parisc architecture fixes and updates for kernel v6.5-rc1 (pt 2):

* Fix all compiler warnings in arch/parisc and drivers/parisc when
   compiled with W=1
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Merge tag 'parisc-for-6.5-rc1-2' of git://git.kernel.org/pub/scm/linux/kernel/git/deller/parisc-linux

Pull more parisc architecture updates from Helge Deller:

 -  Fix all compiler warnings in arch/parisc and drivers/parisc when
    compiled with W=1

* tag 'parisc-for-6.5-rc1-2' of git://git.kernel.org/pub/scm/linux/kernel/git/deller/parisc-linux:
  parisc: syscalls: Avoid compiler warnings with W=1
  parisc: math-emu: Avoid compiler warnings with W=1
  parisc: Raise minimal GCC version to 12.0.0
  parisc: unwind: Avoid missing prototype warning for handle_interruption()
  parisc: smp: Add declaration for start_cpu_itimer()
  parisc: pdt: Get prototype for arch_report_meminfo()

arch/parisc/include/asm/processor.h

@@ -295,6 +295,8 @@ extern unsigned int toc_handler_csum;
 extern void do_cpu_irq_mask(struct pt_regs *);
 extern irqreturn_t timer_interrupt(int, void *);
 extern irqreturn_t ipi_interrupt(int, void *);
+extern void start_cpu_itimer(void);
+extern void handle_interruption(int, struct pt_regs *);
 
 /* called from assembly code: */
 extern void start_parisc(void);

arch/parisc/kernel/Makefile

@@ -21,6 +21,9 @@ CFLAGS_REMOVE_unwind.o = $(CC_FLAGS_FTRACE)
 CFLAGS_REMOVE_patch.o = $(CC_FLAGS_FTRACE)
 endif
 
+CFLAGS_REMOVE_sys_parisc.o = -Wmissing-prototypes -Wmissing-declarations
+CFLAGS_REMOVE_sys_parisc32.o = -Wmissing-prototypes -Wmissing-declarations
+
 obj-$(CONFIG_SMP)	+= smp.o
 obj-$(CONFIG_PA11)	+= pci-dma.o
 obj-$(CONFIG_PCI)	+= pci.o

arch/parisc/kernel/pdt.c

@@ -16,6 +16,7 @@
 #include <linux/memblock.h>
 #include <linux/seq_file.h>
 #include <linux/kthread.h>
+#include <linux/proc_fs.h>
 #include <linux/initrd.h>
 #include <linux/pgtable.h>
 #include <linux/mm.h>

arch/parisc/kernel/smp.c

@@ -271,8 +271,6 @@ void arch_send_call_function_single_ipi(int cpu)
 static void
 smp_cpu_init(int cpunum)
 {
-	extern void start_cpu_itimer(void); /* arch/parisc/kernel/time.c */
-
 	/* Set modes and Enable floating point coprocessor */
 	init_per_cpu(cpunum);
 

arch/parisc/kernel/unwind.c

@@ -221,7 +221,6 @@ static int unwind_special(struct unwind_frame_info *info, unsigned long pc, int
 	 * Note: We could use dereference_kernel_function_descriptor()
 	 * instead but we want to keep it simple here.
 	 */
-	extern void * const handle_interruption;
 	extern void * const ret_from_kernel_thread;
 	extern void * const syscall_exit;
 	extern void * const intr_return;
@@ -229,8 +228,10 @@ static int unwind_special(struct unwind_frame_info *info, unsigned long pc, int
 #ifdef CONFIG_IRQSTACKS
 	extern void * const _call_on_stack;
 #endif /* CONFIG_IRQSTACKS */
+	void *ptr;
 
-	if (pc_is_kernel_fn(pc, handle_interruption)) {
+	ptr = dereference_kernel_function_descriptor(&handle_interruption);
+	if (pc_is_kernel_fn(pc, ptr)) {
 		struct pt_regs *regs = (struct pt_regs *)(info->sp - frame_size - PT_SZ_ALGN);
 		dbg("Unwinding through handle_interruption()\n");
 		info->prev_sp = regs->gr[30];

arch/parisc/math-emu/Makefile

@@ -6,7 +6,8 @@
 # See arch/parisc/math-emu/README
 ccflags-y := -Wno-parentheses -Wno-implicit-function-declaration \
 	-Wno-uninitialized -Wno-strict-prototypes -Wno-return-type \
-	-Wno-implicit-int
+	-Wno-implicit-int -Wno-missing-prototypes -Wno-missing-declarations \
+	-Wno-old-style-definition -Wno-unused-but-set-variable
 
 obj-y	 := frnd.o driver.o decode_exc.o fpudispatch.o denormal.o \
 		dfmpy.o sfmpy.o sfsqrt.o dfsqrt.o dfadd.o fmpyfadd.o \

scripts/min-tool-version.sh

@@ -17,8 +17,8 @@ binutils)
 	echo 2.25.0
 	;;
 gcc)
-	if [ "$SRCARCH" = parisc ]; then
-		echo 11.0.0
+	if [ "$ARCH" = parisc64 ]; then
+		echo 12.0.0
 	else
 		echo 5.1.0
 	fi