Merge tag 'parisc-for-6.9-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/deller/parisc-linux

Pull parisc architecture updates and fixes from Helge Deller:
 "Fixes for the IPv4 and IPv6 checksum functions, a fix for the 64-bit
  unaligned memory exception handler and various code cleanups.

  Most of the patches are tagged for stable series.

   - Fix inline assembly in ipv4 and ipv6 checksum functions (Guenter
     Roeck)

   - Rewrite 64-bit inline assembly of emulate_ldd() (Guenter Roeck)

   - Do not clobber carry/borrow bits in tophys and tovirt macros (John
     David Anglin)

   - Warn when kernel accesses unaligned memory"

* tag 'parisc-for-6.9-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/deller/parisc-linux:
  parisc: led: Convert to platform remove callback returning void
  parisc: Strip upper 32 bit of sum in csum_ipv6_magic for 64-bit builds
  parisc: Fix csum_ipv6_magic on 64-bit systems
  parisc: Fix csum_ipv6_magic on 32-bit systems
  parisc: Fix ip_fast_csum
  parisc: Avoid clobbering the C/B bits in the PSW with tophys and tovirt macros
  parisc/unaligned: Rewrite 64-bit inline assembly of emulate_ldd()
  parisc: make parisc_bus_type const
  parisc: avoid c23 'nullptr' idenitifier
  parisc: Show kernel unaligned memory accesses
  parisc: Use irq_enter_rcu() to fix warning at kernel/context_tracking.c:367

Author: torvalds

arch/parisc/include/asm/assembly.h

@@ -97,26 +97,28 @@
 	 * version takes two arguments: a src and destination register.
 	 * However, the source and destination registers can not be
 	 * the same register.
+	 *
+	 * We use add,l to avoid clobbering the C/B bits in the PSW.
 	 */
 
 	.macro  tophys  grvirt, grphys
-	ldil    L%(__PAGE_OFFSET), \grphys
-	sub     \grvirt, \grphys, \grphys
+	ldil    L%(-__PAGE_OFFSET), \grphys
+	addl    \grvirt, \grphys, \grphys
 	.endm
-	
+
 	.macro  tovirt  grphys, grvirt
 	ldil    L%(__PAGE_OFFSET), \grvirt
-	add     \grphys, \grvirt, \grvirt
+	addl    \grphys, \grvirt, \grvirt
 	.endm
 
 	.macro  tophys_r1  gr
-	ldil    L%(__PAGE_OFFSET), %r1
-	sub     \gr, %r1, \gr
+	ldil    L%(-__PAGE_OFFSET), %r1
+	addl    \gr, %r1, \gr
 	.endm
-	
+
 	.macro  tovirt_r1  gr
 	ldil    L%(__PAGE_OFFSET), %r1
-	add     \gr, %r1, \gr
+	addl    \gr, %r1, \gr
 	.endm
 
 	.macro delay value

arch/parisc/include/asm/checksum.h

@@ -40,7 +40,7 @@ static inline __sum16 ip_fast_csum(const void *iph, unsigned int ihl)
 "	addc		%0, %5, %0\n"
 "	addc		%0, %3, %0\n"
 "1:	ldws,ma		4(%1), %3\n"
-"	addib,<		0, %2, 1b\n"
+"	addib,>		-1, %2, 1b\n"
 "	addc		%0, %3, %0\n"
 "\n"
 "	extru		%0, 31, 16, %4\n"
@@ -126,6 +126,7 @@ static __inline__ __sum16 csum_ipv6_magic(const struct in6_addr *saddr,
 	** Try to keep 4 registers with "live" values ahead of the ALU.
 	*/
 
+"	depdi		0, 31, 32, %0\n"/* clear upper half of incoming checksum */
 "	ldd,ma		8(%1), %4\n"	/* get 1st saddr word */
 "	ldd,ma		8(%2), %5\n"	/* get 1st daddr word */
 "	add		%4, %0, %0\n"
@@ -137,8 +138,8 @@ static __inline__ __sum16 csum_ipv6_magic(const struct in6_addr *saddr,
 "	add,dc		%3, %0, %0\n"  /* fold in proto+len | carry bit */
 "	extrd,u		%0, 31, 32, %4\n"/* copy upper half down */
 "	depdi		0, 31, 32, %0\n"/* clear upper half */
-"	add		%4, %0, %0\n"	/* fold into 32-bits */
-"	addc		0, %0, %0\n"	/* add carry */
+"	add,dc		%4, %0, %0\n"	/* fold into 32-bits, plus carry */
+"	addc		0, %0, %0\n"	/* add final carry */
 
 #else
 
@@ -163,7 +164,8 @@ static __inline__ __sum16 csum_ipv6_magic(const struct in6_addr *saddr,
 "	ldw,ma		4(%2), %7\n"	/* 4th daddr */
 "	addc		%6, %0, %0\n"
 "	addc		%7, %0, %0\n"
-"	addc		%3, %0, %0\n"	/* fold in proto+len, catch carry */
+"	addc		%3, %0, %0\n"	/* fold in proto+len */
+"	addc		0, %0, %0\n"	/* add carry */
 
 #endif
 	: "=r" (sum), "=r" (saddr), "=r" (daddr), "=r" (len),

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);
 

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,

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;
 

arch/parisc/kernel/unaligned.c

@@ -169,6 +169,7 @@ static int emulate_ldw(struct pt_regs *regs, int toreg, int flop)
 static int emulate_ldd(struct pt_regs *regs, int toreg, int flop)
 {
 	unsigned long saddr = regs->ior;
+	unsigned long shift, temp1;
 	__u64 val = 0;
 	ASM_EXCEPTIONTABLE_VAR(ret);
 
@@ -180,25 +181,22 @@ static int emulate_ldd(struct pt_regs *regs, int toreg, int flop)
 
 #ifdef CONFIG_64BIT
 	__asm__ __volatile__  (
-"	depd,z	%3,60,3,%%r19\n"		/* r19=(ofs&7)*8 */
-"	mtsp	%4, %%sr1\n"
-"	depd	%%r0,63,3,%3\n"
-"1:	ldd	0(%%sr1,%3),%0\n"
-"2:	ldd	8(%%sr1,%3),%%r20\n"
-"	subi	64,%%r19,%%r19\n"
-"	mtsar	%%r19\n"
-"	shrpd	%0,%%r20,%%sar,%0\n"
+"	depd,z	%2,60,3,%3\n"		/* shift=(ofs&7)*8 */
+"	mtsp	%5, %%sr1\n"
+"	depd	%%r0,63,3,%2\n"
+"1:	ldd	0(%%sr1,%2),%0\n"
+"2:	ldd	8(%%sr1,%2),%4\n"
+"	subi	64,%3,%3\n"
+"	mtsar	%3\n"
+"	shrpd	%0,%4,%%sar,%0\n"
 "3:	\n"
 	ASM_EXCEPTIONTABLE_ENTRY_EFAULT(1b, 3b, "%1")
 	ASM_EXCEPTIONTABLE_ENTRY_EFAULT(2b, 3b, "%1")
-	: "=r" (val), "+r" (ret)
-	: "0" (val), "r" (saddr), "r" (regs->isr)
-	: "r19", "r20" );
+	: "+r" (val), "+r" (ret), "+r" (saddr), "=&r" (shift), "=&r" (temp1)
+	: "r" (regs->isr) );
 #else
-    {
-	unsigned long shift, temp1;
 	__asm__ __volatile__  (
-"	zdep	%2,29,2,%3\n"		/* r19=(ofs&3)*8 */
+"	zdep	%2,29,2,%3\n"		/* shift=(ofs&3)*8 */
 "	mtsp	%5, %%sr1\n"
 "	dep	%%r0,31,2,%2\n"
 "1:	ldw	0(%%sr1,%2),%0\n"
@@ -214,7 +212,6 @@ static int emulate_ldd(struct pt_regs *regs, int toreg, int flop)
 	ASM_EXCEPTIONTABLE_ENTRY_EFAULT(3b, 4b, "%1")
 	: "+r" (val), "+r" (ret), "+r" (saddr), "=&r" (shift), "=&r" (temp1)
 	: "r" (regs->isr) );
-    }
 #endif
 
 	DPRINTF("val = 0x%llx\n", val);
@@ -399,6 +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 */

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)
 {

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)
 {

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;

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;