A few more MIPS fixes:

- Fix 16b cmpxchg() operations which could erroneously fail if bits 15:8
   of the old value are non-zero. In practice I'm not aware of any actual
   users of 16b cmpxchg() on MIPS, but this fixes the support for it was
   was introduced in v4.13.
 
 - Provide a struct device to dma_alloc_coherent for Lantiq XWAY systems
   with a "Voice MIPS Macro Core" (VMMC) device.
 
 - Provide DMA masks for BCM63xx ethernet devices, fixing a regression
   introduced in v4.19.
 
 - Fix memblock reservation for the kernel when the system has a non-zero
   PHYS_OFFSET, correcting the memblock conversion performed in v4.20.
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Merge tag 'mips_fixes_5.0_4' of git://git.kernel.org/pub/scm/linux/kernel/git/mips/linux

Pull MIPS fixes from Paul Burton:
 "A few more MIPS fixes:

   - Fix 16b cmpxchg() operations which could erroneously fail if bits
     15:8 of the old value are non-zero. In practice I'm not aware of
     any actual users of 16b cmpxchg() on MIPS, but this fixes the
     support for it was was introduced in v4.13.

   - Provide a struct device to dma_alloc_coherent for Lantiq XWAY
     systems with a "Voice MIPS Macro Core" (VMMC) device.

   - Provide DMA masks for BCM63xx ethernet devices, fixing a regression
     introduced in v4.19.

   - Fix memblock reservation for the kernel when the system has a
     non-zero PHYS_OFFSET, correcting the memblock conversion performed
     in v4.20"

* tag 'mips_fixes_5.0_4' of git://git.kernel.org/pub/scm/linux/kernel/git/mips/linux:
  MIPS: fix memory setup for platforms with PHYS_OFFSET != 0
  MIPS: BCM63XX: provide DMA masks for ethernet devices
  MIPS: lantiq: pass struct device to DMA API functions
  MIPS: fix truncation in __cmpxchg_small for short values

arch/mips/bcm63xx/dev-enet.c

@@ -70,6 +70,8 @@ static struct platform_device bcm63xx_enet_shared_device = {
 
 static int shared_device_registered;
 
+static u64 enet_dmamask = DMA_BIT_MASK(32);
+
 static struct resource enet0_res[] = {
 	{
 		.start		= -1, /* filled at runtime */
@@ -99,6 +101,8 @@ static struct platform_device bcm63xx_enet0_device = {
 	.resource	= enet0_res,
 	.dev		= {
 		.platform_data = &enet0_pd,
+		.dma_mask = &enet_dmamask,
+		.coherent_dma_mask = DMA_BIT_MASK(32),
 	},
 };
 
@@ -131,6 +135,8 @@ static struct platform_device bcm63xx_enet1_device = {
 	.resource	= enet1_res,
 	.dev		= {
 		.platform_data = &enet1_pd,
+		.dma_mask = &enet_dmamask,
+		.coherent_dma_mask = DMA_BIT_MASK(32),
 	},
 };
 
@@ -157,6 +163,8 @@ static struct platform_device bcm63xx_enetsw_device = {
 	.resource	= enetsw_res,
 	.dev		= {
 		.platform_data = &enetsw_pd,
+		.dma_mask = &enet_dmamask,
+		.coherent_dma_mask = DMA_BIT_MASK(32),
 	},
 };
 

arch/mips/kernel/cmpxchg.c

@@ -54,10 +54,9 @@ unsigned long __xchg_small(volatile void *ptr, unsigned long val, unsigned int s
 unsigned long __cmpxchg_small(volatile void *ptr, unsigned long old,
 			      unsigned long new, unsigned int size)
 {
-	u32 mask, old32, new32, load32;
+	u32 mask, old32, new32, load32, load;
 	volatile u32 *ptr32;
 	unsigned int shift;
-	u8 load;
 
 	/* Check that ptr is naturally aligned */
 	WARN_ON((unsigned long)ptr & (size - 1));

arch/mips/kernel/setup.c

@@ -384,7 +384,8 @@ static void __init bootmem_init(void)
 	init_initrd();
 	reserved_end = (unsigned long) PFN_UP(__pa_symbol(&_end));
 
-	memblock_reserve(PHYS_OFFSET, reserved_end << PAGE_SHIFT);
+	memblock_reserve(PHYS_OFFSET,
+			 (reserved_end << PAGE_SHIFT) - PHYS_OFFSET);
 
 	/*
 	 * max_low_pfn is not a number of pages. The number of pages

arch/mips/lantiq/xway/vmmc.c

@@ -31,8 +31,8 @@ static int vmmc_probe(struct platform_device *pdev)
 	dma_addr_t dma;
 
 	cp1_base =
-		(void *) CPHYSADDR(dma_alloc_coherent(NULL, CP1_SIZE,
-						    &dma, GFP_ATOMIC));
+		(void *) CPHYSADDR(dma_alloc_coherent(&pdev->dev, CP1_SIZE,
+						    &dma, GFP_KERNEL));
 
 	gpio_count = of_gpio_count(pdev->dev.of_node);
 	while (gpio_count > 0) {