 		return (void __user __force *)(-1UL);
 
 	/*
-	 * FPU emulator may have it's own trampoline active just
+	 * FPU emulator may have its own trampoline active just
 	 * above the user stack, 16-bytes before the next lowest
 	 * 16 byte boundary.  Try to avoid trashing it.
 	 */
diff --git a/arch/mips/kernel/traps.c b/arch/mips/kernel/traps.c
index c58c0c3c5b40..dec6878b35f6 100644
--- a/arch/mips/kernel/traps.c
+++ b/arch/mips/kernel/traps.c
@@ -2055,108 +2055,71 @@ static void do_default_vi(void)
 	panic("Caught unexpected vectored interrupt.");
 }
 
-static void *set_vi_srs_handler(int n, vi_handler_t addr, int srs)
+void *set_vi_handler(int n, vi_handler_t addr)
 {
+	extern const u8 except_vec_vi[];
+	extern const u8 except_vec_vi_ori[], except_vec_vi_end[];
+	extern const u8 rollback_except_vec_vi[];
 	unsigned long handler;
 	unsigned long old_handler = vi_handlers[n];
 	int srssets = current_cpu_data.srsets;
 	u16 *h;
 	unsigned char *b;
+	const u8 *vec_start;
+	int ori_offset;
+	int handler_len;
 
 	BUG_ON(!cpu_has_veic && !cpu_has_vint);
 
 	if (addr == NULL) {
 		handler = (unsigned long) do_default_vi;
-		srs = 0;
 	} else
 		handler = (unsigned long) addr;
 	vi_handlers[n] = handler;
 
 	b = (unsigned char *)(ebase + 0x200 + n*VECTORSPACING);
 
-	if (srs >= srssets)
-		panic("Shadow register set %d not supported", srs);
-
 	if (cpu_has_veic) {
 		if (board_bind_eic_interrupt)
-			board_bind_eic_interrupt(n, srs);
+			board_bind_eic_interrupt(n, 0);
 	} else if (cpu_has_vint) {
 		/* SRSMap is only defined if shadow sets are implemented */
 		if (srssets > 1)
-			change_c0_srsmap(0xf << n*4, srs << n*4);
+			change_c0_srsmap(0xf << n*4, 0 << n*4);
 	}
 
-	if (srs == 0) {
-		/*
-		 * If no shadow set is selected then use the default handler
-		 * that does normal register saving and standard interrupt exit
-		 */
-		extern const u8 except_vec_vi[], except_vec_vi_lui[];
-		extern const u8 except_vec_vi_ori[], except_vec_vi_end[];
-		extern const u8 rollback_except_vec_vi[];
-		const u8 *vec_start = using_rollback_handler() ?
-				      rollback_except_vec_vi : except_vec_vi;
+	vec_start = using_rollback_handler() ? rollback_except_vec_vi :
+					       except_vec_vi;
 #if defined(CONFIG_CPU_MICROMIPS) || defined(CONFIG_CPU_BIG_ENDIAN)
-		const int lui_offset = except_vec_vi_lui - vec_start + 2;
-		const int ori_offset = except_vec_vi_ori - vec_start + 2;
+	ori_offset = except_vec_vi_ori - vec_start + 2;
 #else
-		const int lui_offset = except_vec_vi_lui - vec_start;
-		const int ori_offset = except_vec_vi_ori - vec_start;
+	ori_offset = except_vec_vi_ori - vec_start;
 #endif
-		const int handler_len = except_vec_vi_end - vec_start;
-
-		if (handler_len > VECTORSPACING) {
-			/*
-			 * Sigh... panicing won't help as the console
-			 * is probably not configured :(
-			 */
-			panic("VECTORSPACING too small");
-		}
+	handler_len = except_vec_vi_end - vec_start;
 
-		set_handler(((unsigned long)b - ebase), vec_start,
-#ifdef CONFIG_CPU_MICROMIPS
-				(handler_len - 1));
-#else
-				handler_len);
-#endif
-		h = (u16 *)(b + lui_offset);
-		*h = (handler >> 16) & 0xffff;
-		h = (u16 *)(b + ori_offset);
-		*h = (handler & 0xffff);
-		local_flush_icache_range((unsigned long)b,
-					 (unsigned long)(b+handler_len));
-	}
-	else {
+	if (handler_len > VECTORSPACING) {
 		/*
-		 * In other cases jump directly to the interrupt handler. It
-		 * is the handler's responsibility to save registers if required
-		 * (eg hi/lo) and return from the exception using "eret".
+		 * Sigh... panicing won't help as the console
+		 * is probably not configured :(
 		 */
-		u32 insn;
+		panic("VECTORSPACING too small");
+	}
 
-		h = (u16 *)b;
-		/* j handler */
+	set_handler(((unsigned long)b - ebase), vec_start,
 #ifdef CONFIG_CPU_MICROMIPS
-		insn = 0xd4000000 | (((u32)handler & 0x07ffffff) >> 1);
+			(handler_len - 1));
 #else
-		insn = 0x08000000 | (((u32)handler & 0x0fffffff) >> 2);
+			handler_len);
 #endif
-		h[0] = (insn >> 16) & 0xffff;
-		h[1] = insn & 0xffff;
-		h[2] = 0;
-		h[3] = 0;
-		local_flush_icache_range((unsigned long)b,
-					 (unsigned long)(b+8));
-	}
+	/* insert offset into vi_handlers[] */
+	h = (u16 *)(b + ori_offset);
+	*h = n * sizeof(handler);
+	local_flush_icache_range((unsigned long)b,
+				 (unsigned long)(b+handler_len));
 
 	return (void *)old_handler;
 }
 
-void *set_vi_handler(int n, vi_handler_t addr)
-{
-	return set_vi_srs_handler(n, addr, 0);
-}
-
 /*
  * Timer interrupt
  */
@@ -2416,7 +2379,7 @@ void __init trap_init(void)
 		set_except_vector(i, handle_reserved);
 
 	/*
-	 * Copy the EJTAG debug exception vector handler code to it's final
+	 * Copy the EJTAG debug exception vector handler code to its final
 	 * destination.
 	 */
 	if (cpu_has_ejtag && board_ejtag_handler_setup)
diff --git a/arch/mips/kernel/vpe.c b/arch/mips/kernel/vpe.c
index e9a0cfd02ae2..737d0d4fdcd3 100644
--- a/arch/mips/kernel/vpe.c
+++ b/arch/mips/kernel/vpe.c
@@ -6,9 +6,9 @@
  * Copyright (C) 2004, 2005 MIPS Technologies, Inc.  All rights reserved.
  * Copyright (C) 2013 Imagination Technologies Ltd.
  *
- * VPE spport module for loading a MIPS SP program into VPE1. The SP
+ * VPE support module for loading a MIPS SP program into VPE1. The SP
  * environment is rather simple since there are no TLBs. It needs
- * to be relocatable (or partiall linked). Initialize your stack in
+ * to be relocatable (or partially linked). Initialize your stack in
  * the startup-code. The loader looks for the symbol __start and sets
  * up the execution to resume from there. To load and run, simply do
  * a cat SP 'binary' to the /dev/vpe1 device.