Merge branch 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus

Pull MIPS updates from Ralf Baechle:
 "A fair number of fixes all across arch/mips.  Nothing really stands
  out though APRP, the FPU code and syscall tracing code received
  multiple patches those all were small"

* 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus:
  MIPS: mark O32+FP64 experimental for now
  MIPS: ftrace: Fix icache flush range error
  MIPS: Fix syscall tracing interface
  MIPS: asm: syscall: Fix copying system call arguments
  MIPS: Octeon: Fix fall through on bar type OCTEON_DMA_BAR_TYPE_SMALL
  MIPS: FPU: Fix conflict of register usage
  MIPS: Replace CONFIG_MIPS64 and CONFIG_MIPS32_R2
  MIPS: math-emu: Fix prefx detection and COP1X function field definition
  MIPS: APRP: Choose the correct VPE loader by fixing the linking
  MIPS: APRP: Unregister rtlx interrupt hook at module exit
  MIPS: APRP: Fix the linking of rtlx interrupt hook
  MIPS: bcm47xx: Include missing errno.h for ENXIO
  MIPS: Alchemy: Fix unchecked kstrtoul return value
  MIPS: Fix randconfig build error.

arch/mips/Kconfig

@@ -2353,9 +2353,8 @@ config SECCOMP
 	  If unsure, say Y. Only embedded should say N here.
 
 config MIPS_O32_FP64_SUPPORT
-	bool "Support for O32 binaries using 64-bit FP"
+	bool "Support for O32 binaries using 64-bit FP (EXPERIMENTAL)"
 	depends on 32BIT || MIPS32_O32
-	default y
 	help
 	  When this is enabled, the kernel will support use of 64-bit floating
 	  point registers with binaries using the O32 ABI along with the
@@ -2367,7 +2366,14 @@ config MIPS_O32_FP64_SUPPORT
 	  of your kernel & potentially improve FP emulation performance by
 	  saying N here.
 
-	  If unsure, say Y.
+	  Although binutils currently supports use of this flag the details
+	  concerning its effect upon the O32 ABI in userland are still being
+	  worked on. In order to avoid userland becoming dependant upon current
+	  behaviour before the details have been finalised, this option should
+	  be considered experimental and only enabled by those working upon
+	  said details.
+
+	  If unsure, say N.
 
 config USE_OF
 	bool

arch/mips/alchemy/board-gpr.c

@@ -53,10 +53,8 @@ void __init prom_init(void)
 	prom_init_cmdline();
 
 	memsize_str = prom_getenv("memsize");
-	if (!memsize_str)
+	if (!memsize_str || kstrtoul(memsize_str, 0, &memsize))
 		memsize = 0x04000000;
-	else
-		strict_strtoul(memsize_str, 0, &memsize);
 	add_memory_region(0, memsize, BOOT_MEM_RAM);
 }
 

arch/mips/alchemy/board-mtx1.c

@@ -52,10 +52,8 @@ void __init prom_init(void)
 	prom_init_cmdline();
 
 	memsize_str = prom_getenv("memsize");
-	if (!memsize_str)
+	if (!memsize_str || kstrtoul(memsize_str, 0, &memsize))
 		memsize = 0x04000000;
-	else
-		strict_strtoul(memsize_str, 0, &memsize);
 	add_memory_region(0, memsize, BOOT_MEM_RAM);
 }
 

arch/mips/bcm47xx/board.c

+#include <linux/errno.h>
 #include <linux/export.h>
 #include <linux/string.h>
 #include <bcm47xx_board.h>

arch/mips/include/asm/asmmacro.h

@@ -106,7 +106,7 @@
 	.endm
 
 	.macro	fpu_save_double thread status tmp
-#if defined(CONFIG_MIPS64) || defined(CONFIG_CPU_MIPS32_R2)
+#if defined(CONFIG_64BIT) || defined(CONFIG_CPU_MIPS32_R2)
 	sll	\tmp, \status, 5
 	bgez	\tmp, 10f
 	fpu_save_16odd \thread
@@ -159,7 +159,7 @@
 	.endm
 
 	.macro	fpu_restore_double thread status tmp
-#if defined(CONFIG_MIPS64) || defined(CONFIG_CPU_MIPS32_R2)
+#if defined(CONFIG_64BIT) || defined(CONFIG_CPU_MIPS32_R2)
 	sll	\tmp, \status, 5
 	bgez	\tmp, 10f				# 16 register mode?
 

arch/mips/include/asm/fpu.h

@@ -57,7 +57,7 @@ static inline int __enable_fpu(enum fpu_mode mode)
 		return 0;
 
 	case FPU_64BIT:
-#if !(defined(CONFIG_CPU_MIPS32_R2) || defined(CONFIG_MIPS64))
+#if !(defined(CONFIG_CPU_MIPS32_R2) || defined(CONFIG_64BIT))
 		/* we only have a 32-bit FPU */
 		return SIGFPE;
 #endif

arch/mips/include/asm/syscall.h

@@ -13,6 +13,7 @@
 #ifndef __ASM_MIPS_SYSCALL_H
 #define __ASM_MIPS_SYSCALL_H
 
+#include <linux/compiler.h>
 #include <linux/audit.h>
 #include <linux/elf-em.h>
 #include <linux/kernel.h>
@@ -39,14 +40,14 @@ static inline unsigned long mips_get_syscall_arg(unsigned long *arg,
 
 #ifdef CONFIG_32BIT
 	case 4: case 5: case 6: case 7:
-		return get_user(*arg, (int *)usp + 4 * n);
+		return get_user(*arg, (int *)usp + n);
 #endif
 
 #ifdef CONFIG_64BIT
 	case 4: case 5: case 6: case 7:
 #ifdef CONFIG_MIPS32_O32
 		if (test_thread_flag(TIF_32BIT_REGS))
-			return get_user(*arg, (int *)usp + 4 * n);
+			return get_user(*arg, (int *)usp + n);
 		else
 #endif
 			*arg = regs->regs[4 + n];
@@ -57,6 +58,8 @@ static inline unsigned long mips_get_syscall_arg(unsigned long *arg,
 	default:
 		BUG();
 	}
+
+	unreachable();
 }
 
 static inline long syscall_get_return_value(struct task_struct *task,
@@ -83,11 +86,10 @@ static inline void syscall_get_arguments(struct task_struct *task,
 					 unsigned int i, unsigned int n,
 					 unsigned long *args)
 {
-	unsigned long arg;
 	int ret;
 
 	while (n--)
-		ret |= mips_get_syscall_arg(&arg, task, regs, i++);
+		ret |= mips_get_syscall_arg(args++, task, regs, i++);
 
 	/*
 	 * No way to communicate an error because this is a void function.

arch/mips/include/uapi/asm/inst.h

@@ -163,8 +163,8 @@ enum cop1_sdw_func {
  */
 enum cop1x_func {
 	lwxc1_op     =	0x00, ldxc1_op	   =  0x01,
-	pfetch_op    =	0x07, swxc1_op	   =  0x08,
-	sdxc1_op     =	0x09, madd_s_op	   =  0x20,
+	swxc1_op     =  0x08, sdxc1_op	   =  0x09,
+	pfetch_op    =	0x0f, madd_s_op	   =  0x20,
 	madd_d_op    =	0x21, madd_e_op	   =  0x22,
 	msub_s_op    =	0x28, msub_d_op	   =  0x29,
 	msub_e_op    =	0x2a, nmadd_s_op   =  0x30,

arch/mips/kernel/ftrace.c

@@ -111,11 +111,10 @@ static int ftrace_modify_code_2(unsigned long ip, unsigned int new_code1,
 	safe_store_code(new_code1, ip, faulted);
 	if (unlikely(faulted))
 		return -EFAULT;
-	ip += 4;
-	safe_store_code(new_code2, ip, faulted);
+	safe_store_code(new_code2, ip + 4, faulted);
 	if (unlikely(faulted))
 		return -EFAULT;
-	flush_icache_range(ip, ip + 8); /* original ip + 12 */
+	flush_icache_range(ip, ip + 8);
 	return 0;
 }
 #endif

arch/mips/kernel/r4k_fpu.S

@@ -35,9 +35,9 @@
 LEAF(_save_fp_context)
 	cfc1	t1, fcr31
 
-#if defined(CONFIG_64BIT) || defined(CONFIG_MIPS32_R2)
+#if defined(CONFIG_64BIT) || defined(CONFIG_CPU_MIPS32_R2)
 	.set	push
-#ifdef CONFIG_MIPS32_R2
+#ifdef CONFIG_CPU_MIPS32_R2
 	.set	mips64r2
 	mfc0	t0, CP0_STATUS
 	sll	t0, t0, 5
@@ -146,11 +146,11 @@ LEAF(_save_fp_context32)
  *  - cp1 status/control register
  */
 LEAF(_restore_fp_context)
-	EX	lw t0, SC_FPC_CSR(a0)
+	EX	lw t1, SC_FPC_CSR(a0)
 
-#if defined(CONFIG_64BIT) || defined(CONFIG_MIPS32_R2)
+#if defined(CONFIG_64BIT) || defined(CONFIG_CPU_MIPS32_R2)
 	.set	push
-#ifdef CONFIG_MIPS32_R2
+#ifdef CONFIG_CPU_MIPS32_R2
 	.set	mips64r2
 	mfc0	t0, CP0_STATUS
 	sll	t0, t0, 5
@@ -191,7 +191,7 @@ LEAF(_restore_fp_context)
 	EX	ldc1 $f26, SC_FPREGS+208(a0)
 	EX	ldc1 $f28, SC_FPREGS+224(a0)
 	EX	ldc1 $f30, SC_FPREGS+240(a0)
-	ctc1	t0, fcr31
+	ctc1	t1, fcr31
 	jr	ra
 	 li	v0, 0					# success
 	END(_restore_fp_context)
@@ -199,7 +199,7 @@ LEAF(_restore_fp_context)
 #ifdef CONFIG_MIPS32_COMPAT
 LEAF(_restore_fp_context32)
 	/* Restore an o32 sigcontext.  */
-	EX	lw t0, SC32_FPC_CSR(a0)
+	EX	lw t1, SC32_FPC_CSR(a0)
 
 	mfc0	t0, CP0_STATUS
 	sll	t0, t0, 5
@@ -239,7 +239,7 @@ LEAF(_restore_fp_context32)
 	EX	ldc1 $f26, SC32_FPREGS+208(a0)
 	EX	ldc1 $f28, SC32_FPREGS+224(a0)
 	EX	ldc1 $f30, SC32_FPREGS+240(a0)
-	ctc1	t0, fcr31
+	ctc1	t1, fcr31
 	jr	ra
 	 li	v0, 0					# success
 	END(_restore_fp_context32)

arch/mips/kernel/rtlx-cmp.c

@@ -112,5 +112,8 @@ void __exit rtlx_module_exit(void)
 
 	for (i = 0; i < RTLX_CHANNELS; i++)
 		device_destroy(mt_class, MKDEV(major, i));
+
 	unregister_chrdev(major, RTLX_MODULE_NAME);
+
+	aprp_hook = NULL;
 }

arch/mips/kernel/rtlx-mt.c

@@ -144,5 +144,8 @@ void __exit rtlx_module_exit(void)
 
 	for (i = 0; i < RTLX_CHANNELS; i++)
 		device_destroy(mt_class, MKDEV(major, i));
+
 	unregister_chrdev(major, RTLX_MODULE_NAME);
+
+	aprp_hook = NULL;
 }

arch/mips/math-emu/cp1emu.c

@@ -1538,10 +1538,10 @@ static int fpux_emu(struct pt_regs *xcp, struct mips_fpu_struct *ctx,
 		break;
 	}
 
-	case 0x7:		/* 7 */
-		if (MIPSInst_FUNC(ir) != pfetch_op) {
+	case 0x3:
+		if (MIPSInst_FUNC(ir) != pfetch_op)
 			return SIGILL;
-		}
+
 		/* ignore prefx operation */
 		break;
 

arch/mips/mti-malta/malta-amon.c

@@ -72,7 +72,7 @@ int amon_cpu_start(int cpu,
 	return 0;
 }
 
-#ifdef CONFIG_MIPS_VPE_LOADER
+#ifdef CONFIG_MIPS_VPE_LOADER_CMP
 int vpe_run(struct vpe *v)
 {
 	struct vpe_notifications *n;

arch/mips/mti-malta/malta-int.c

@@ -119,7 +119,7 @@ static void malta_hw0_irqdispatch(void)
 
 	do_IRQ(MALTA_INT_BASE + irq);
 
-#ifdef MIPS_VPE_APSP_API
+#ifdef CONFIG_MIPS_VPE_APSP_API_MT
 	if (aprp_hook)
 		aprp_hook();
 #endif
@@ -310,7 +310,7 @@ static void ipi_call_dispatch(void)
 
 static irqreturn_t ipi_resched_interrupt(int irq, void *dev_id)
 {
-#ifdef MIPS_VPE_APSP_API
+#ifdef CONFIG_MIPS_VPE_APSP_API_CMP
 	if (aprp_hook)
 		aprp_hook();
 #endif

arch/mips/pci/msi-octeon.c

@@ -150,6 +150,7 @@ int arch_setup_msi_irq(struct pci_dev *dev, struct msi_desc *desc)
 		msg.address_lo =
 			((128ul << 20) + CVMX_PCI_MSI_RCV) & 0xffffffff;
 		msg.address_hi = ((128ul << 20) + CVMX_PCI_MSI_RCV) >> 32;
+		break;
 	case OCTEON_DMA_BAR_TYPE_BIG:
 		/* When using big bar, Bar 0 is based at 0 */
 		msg.address_lo = (0 + CVMX_PCI_MSI_RCV) & 0xffffffff;