Adding upstream version 6.9.2.upstream/6.9.2

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

18 files changed, 88 insertions, 77 deletions

diff --git a/arch/parisc/Kconfig b/arch/parisc/Kconfig
index 5c845e8d5..daafeb20f 100644
--- a/arch/parisc/Kconfig
+++ b/arch/parisc/Kconfig
@@ -8,11 +8,12 @@ config PARISC
 	select HAVE_FUNCTION_GRAPH_TRACER
 	select HAVE_SYSCALL_TRACEPOINTS
 	select ARCH_WANT_FRAME_POINTERS
+	select ARCH_HAS_CPU_CACHE_ALIASING
 	select ARCH_HAS_DMA_ALLOC if PA11
 	select ARCH_HAS_ELF_RANDOMIZE
 	select ARCH_HAS_STRICT_KERNEL_RWX
 	select ARCH_HAS_STRICT_MODULE_RWX
-	select ARCH_HAS_UBSAN_SANITIZE_ALL
+	select ARCH_HAS_UBSAN
 	select ARCH_HAS_PTE_SPECIAL
 	select ARCH_NO_SG_CHAIN
 	select ARCH_SUPPORTS_HUGETLBFS if PA20
@@ -237,9 +238,9 @@ config PARISC_HUGE_KERNEL
 	def_bool y if !MODULES || UBSAN || FTRACE || COMPILE_TEST
 
 config MLONGCALLS
-	def_bool y if PARISC_HUGE_KERNEL
 	bool "Enable the -mlong-calls compiler option for big kernels" if !PARISC_HUGE_KERNEL
 	depends on PA8X00
+	default PARISC_HUGE_KERNEL
 	help
 	  If you configure the kernel to include many drivers built-in instead
 	  as modules, the kernel executable may become too big, so that the
@@ -254,9 +255,9 @@ config MLONGCALLS
 	  Enabling this option will probably slow down your kernel.
 
 config 64BIT
-	def_bool y if "$(ARCH)" = "parisc64"
 	bool "64-bit kernel" if "$(ARCH)" = "parisc"
 	depends on PA8X00
+	default "$(ARCH)" = "parisc64"
 	help
 	  Enable this if you want to support 64bit kernel on PA-RISC platform.
 
@@ -273,6 +274,7 @@ choice
 
 config PARISC_PAGE_SIZE_4KB
 	bool "4KB"
+	select HAVE_PAGE_SIZE_4KB
 	help
 	  This lets you select the page size of the kernel.  For best
 	  performance, a page size of 16KB is recommended.  For best
@@ -288,10 +290,12 @@ config PARISC_PAGE_SIZE_4KB
 
 config PARISC_PAGE_SIZE_16KB
 	bool "16KB"
+	select HAVE_PAGE_SIZE_16KB
 	depends on PA8X00 && BROKEN && !KFENCE
 
 config PARISC_PAGE_SIZE_64KB
 	bool "64KB"
+	select HAVE_PAGE_SIZE_64KB
 	depends on PA8X00 && BROKEN && !KFENCE
 
 endchoice
diff --git a/arch/parisc/include/asm/cachetype.h b/arch/parisc/include/asm/cachetype.h
new file mode 100644
index 000000000..e0868a1d3
--- /dev/null
+++ b/arch/parisc/include/asm/cachetype.h
@@ -0,0 +1,9 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef __ASM_PARISC_CACHETYPE_H
+#define __ASM_PARISC_CACHETYPE_H
+
+#include <linux/types.h>
+
+#define cpu_dcache_is_aliasing()	true
+
+#endif
diff --git a/arch/parisc/include/asm/page.h b/arch/parisc/include/asm/page.h
index 667e703c0..ad4e15d12 100644
--- a/arch/parisc/include/asm/page.h
+++ b/arch/parisc/include/asm/page.h
@@ -4,15 +4,7 @@
 
 #include <linux/const.h>
 
-#if defined(CONFIG_PARISC_PAGE_SIZE_4KB)
-# define PAGE_SHIFT	12
-#elif defined(CONFIG_PARISC_PAGE_SIZE_16KB)
-# define PAGE_SHIFT	14
-#elif defined(CONFIG_PARISC_PAGE_SIZE_64KB)
-# define PAGE_SHIFT	16
-#else
-# error "unknown default kernel page size"
-#endif
+#define PAGE_SHIFT	CONFIG_PAGE_SHIFT
 #define PAGE_SIZE	(_AC(1,UL) << PAGE_SHIFT)
 #define PAGE_MASK	(~(PAGE_SIZE-1))
 
diff --git a/arch/parisc/include/asm/parisc-device.h b/arch/parisc/include/asm/parisc-device.h
index 4de3b391d..7ddd7f433 100644
--- a/arch/parisc/include/asm/parisc-device.h
+++ b/arch/parisc/include/asm/parisc-device.h
@@ -61,7 +61,7 @@ parisc_get_drvdata(struct parisc_device *d)
 	return dev_get_drvdata(&d->dev);
 }
 
-extern struct bus_type parisc_bus_type;
+extern const struct bus_type parisc_bus_type;
 
 int iosapic_serial_irq(struct parisc_device *dev);
 
diff --git a/arch/parisc/kernel/drivers.c b/arch/parisc/kernel/drivers.c
index c7ff33973..ac19d685e 100644
--- a/arch/parisc/kernel/drivers.c
+++ b/arch/parisc/kernel/drivers.c
@@ -618,7 +618,7 @@ static struct attribute *parisc_device_attrs[] = {
 };
 ATTRIBUTE_GROUPS(parisc_device);
 
-struct bus_type parisc_bus_type = {
+const struct bus_type parisc_bus_type = {
 	.name = "parisc",
 	.match = parisc_generic_match,
 	.uevent = parisc_uevent,
diff --git a/arch/parisc/kernel/irq.c b/arch/parisc/kernel/irq.c
index 2f81bfd4f..dff66be65 100644
--- a/arch/parisc/kernel/irq.c
+++ b/arch/parisc/kernel/irq.c
@@ -498,7 +498,7 @@ asmlinkage void do_cpu_irq_mask(struct pt_regs *regs)
 
 	old_regs = set_irq_regs(regs);
 	local_irq_disable();
-	irq_enter();
+	irq_enter_rcu();
 
 	eirr_val = mfctl(23) & cpu_eiem & per_cpu(local_ack_eiem, cpu);
 	if (!eirr_val)
@@ -533,7 +533,7 @@ asmlinkage void do_cpu_irq_mask(struct pt_regs *regs)
 #endif /* CONFIG_IRQSTACKS */
 
  out:
-	irq_exit();
+	irq_exit_rcu();
 	set_irq_regs(old_regs);
 	return;
 
diff --git a/arch/parisc/kernel/parisc_ksyms.c b/arch/parisc/kernel/parisc_ksyms.c
index dcf61cbd3..6f0c92e81 100644
--- a/arch/parisc/kernel/parisc_ksyms.c
+++ b/arch/parisc/kernel/parisc_ksyms.c
@@ -22,7 +22,6 @@ EXPORT_SYMBOL(memset);
 #include <linux/atomic.h>
 EXPORT_SYMBOL(__xchg8);
 EXPORT_SYMBOL(__xchg32);
-EXPORT_SYMBOL(__cmpxchg_u8);
 EXPORT_SYMBOL(__cmpxchg_u32);
 EXPORT_SYMBOL(__cmpxchg_u64);
 #ifdef CONFIG_SMP
diff --git a/arch/parisc/kernel/unaligned.c b/arch/parisc/kernel/unaligned.c
index a8e75e5b8..71e596ca5 100644
--- a/arch/parisc/kernel/unaligned.c
+++ b/arch/parisc/kernel/unaligned.c
@@ -396,6 +396,13 @@ void handle_unaligned(struct pt_regs *regs)
 
 		if (!unaligned_enabled)
 			goto force_sigbus;
+	} else {
+		static DEFINE_RATELIMIT_STATE(kernel_ratelimit, 5 * HZ, 5);
+		if (!(current->thread.flags & PARISC_UAC_NOPRINT) &&
+			__ratelimit(&kernel_ratelimit))
+			pr_warn("Kernel: unaligned access to " RFMT " in %pS "
+					"(iir " RFMT ")\n",
+				regs->ior, (void *)regs->iaoq[0], regs->iir);
 	}
 
 	/* handle modification - OK, it's ugly, see the instruction manual */
diff --git a/arch/parisc/math-emu/dfsqrt.c b/arch/parisc/math-emu/dfsqrt.c
index 63d339c81..e3a3a19b9 100644
--- a/arch/parisc/math-emu/dfsqrt.c
+++ b/arch/parisc/math-emu/dfsqrt.c
@@ -15,7 +15,7 @@
  *	Double Floating-point Square Root
  *
  *  External Interfaces:
- *	dbl_fsqrt(srcptr,nullptr,dstptr,status)
+ *	dbl_fsqrt(srcptr,_nullptr,dstptr,status)
  *
  *  Internal Interfaces:
  *
@@ -37,7 +37,7 @@
 unsigned int
 dbl_fsqrt(
 	    dbl_floating_point *srcptr,
-	    unsigned int *nullptr,
+	    unsigned int *_nullptr,
 	    dbl_floating_point *dstptr,
 	    unsigned int *status)
 {
diff --git a/arch/parisc/math-emu/fcnvff.c b/arch/parisc/math-emu/fcnvff.c
index 0530e6127..61e489704 100644
--- a/arch/parisc/math-emu/fcnvff.c
+++ b/arch/parisc/math-emu/fcnvff.c
@@ -16,8 +16,8 @@
  *	Double Floating-point to Single Floating-point
  *
  *  External Interfaces:
- *	dbl_to_sgl_fcnvff(srcptr,nullptr,dstptr,status)
- *	sgl_to_dbl_fcnvff(srcptr,nullptr,dstptr,status)
+ *	dbl_to_sgl_fcnvff(srcptr,_nullptr,dstptr,status)
+ *	sgl_to_dbl_fcnvff(srcptr,_nullptr,dstptr,status)
  *
  *  Internal Interfaces:
  *
@@ -40,7 +40,7 @@
 int
 sgl_to_dbl_fcnvff(
 	    sgl_floating_point *srcptr,
-	    unsigned int *nullptr,
+	    unsigned int *_nullptr,
 	    dbl_floating_point *dstptr,
 	    unsigned int *status)
 {
@@ -127,7 +127,7 @@ sgl_to_dbl_fcnvff(
 int
 dbl_to_sgl_fcnvff(
 		    dbl_floating_point *srcptr,
-		    unsigned int *nullptr,
+		    unsigned int *_nullptr,
 		    sgl_floating_point *dstptr,
 		    unsigned int *status)
 {
diff --git a/arch/parisc/math-emu/fcnvfu.c b/arch/parisc/math-emu/fcnvfu.c
index c971618a6..c31790cee 100644
--- a/arch/parisc/math-emu/fcnvfu.c
+++ b/arch/parisc/math-emu/fcnvfu.c
@@ -15,10 +15,10 @@
  *	Floating-point to Unsigned Fixed-point Converts
  *
  *  External Interfaces:
- *	dbl_to_dbl_fcnvfu(srcptr,nullptr,dstptr,status)
- *	dbl_to_sgl_fcnvfu(srcptr,nullptr,dstptr,status)
- *	sgl_to_dbl_fcnvfu(srcptr,nullptr,dstptr,status)
- *	sgl_to_sgl_fcnvfu(srcptr,nullptr,dstptr,status)
+ *	dbl_to_dbl_fcnvfu(srcptr,_nullptr,dstptr,status)
+ *	dbl_to_sgl_fcnvfu(srcptr,_nullptr,dstptr,status)
+ *	sgl_to_dbl_fcnvfu(srcptr,_nullptr,dstptr,status)
+ *	sgl_to_sgl_fcnvfu(srcptr,_nullptr,dstptr,status)
  *
  *  Internal Interfaces:
  *
@@ -45,7 +45,7 @@
 int
 sgl_to_sgl_fcnvfu(
 			sgl_floating_point *srcptr,
-			unsigned int *nullptr,
+			unsigned int *_nullptr,
 			unsigned int *dstptr,
 			unsigned int *status)
 {
@@ -166,7 +166,7 @@ sgl_to_sgl_fcnvfu(
 int
 sgl_to_dbl_fcnvfu(
 		    sgl_floating_point *srcptr,
-		    unsigned int *nullptr,
+		    unsigned int *_nullptr,
 		    dbl_unsigned *dstptr,
 		    unsigned int *status)
 {
@@ -285,7 +285,7 @@ sgl_to_dbl_fcnvfu(
  */
 /*ARGSUSED*/
 int
-dbl_to_sgl_fcnvfu (dbl_floating_point * srcptr, unsigned int *nullptr,
+dbl_to_sgl_fcnvfu (dbl_floating_point * srcptr, unsigned int *_nullptr,
 		   unsigned int *dstptr, unsigned int *status)
 {
 	register unsigned int srcp1, srcp2, result;
@@ -408,7 +408,7 @@ dbl_to_sgl_fcnvfu (dbl_floating_point * srcptr, unsigned int *nullptr,
  */
 /*ARGSUSED*/
 int
-dbl_to_dbl_fcnvfu (dbl_floating_point * srcptr, unsigned int *nullptr,
+dbl_to_dbl_fcnvfu (dbl_floating_point * srcptr, unsigned int *_nullptr,
 		   dbl_unsigned * dstptr, unsigned int *status)
 {
 	register int src_exponent;
diff --git a/arch/parisc/math-emu/fcnvfut.c b/arch/parisc/math-emu/fcnvfut.c
index 5b657f852..2cf1daf3b 100644
--- a/arch/parisc/math-emu/fcnvfut.c
+++ b/arch/parisc/math-emu/fcnvfut.c
@@ -15,10 +15,10 @@
  *	Floating-point to Unsigned Fixed-point Converts with Truncation
  *
  *  External Interfaces:
- *	dbl_to_dbl_fcnvfut(srcptr,nullptr,dstptr,status)
- *	dbl_to_sgl_fcnvfut(srcptr,nullptr,dstptr,status)
- *	sgl_to_dbl_fcnvfut(srcptr,nullptr,dstptr,status)
- *	sgl_to_sgl_fcnvfut(srcptr,nullptr,dstptr,status)
+ *	dbl_to_dbl_fcnvfut(srcptr,_nullptr,dstptr,status)
+ *	dbl_to_sgl_fcnvfut(srcptr,_nullptr,dstptr,status)
+ *	sgl_to_dbl_fcnvfut(srcptr,_nullptr,dstptr,status)
+ *	sgl_to_sgl_fcnvfut(srcptr,_nullptr,dstptr,status)
  *
  *  Internal Interfaces:
  *
@@ -44,7 +44,7 @@
  */
 /*ARGSUSED*/
 int
-sgl_to_sgl_fcnvfut (sgl_floating_point * srcptr, unsigned int *nullptr,
+sgl_to_sgl_fcnvfut (sgl_floating_point * srcptr, unsigned int *_nullptr,
 		    unsigned int *dstptr, unsigned int *status)
 {
 	register unsigned int src, result;
@@ -113,7 +113,7 @@ sgl_to_sgl_fcnvfut (sgl_floating_point * srcptr, unsigned int *nullptr,
  */
 /*ARGSUSED*/
 int
-sgl_to_dbl_fcnvfut (sgl_floating_point * srcptr, unsigned int *nullptr,
+sgl_to_dbl_fcnvfut (sgl_floating_point * srcptr, unsigned int *_nullptr,
 		    dbl_unsigned * dstptr, unsigned int *status)
 {
 	register int src_exponent;
@@ -183,7 +183,7 @@ sgl_to_dbl_fcnvfut (sgl_floating_point * srcptr, unsigned int *nullptr,
  */
 /*ARGSUSED*/
 int
-dbl_to_sgl_fcnvfut (dbl_floating_point * srcptr, unsigned int *nullptr,
+dbl_to_sgl_fcnvfut (dbl_floating_point * srcptr, unsigned int *_nullptr,
 		    unsigned int *dstptr, unsigned int *status)
 {
 	register unsigned int srcp1, srcp2, result;
@@ -252,7 +252,7 @@ dbl_to_sgl_fcnvfut (dbl_floating_point * srcptr, unsigned int *nullptr,
  */
 /*ARGSUSED*/
 int
-dbl_to_dbl_fcnvfut (dbl_floating_point * srcptr, unsigned int *nullptr,
+dbl_to_dbl_fcnvfut (dbl_floating_point * srcptr, unsigned int *_nullptr,
 		    dbl_unsigned * dstptr, unsigned int *status)
 {
 	register int src_exponent;
diff --git a/arch/parisc/math-emu/fcnvfx.c b/arch/parisc/math-emu/fcnvfx.c
index 5e153078d..99bd61479 100644
--- a/arch/parisc/math-emu/fcnvfx.c
+++ b/arch/parisc/math-emu/fcnvfx.c
@@ -18,10 +18,10 @@
  *	Double Floating-point to Double Fixed-point 
  *
  *  External Interfaces:
- *	dbl_to_dbl_fcnvfx(srcptr,nullptr,dstptr,status)
- *	dbl_to_sgl_fcnvfx(srcptr,nullptr,dstptr,status)
- *	sgl_to_dbl_fcnvfx(srcptr,nullptr,dstptr,status)
- *	sgl_to_sgl_fcnvfx(srcptr,nullptr,dstptr,status)
+ *	dbl_to_dbl_fcnvfx(srcptr,_nullptr,dstptr,status)
+ *	dbl_to_sgl_fcnvfx(srcptr,_nullptr,dstptr,status)
+ *	sgl_to_dbl_fcnvfx(srcptr,_nullptr,dstptr,status)
+ *	sgl_to_sgl_fcnvfx(srcptr,_nullptr,dstptr,status)
  *
  *  Internal Interfaces:
  *
@@ -44,7 +44,7 @@
 int
 sgl_to_sgl_fcnvfx(
 		    sgl_floating_point *srcptr,
-		    sgl_floating_point *nullptr,
+		    sgl_floating_point *_nullptr,
 		    int *dstptr,
 		    sgl_floating_point *status)
 {
@@ -141,7 +141,7 @@ sgl_to_sgl_fcnvfx(
 int
 sgl_to_dbl_fcnvfx(
 		sgl_floating_point *srcptr,
-		unsigned int *nullptr,
+		unsigned int *_nullptr,
 		dbl_integer *dstptr,
 		unsigned int *status)
 {
@@ -262,7 +262,7 @@ sgl_to_dbl_fcnvfx(
 int
 dbl_to_sgl_fcnvfx(
 		    dbl_floating_point *srcptr,
-		    unsigned int *nullptr,
+		    unsigned int *_nullptr,
 		    int *dstptr,
 		    unsigned int *status)
 {
@@ -373,7 +373,7 @@ dbl_to_sgl_fcnvfx(
 int
 dbl_to_dbl_fcnvfx(
 		    dbl_floating_point *srcptr,
-		    unsigned int *nullptr,
+		    unsigned int *_nullptr,
 		    dbl_integer *dstptr,
 		    unsigned int *status)
 {
diff --git a/arch/parisc/math-emu/fcnvfxt.c b/arch/parisc/math-emu/fcnvfxt.c
index ebec31e40..3b7cc6225 100644
--- a/arch/parisc/math-emu/fcnvfxt.c
+++ b/arch/parisc/math-emu/fcnvfxt.c
@@ -18,10 +18,10 @@
  *	Double Floating-point to Double Fixed-point /w truncated result
  *
  *  External Interfaces:
- *	dbl_to_dbl_fcnvfxt(srcptr,nullptr,dstptr,status)
- *	dbl_to_sgl_fcnvfxt(srcptr,nullptr,dstptr,status)
- *	sgl_to_dbl_fcnvfxt(srcptr,nullptr,dstptr,status)
- *	sgl_to_sgl_fcnvfxt(srcptr,nullptr,dstptr,status)
+ *	dbl_to_dbl_fcnvfxt(srcptr,_nullptr,dstptr,status)
+ *	dbl_to_sgl_fcnvfxt(srcptr,_nullptr,dstptr,status)
+ *	sgl_to_dbl_fcnvfxt(srcptr,_nullptr,dstptr,status)
+ *	sgl_to_sgl_fcnvfxt(srcptr,_nullptr,dstptr,status)
  *
  *  Internal Interfaces:
  *
@@ -45,7 +45,7 @@
 int
 sgl_to_sgl_fcnvfxt(
 		    sgl_floating_point *srcptr,
-		    unsigned int *nullptr,
+		    unsigned int *_nullptr,
 		    int *dstptr,
 		    unsigned int *status)
 {
@@ -109,7 +109,7 @@ sgl_to_sgl_fcnvfxt(
 int
 sgl_to_dbl_fcnvfxt(
 		    sgl_floating_point *srcptr,
-		    unsigned int *nullptr,
+		    unsigned int *_nullptr,
 		    dbl_integer *dstptr,
 		    unsigned int *status)
 {
@@ -183,7 +183,7 @@ sgl_to_dbl_fcnvfxt(
 int
 dbl_to_sgl_fcnvfxt(
 			dbl_floating_point *srcptr,
-			unsigned int *nullptr,
+			unsigned int *_nullptr,
 			int *dstptr,
 			unsigned int *status)
 {
@@ -248,7 +248,7 @@ dbl_to_sgl_fcnvfxt(
 int
 dbl_to_dbl_fcnvfxt(
 			dbl_floating_point *srcptr,
-			unsigned int *nullptr,
+			unsigned int *_nullptr,
 			dbl_integer *dstptr,
 			unsigned int *status)
 {
diff --git a/arch/parisc/math-emu/fcnvuf.c b/arch/parisc/math-emu/fcnvuf.c
index c54978a0a..c166feb57 100644
--- a/arch/parisc/math-emu/fcnvuf.c
+++ b/arch/parisc/math-emu/fcnvuf.c
@@ -15,10 +15,10 @@
  *	Fixed point to Floating-point Converts
  *
  *  External Interfaces:
- *	dbl_to_dbl_fcnvuf(srcptr,nullptr,dstptr,status)
- *	dbl_to_sgl_fcnvuf(srcptr,nullptr,dstptr,status)
- *	sgl_to_dbl_fcnvuf(srcptr,nullptr,dstptr,status)
- *	sgl_to_sgl_fcnvuf(srcptr,nullptr,dstptr,status)
+ *	dbl_to_dbl_fcnvuf(srcptr,_nullptr,dstptr,status)
+ *	dbl_to_sgl_fcnvuf(srcptr,_nullptr,dstptr,status)
+ *	sgl_to_dbl_fcnvuf(srcptr,_nullptr,dstptr,status)
+ *	sgl_to_sgl_fcnvuf(srcptr,_nullptr,dstptr,status)
  *
  *  Internal Interfaces:
  *
@@ -45,7 +45,7 @@
 int
 sgl_to_sgl_fcnvuf(
 			unsigned int *srcptr,
-			unsigned int *nullptr,
+			unsigned int *_nullptr,
 			sgl_floating_point *dstptr,
 			unsigned int *status)
 {
@@ -104,7 +104,7 @@ sgl_to_sgl_fcnvuf(
 int
 sgl_to_dbl_fcnvuf(
 			unsigned int *srcptr,
-			unsigned int *nullptr,
+			unsigned int *_nullptr,
 			dbl_floating_point *dstptr,
 			unsigned int *status)
 {
@@ -145,7 +145,7 @@ sgl_to_dbl_fcnvuf(
 int
 dbl_to_sgl_fcnvuf(
 			dbl_unsigned *srcptr,
-			unsigned int *nullptr,
+			unsigned int *_nullptr,
 			sgl_floating_point *dstptr,
 			unsigned int *status)
 {
@@ -227,7 +227,7 @@ dbl_to_sgl_fcnvuf(
 int
 dbl_to_dbl_fcnvuf(
 		    dbl_unsigned *srcptr,
-		    unsigned int *nullptr,
+		    unsigned int *_nullptr,
 		    dbl_floating_point *dstptr,
 		    unsigned int *status)
 {
diff --git a/arch/parisc/math-emu/fcnvxf.c b/arch/parisc/math-emu/fcnvxf.c
index 694017971..11bc1e8a1 100644
--- a/arch/parisc/math-emu/fcnvxf.c
+++ b/arch/parisc/math-emu/fcnvxf.c
@@ -18,10 +18,10 @@
  *	Double Fixed-point to Double Floating-point 
  *
  *  External Interfaces:
- *	dbl_to_dbl_fcnvxf(srcptr,nullptr,dstptr,status)
- *	dbl_to_sgl_fcnvxf(srcptr,nullptr,dstptr,status)
- *	sgl_to_dbl_fcnvxf(srcptr,nullptr,dstptr,status)
- *	sgl_to_sgl_fcnvxf(srcptr,nullptr,dstptr,status)
+ *	dbl_to_dbl_fcnvxf(srcptr,_nullptr,dstptr,status)
+ *	dbl_to_sgl_fcnvxf(srcptr,_nullptr,dstptr,status)
+ *	sgl_to_dbl_fcnvxf(srcptr,_nullptr,dstptr,status)
+ *	sgl_to_sgl_fcnvxf(srcptr,_nullptr,dstptr,status)
  *
  *  Internal Interfaces:
  *
@@ -44,7 +44,7 @@
 int
 sgl_to_sgl_fcnvxf(
 		    int *srcptr,
-		    unsigned int *nullptr,
+		    unsigned int *_nullptr,
 		    sgl_floating_point *dstptr,
 		    unsigned int *status)
 {
@@ -115,7 +115,7 @@ sgl_to_sgl_fcnvxf(
 int
 sgl_to_dbl_fcnvxf(
 		    int *srcptr,
-		    unsigned int *nullptr,
+		    unsigned int *_nullptr,
 		    dbl_floating_point *dstptr,
 		    unsigned int *status)
 {
@@ -166,7 +166,7 @@ sgl_to_dbl_fcnvxf(
 int
 dbl_to_sgl_fcnvxf(
 			dbl_integer *srcptr,
-			unsigned int *nullptr,
+			unsigned int *_nullptr,
 			sgl_floating_point *dstptr,
 			unsigned int *status)
 {
@@ -271,7 +271,7 @@ dbl_to_sgl_fcnvxf(
 int
 dbl_to_dbl_fcnvxf(
 		    dbl_integer *srcptr,
-		    unsigned int *nullptr,
+		    unsigned int *_nullptr,
 		    dbl_floating_point *dstptr,
 		    unsigned int *status)
 {
diff --git a/arch/parisc/math-emu/frnd.c b/arch/parisc/math-emu/frnd.c
index 0b0e8493e..825d89650 100644
--- a/arch/parisc/math-emu/frnd.c
+++ b/arch/parisc/math-emu/frnd.c
@@ -14,8 +14,8 @@
  *	Quad Floating-point Round to Integer (returns unimplemented)
  *
  *  External Interfaces:
- *	dbl_frnd(srcptr,nullptr,dstptr,status)
- *	sgl_frnd(srcptr,nullptr,dstptr,status)
+ *	dbl_frnd(srcptr,_nullptr,dstptr,status)
+ *	sgl_frnd(srcptr,_nullptr,dstptr,status)
  *
  * END_DESC
 */
@@ -33,7 +33,7 @@
 /*ARGSUSED*/
 int
 sgl_frnd(sgl_floating_point *srcptr,
-	unsigned int *nullptr,
+	unsigned int *_nullptr,
 	sgl_floating_point *dstptr,
 	unsigned int *status)
 {
@@ -138,7 +138,7 @@ sgl_frnd(sgl_floating_point *srcptr,
 int
 dbl_frnd(
 	dbl_floating_point *srcptr,
-	unsigned int *nullptr,
+	unsigned int *_nullptr,
 	dbl_floating_point *dstptr,
 	unsigned int *status)
 {
diff --git a/arch/parisc/math-emu/sfsqrt.c b/arch/parisc/math-emu/sfsqrt.c
index bd6a84f46..8e9e023e7 100644
--- a/arch/parisc/math-emu/sfsqrt.c
+++ b/arch/parisc/math-emu/sfsqrt.c
@@ -15,7 +15,7 @@
  *	Single Floating-point Square Root
  *
  *  External Interfaces:
- *	sgl_fsqrt(srcptr,nullptr,dstptr,status)
+ *	sgl_fsqrt(srcptr,_nullptr,dstptr,status)
  *
  *  Internal Interfaces:
  *
@@ -37,7 +37,7 @@
 unsigned int
 sgl_fsqrt(
     sgl_floating_point *srcptr,
-    unsigned int *nullptr,
+    unsigned int *_nullptr,
     sgl_floating_point *dstptr,
     unsigned int *status)
 {