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

7 files changed, 19 insertions, 13 deletions

diff --git a/arch/mips/mm/c-r4k.c b/arch/mips/mm/c-r4k.c
index b45bf026ee55..10413b6f6662 100644
--- a/arch/mips/mm/c-r4k.c
+++ b/arch/mips/mm/c-r4k.c
@@ -1650,7 +1650,7 @@ static void coherency_setup(void)
 
 	/*
 	 * c0_status.cu=0 specifies that updates by the sc instruction use
-	 * the coherency mode specified by the TLB; 1 means cachable
+	 * the coherency mode specified by the TLB; 1 means cacheable
 	 * coherent update on write will be used.  Not all processors have
 	 * this bit and; some wire it to zero, others like Toshiba had the
 	 * silly idea of putting something else there ...
diff --git a/arch/mips/mm/cex-gen.S b/arch/mips/mm/cex-gen.S
index 45dff5cd4b8e..e528583d1331 100644
--- a/arch/mips/mm/cex-gen.S
+++ b/arch/mips/mm/cex-gen.S
@@ -25,7 +25,7 @@
 	 * This is a very bad place to be.  Our cache error
 	 * detection has triggered.  If we have write-back data
 	 * in the cache, we may not be able to recover.	 As a
-	 * first-order desperate measure, turn off KSEG0 cacheing.
+	 * first-order desperate measure, turn off KSEG0 caching.
 	 */
 	mfc0	k0,CP0_CONFIG
 	li	k1,~CONF_CM_CMASK
diff --git a/arch/mips/mm/init.c b/arch/mips/mm/init.c
index c2e0e5aebe90..39f129205b0c 100644
--- a/arch/mips/mm/init.c
+++ b/arch/mips/mm/init.c
@@ -422,8 +422,17 @@ void __init paging_init(void)
 		       " %ldk highmem ignored\n",
 		       (highend_pfn - max_low_pfn) << (PAGE_SHIFT - 10));
 		max_zone_pfns[ZONE_HIGHMEM] = max_low_pfn;
+
+		max_mapnr = max_low_pfn;
+	} else if (highend_pfn) {
+		max_mapnr = highend_pfn;
+	} else {
+		max_mapnr = max_low_pfn;
 	}
+#else
+	max_mapnr = max_low_pfn;
 #endif
+	high_memory = (void *) __va(max_low_pfn << PAGE_SHIFT);
 
 	free_area_init(max_zone_pfns);
 }
@@ -459,13 +468,6 @@ void __init mem_init(void)
 	 */
 	BUILD_BUG_ON(IS_ENABLED(CONFIG_32BIT) && (PFN_PTE_SHIFT > PAGE_SHIFT));
 
-#ifdef CONFIG_HIGHMEM
-	max_mapnr = highend_pfn ? highend_pfn : max_low_pfn;
-#else
-	max_mapnr = max_low_pfn;
-#endif
-	high_memory = (void *) __va(max_low_pfn << PAGE_SHIFT);
-
 	maar_init();
 	memblock_free_all();
 	setup_zero_pages();	/* Setup zeroed pages.  */
diff --git a/arch/mips/mm/ioremap.c b/arch/mips/mm/ioremap.c
index b6dad2fd5575..d8243d61ef32 100644
--- a/arch/mips/mm/ioremap.c
+++ b/arch/mips/mm/ioremap.c
@@ -72,6 +72,10 @@ void __iomem *ioremap_prot(phys_addr_t phys_addr, unsigned long size,
 	    flags == _CACHE_UNCACHED)
 		return (void __iomem *) CKSEG1ADDR(phys_addr);
 
+	/* Early remaps should use the unmapped regions til' VM is available */
+	if (WARN_ON_ONCE(!slab_is_available()))
+		return NULL;
+
 	/*
 	 * Don't allow anybody to remap RAM that may be allocated by the page
 	 * allocator, since that could lead to races & data clobbering.
diff --git a/arch/mips/mm/tlb-r3k.c b/arch/mips/mm/tlb-r3k.c
index f6db65410c65..173f7b36033b 100644
--- a/arch/mips/mm/tlb-r3k.c
+++ b/arch/mips/mm/tlb-r3k.c
@@ -183,7 +183,7 @@ void __update_tlb(struct vm_area_struct *vma, unsigned long address, pte_t pte)
 	int idx, pid;
 
 	/*
-	 * Handle debugger faulting in for debugee.
+	 * Handle debugger faulting in for debuggee.
 	 */
 	if (current->active_mm != vma->vm_mm)
 		return;
diff --git a/arch/mips/mm/tlb-r4k.c b/arch/mips/mm/tlb-r4k.c
index 7e2a0011a6fb..4106084e57d7 100644
--- a/arch/mips/mm/tlb-r4k.c
+++ b/arch/mips/mm/tlb-r4k.c
@@ -301,7 +301,7 @@ void __update_tlb(struct vm_area_struct * vma, unsigned long address, pte_t pte)
 	int idx, pid;
 
 	/*
-	 * Handle debugger faulting in for debugee.
+	 * Handle debugger faulting in for debuggee.
 	 */
 	if (current->active_mm != vma->vm_mm)
 		return;
diff --git a/arch/mips/mm/tlbex.c b/arch/mips/mm/tlbex.c
index b4e1c783e617..4017fa0e2f68 100644
--- a/arch/mips/mm/tlbex.c
+++ b/arch/mips/mm/tlbex.c
@@ -789,7 +789,7 @@ void build_get_pmde64(u32 **p, struct uasm_label **l, struct uasm_reloc **r,
 
 	if (check_for_high_segbits) {
 		/*
-		 * The kernel currently implicitely assumes that the
+		 * The kernel currently implicitly assumes that the
 		 * MIPS SEGBITS parameter for the processor is
 		 * (PGDIR_SHIFT+PGDIR_BITS) or less, and will never
 		 * allocate virtual addresses outside the maximum
@@ -1715,7 +1715,7 @@ iPTE_SW(u32 **p, struct uasm_reloc **r, unsigned int pte, unsigned int ptr,
 /*
  * Check if PTE is present, if not then jump to LABEL. PTR points to
  * the page table where this PTE is located, PTE will be re-loaded
- * with it's original value.
+ * with its original value.
  */
 static void
 build_pte_present(u32 **p, struct uasm_reloc **r,