Merge tag 'for-5.17/parisc-1' of git://git.kernel.org/pub/scm/linux/kernel/git/deller/parisc-linux

Pull parisc architecture updates from Helge Deller:

 - Fix lpa and lpa_user defines (John David Anglin)

 - Fix symbol lookup of init functions with an __is_kernel() fix (Helge
   Deller)

 - Fix wrong pdc_toc_pim_11 and pdc_toc_pim_20 definitions (Helge
   Deller)

 - Add lws_atomic_xchg and lws_atomic_store syscalls (John David Anglin)

 - Rewrite light-weight syscall and futex code (John David Anglin)

 - Enable TOC (transfer of contents) feature unconditionally (Helge
   Deller)

 - Improve fault handler messages (John David Anglin)

 - Improve build process (Masahiro Yamada)

 - Reduce kernel code footprint of user access functions (Helge Deller)

 - Fix build error due to outX() macros (Bart Van Assche)

 - Ue default_groups in kobj_type in pdc_stable (Greg Kroah-Hartman)

 - Default to 16 CPUs on 32-bit kernel (Helge Deller)

* tag 'for-5.17/parisc-1' of git://git.kernel.org/pub/scm/linux/kernel/git/deller/parisc-linux:
  parisc: Default to 16 CPUs on 32-bit kernel
  sections: Fix __is_kernel() to include init ranges
  parisc: Re-use toc_stack as hpmc_stack
  parisc: Enable TOC (transfer of contents) feature unconditionally
  parisc: io: Improve the outb(), outw() and outl() macros
  parisc: pdc_stable: use default_groups in kobj_type
  parisc: Add kgdb io_module to read chars via PDC
  parisc: Fix pdc_toc_pim_11 and pdc_toc_pim_20 definitions
  parisc: Add lws_atomic_xchg and lws_atomic_store syscalls
  parisc: Rewrite light-weight syscall and futex code
  parisc: Enhance page fault termination message
  parisc: Don't call faulthandler_disabled() in do_page_fault()
  parisc: Switch user access functions to signal errors in r29 instead of r8
  parisc: Avoid calling faulthandler_disabled() twice
  parisc: Fix lpa and lpa_user defines
  parisc: Define depi_safe macro
  parisc: decompressor: do not copy source files while building

1 files changed, 13 insertions, 10 deletions

diff --git a/arch/parisc/mm/fault.c b/arch/parisc/mm/fault.c
index 4a6221b869fd..147868427b7c 100644
--- a/arch/parisc/mm/fault.c
+++ b/arch/parisc/mm/fault.c
@@ -148,11 +148,11 @@ int fixup_exception(struct pt_regs *regs)
 		 * Fix up get_user() and put_user().
 		 * ASM_EXCEPTIONTABLE_ENTRY_EFAULT() sets the least-significant
 		 * bit in the relative address of the fixup routine to indicate
-		 * that %r8 should be loaded with -EFAULT to report a userspace
-		 * access error.
+		 * that gr[ASM_EXCEPTIONTABLE_REG] should be loaded with
+		 * -EFAULT to report a userspace access error.
 		 */
 		if (fix->fixup & 1) {
-			regs->gr[8] = -EFAULT;
+			regs->gr[ASM_EXCEPTIONTABLE_REG] = -EFAULT;
 
 			/* zero target register for get_user() */
 			if (parisc_acctyp(0, regs->iir) == VM_READ) {
@@ -266,14 +266,14 @@ void do_page_fault(struct pt_regs *regs, unsigned long code,
 	unsigned long acc_type;
 	vm_fault_t fault = 0;
 	unsigned int flags;
-
-	if (faulthandler_disabled())
-		goto no_context;
+	char *msg;
 
 	tsk = current;
 	mm = tsk->mm;
-	if (!mm)
+	if (!mm) {
+		msg = "Page fault: no context";
 		goto no_context;
+	}
 
 	flags = FAULT_FLAG_DEFAULT;
 	if (user_mode(regs))
@@ -409,6 +409,7 @@ bad_area:
 		force_sig_fault(signo, si_code, (void __user *) address);
 		return;
 	}
+	msg = "Page fault: bad address";
 
 no_context:
 
@@ -416,11 +417,13 @@ no_context:
 		return;
 	}
 
-	parisc_terminate("Bad Address (null pointer deref?)", regs, code, address);
+	parisc_terminate(msg, regs, code, address);
 
-  out_of_memory:
+out_of_memory:
 	mmap_read_unlock(mm);
-	if (!user_mode(regs))
+	if (!user_mode(regs)) {
+		msg = "Page fault: out of memory";
 		goto no_context;
+	}
 	pagefault_out_of_memory();
 }