Merge tag 'parisc-for-6.5-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/deller/parisc-linux

Pull parisc architecture fixes from Helge Deller:

 - early fixmap preallocation to fix boot failures on kernel >= 6.4

 - remove DMA leftover code in parport_gsc

 - drop old comments and code style fixes

* tag 'parisc-for-6.5-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/deller/parisc-linux:
  parisc: unaligned: Add required spaces after ','
  parport: gsc: remove DMA leftover code
  parisc: pci-dma: remove unused and dead EISA code and comment
  parisc/mm: preallocate fixmap page tables at init

Author: torvalds

arch/parisc/kernel/pci-dma.c

@@ -417,14 +417,6 @@ void *arch_dma_alloc(struct device *dev, size_t size,
 	map_uncached_pages(vaddr, size, paddr);
 	*dma_handle = (dma_addr_t) paddr;
 
-#if 0
-/* This probably isn't needed to support EISA cards.
-** ISA cards will certainly only support 24-bit DMA addressing.
-** Not clear if we can, want, or need to support ISA.
-*/
-	if (!dev || *dev->coherent_dma_mask < 0xffffffff)
-		gfp |= GFP_DMA;
-#endif
 	return (void *)vaddr;
 }
 

arch/parisc/kernel/unaligned.c

@@ -337,7 +337,7 @@ static int emulate_std(struct pt_regs *regs, int frreg, int flop)
 	: "r19", "r20", "r21", "r22", "r1" );
 #else
     {
-	unsigned long valh=(val>>32),vall=(val&0xffffffffl);
+	unsigned long valh = (val >> 32), vall = (val & 0xffffffffl);
 	__asm__ __volatile__ (
 "	mtsp	%4, %%sr1\n"
 "	zdep	%2, 29, 2, %%r19\n"
@@ -473,7 +473,7 @@ void handle_unaligned(struct pt_regs *regs)
 	case OPCODE_LDWA_I:
 	case OPCODE_LDW_S:
 	case OPCODE_LDWA_S:
-		ret = emulate_ldw(regs, R3(regs->iir),0);
+		ret = emulate_ldw(regs, R3(regs->iir), 0);
 		break;
 
 	case OPCODE_STH:
@@ -482,45 +482,45 @@ void handle_unaligned(struct pt_regs *regs)
 
 	case OPCODE_STW:
 	case OPCODE_STWA:
-		ret = emulate_stw(regs, R2(regs->iir),0);
+		ret = emulate_stw(regs, R2(regs->iir), 0);
 		break;
 
 #ifdef CONFIG_64BIT
 	case OPCODE_LDD_I:
 	case OPCODE_LDDA_I:
 	case OPCODE_LDD_S:
 	case OPCODE_LDDA_S:
-		ret = emulate_ldd(regs, R3(regs->iir),0);
+		ret = emulate_ldd(regs, R3(regs->iir), 0);
 		break;
 
 	case OPCODE_STD:
 	case OPCODE_STDA:
-		ret = emulate_std(regs, R2(regs->iir),0);
+		ret = emulate_std(regs, R2(regs->iir), 0);
 		break;
 #endif
 
 	case OPCODE_FLDWX:
 	case OPCODE_FLDWS:
 	case OPCODE_FLDWXR:
 	case OPCODE_FLDWSR:
-		ret = emulate_ldw(regs,FR3(regs->iir),1);
+		ret = emulate_ldw(regs, FR3(regs->iir), 1);
 		break;
 
 	case OPCODE_FLDDX:
 	case OPCODE_FLDDS:
-		ret = emulate_ldd(regs,R3(regs->iir),1);
+		ret = emulate_ldd(regs, R3(regs->iir), 1);
 		break;
 
 	case OPCODE_FSTWX:
 	case OPCODE_FSTWS:
 	case OPCODE_FSTWXR:
 	case OPCODE_FSTWSR:
-		ret = emulate_stw(regs,FR3(regs->iir),1);
+		ret = emulate_stw(regs, FR3(regs->iir), 1);
 		break;
 
 	case OPCODE_FSTDX:
 	case OPCODE_FSTDS:
-		ret = emulate_std(regs,R3(regs->iir),1);
+		ret = emulate_std(regs, R3(regs->iir), 1);
 		break;
 
 	case OPCODE_LDCD_I:

arch/parisc/mm/fixmap.c

@@ -19,9 +19,6 @@ void notrace set_fixmap(enum fixed_addresses idx, phys_addr_t phys)
 	pmd_t *pmd = pmd_offset(pud, vaddr);
 	pte_t *pte;
 
-	if (pmd_none(*pmd))
-		pte = pte_alloc_kernel(pmd, vaddr);
-
 	pte = pte_offset_kernel(pmd, vaddr);
 	set_pte_at(&init_mm, vaddr, pte, __mk_pte(phys, PAGE_KERNEL_RWX));
 	flush_tlb_kernel_range(vaddr, vaddr + PAGE_SIZE);

arch/parisc/mm/init.c

@@ -669,6 +669,39 @@ static void __init gateway_init(void)
 		  PAGE_SIZE, PAGE_GATEWAY, 1);
 }
 
+static void __init fixmap_init(void)
+{
+	unsigned long addr = FIXMAP_START;
+	unsigned long end = FIXMAP_START + FIXMAP_SIZE;
+	pgd_t *pgd = pgd_offset_k(addr);
+	p4d_t *p4d = p4d_offset(pgd, addr);
+	pud_t *pud = pud_offset(p4d, addr);
+	pmd_t *pmd;
+
+	BUILD_BUG_ON(FIXMAP_SIZE > PMD_SIZE);
+
+#if CONFIG_PGTABLE_LEVELS == 3
+	if (pud_none(*pud)) {
+		pmd = memblock_alloc(PAGE_SIZE << PMD_TABLE_ORDER,
+				     PAGE_SIZE << PMD_TABLE_ORDER);
+		if (!pmd)
+			panic("fixmap: pmd allocation failed.\n");
+		pud_populate(NULL, pud, pmd);
+	}
+#endif
+
+	pmd = pmd_offset(pud, addr);
+	do {
+		pte_t *pte = memblock_alloc(PAGE_SIZE, PAGE_SIZE);
+		if (!pte)
+			panic("fixmap: pte allocation failed.\n");
+
+		pmd_populate_kernel(&init_mm, pmd, pte);
+
+		addr += PAGE_SIZE;
+	} while (addr < end);
+}
+
 static void __init parisc_bootmem_free(void)
 {
 	unsigned long max_zone_pfn[MAX_NR_ZONES] = { 0, };
@@ -683,6 +716,7 @@ void __init paging_init(void)
 	setup_bootmem();
 	pagetable_init();
 	gateway_init();
+	fixmap_init();
 	flush_cache_all_local(); /* start with known state */
 	flush_tlb_all_local(NULL);
 

drivers/parport/parport_gsc.c

@@ -28,7 +28,6 @@
 #include <linux/sysctl.h>
 
 #include <asm/io.h>
-#include <asm/dma.h>
 #include <linux/uaccess.h>
 #include <asm/superio.h>
 
@@ -226,9 +225,9 @@ static int parport_PS2_supported(struct parport *pb)
 
 /* --- Initialisation code -------------------------------- */
 
-struct parport *parport_gsc_probe_port(unsigned long base,
+static struct parport *parport_gsc_probe_port(unsigned long base,
 				       unsigned long base_hi, int irq,
-				       int dma, struct parisc_device *padev)
+				       struct parisc_device *padev)
 {
 	struct parport_gsc_private *priv;
 	struct parport_operations *ops;
@@ -250,12 +249,9 @@ struct parport *parport_gsc_probe_port(unsigned long base,
 	}
 	priv->ctr = 0xc;
 	priv->ctr_writable = 0xff;
-	priv->dma_buf = NULL;
-	priv->dma_handle = 0;
 	p->base = base;
 	p->base_hi = base_hi;
 	p->irq = irq;
-	p->dma = dma;
 	p->modes = PARPORT_MODE_PCSPP | PARPORT_MODE_SAFEININT;
 	p->ops = ops;
 	p->private_data = priv;
@@ -286,17 +282,9 @@ struct parport *parport_gsc_probe_port(unsigned long base,
 	if (p->irq == PARPORT_IRQ_AUTO) {
 		p->irq = PARPORT_IRQ_NONE;
 	}
-	if (p->irq != PARPORT_IRQ_NONE) {
+	if (p->irq != PARPORT_IRQ_NONE)
 		pr_cont(", irq %d", p->irq);
 
-		if (p->dma == PARPORT_DMA_AUTO) {
-			p->dma = PARPORT_DMA_NONE;
-		}
-	}
-	if (p->dma == PARPORT_DMA_AUTO) /* To use DMA, giving the irq
-                                           is mandatory (see above) */
-		p->dma = PARPORT_DMA_NONE;
-
 	pr_cont(" [");
 #define printmode(x)							\
 do {									\
@@ -321,7 +309,6 @@ do {									\
 			pr_warn("%s: irq %d in use, resorting to polled operation\n",
 				p->name, p->irq);
 			p->irq = PARPORT_IRQ_NONE;
-			p->dma = PARPORT_DMA_NONE;
 		}
 	}
 
@@ -369,8 +356,7 @@ static int __init parport_init_chip(struct parisc_device *dev)
 		pr_info("%s: enhanced parport-modes not supported\n", __func__);
 	}
 
-	p = parport_gsc_probe_port(port, 0, dev->irq,
-			/* PARPORT_IRQ_NONE */ PARPORT_DMA_NONE, dev);
+	p = parport_gsc_probe_port(port, 0, dev->irq, dev);
 	if (p)
 		parport_count++;
 	dev_set_drvdata(&dev->dev, p);
@@ -382,16 +368,10 @@ static void __exit parport_remove_chip(struct parisc_device *dev)
 {
 	struct parport *p = dev_get_drvdata(&dev->dev);
 	if (p) {
-		struct parport_gsc_private *priv = p->private_data;
 		struct parport_operations *ops = p->ops;
 		parport_remove_port(p);
-		if (p->dma != PARPORT_DMA_NONE)
-			free_dma(p->dma);
 		if (p->irq != PARPORT_IRQ_NONE)
 			free_irq(p->irq, p);
-		if (priv->dma_buf)
-			dma_free_coherent(&priv->dev->dev, PAGE_SIZE,
-					  priv->dma_buf, priv->dma_handle);
 		kfree (p->private_data);
 		parport_put_port(p);
 		kfree (ops); /* hope no-one cached it */

drivers/parport/parport_gsc.h

@@ -63,8 +63,6 @@ struct parport_gsc_private {
 	int writeIntrThreshold;
 
 	/* buffer suitable for DMA, if DMA enabled */
-	char *dma_buf;
-	dma_addr_t dma_handle;
 	struct pci_dev *dev;
 };
 
@@ -199,9 +197,4 @@ extern void parport_gsc_inc_use_count(void);
 
 extern void parport_gsc_dec_use_count(void);
 
-extern struct parport *parport_gsc_probe_port(unsigned long base,
-						unsigned long base_hi,
-						int irq, int dma,
-						struct parisc_device *padev);
-
 #endif	/* __DRIVERS_PARPORT_PARPORT_GSC_H */