Merge tag 'for-5.15/parisc' of git://git.kernel.org/pub/scm/linux/ker…

…nel/git/deller/parisc-linux

Pull parisc architecture updates from Helge Deller:

 - Fix a kernel crash when a signal is delivered to bad userspace stack

 - Fix fall-through warnings in math-emu code

 - Increase size of gcc stack frame check

 - Switch coding from 'pci_' to 'dma_' API

 - Make struct parisc_driver::remove() return void

 - Some parisc related Makefile changes

 - Minor cleanups, e.g. change to octal permissions, fix macro
   collisions, fix PMD_ORDER collision, replace spaces with tabs

* tag 'for-5.15/parisc' of git://git.kernel.org/pub/scm/linux/kernel/git/deller/parisc-linux:
  parisc: math-emu: Fix fall-through warnings
  parisc: fix crash with signals and alloca
  parisc: Fix compile failure when building 64-bit kernel natively
  parisc: ccio-dma.c: Added tab instead of spaces
  parisc/parport_gsc: switch from 'pci_' to 'dma_' API
  parisc: move core-y in arch/parisc/Makefile to arch/parisc/Kbuild
  parisc: switch from 'pci_' to 'dma_' API
  parisc: Make struct parisc_driver::remove() return void
  parisc: remove unused arch/parisc/boot/install.sh and its phony target
  parisc: Rename PMD_ORDER to PMD_TABLE_ORDER
  parisc: math-emu: Avoid "fmt" macro collision
  parisc: Increase size of gcc stack frame check
  parisc: Replace symbolic permissions with octal permissions

Makefile

@@ -404,6 +404,11 @@ ifeq ($(ARCH),sparc64)
        SRCARCH := sparc
 endif
 
+# Additional ARCH settings for parisc
+ifeq ($(ARCH),parisc64)
+       SRCARCH := parisc
+endif
+
 export cross_compiling :=
 ifneq ($(SRCARCH),$(SUBARCH))
 cross_compiling := 1

arch/parisc/Kbuild

@@ -1 +1,2 @@
 # SPDX-License-Identifier: GPL-2.0-only
+obj-y	+= mm/ kernel/ math-emu/

arch/parisc/Makefile

@@ -25,18 +25,18 @@ CHECKFLAGS	+= -D__hppa__=1
 ifdef CONFIG_64BIT
 UTS_MACHINE	:= parisc64
 CHECKFLAGS	+= -D__LP64__=1
-CC_ARCHES	= hppa64
 LD_BFD		:= elf64-hppa-linux
 else # 32-bit
-CC_ARCHES	= hppa hppa2.0 hppa1.1
 LD_BFD		:= elf32-hppa-linux
 endif
 
 # select defconfig based on actual architecture
-ifeq ($(shell uname -m),parisc64)
+ifeq ($(ARCH),parisc64)
 	KBUILD_DEFCONFIG := generic-64bit_defconfig
+	CC_ARCHES := hppa64
 else
 	KBUILD_DEFCONFIG := generic-32bit_defconfig
+	CC_ARCHES := hppa hppa2.0 hppa1.1
 endif
 
 export LD_BFD
@@ -111,9 +111,6 @@ KBUILD_CFLAGS	+= $(cflags-y)
 LIBGCC		:= $(shell $(CC) -print-libgcc-file-name)
 export LIBGCC
 
-kernel-y			:= mm/ kernel/ math-emu/
-
-core-y	+= $(addprefix arch/parisc/, $(kernel-y))
 libs-y	+= arch/parisc/lib/ $(LIBGCC)
 
 boot	:= arch/parisc/boot

arch/parisc/boot/Makefile

@@ -15,7 +15,3 @@ $(obj)/bzImage: $(obj)/compressed/vmlinux FORCE
 
 $(obj)/compressed/vmlinux: FORCE
 	$(Q)$(MAKE) $(build)=$(obj)/compressed $@
-
-install: $(CONFIGURE) $(obj)/bzImage
-	sh -x  $(srctree)/$(obj)/install.sh $(KERNELRELEASE) $(obj)/bzImage \
-	      System.map "$(INSTALL_PATH)"

arch/parisc/include/asm/parisc-device.h

@@ -34,8 +34,8 @@ struct parisc_driver {
 	struct parisc_driver *next;
 	char *name; 
 	const struct parisc_device_id *id_table;
-	int (*probe) (struct parisc_device *dev); /* New device discovered */
-	int (*remove) (struct parisc_device *dev);
+	int (*probe)(struct parisc_device *dev); /* New device discovered */
+	void (*remove)(struct parisc_device *dev);
 	struct device_driver drv;
 };
 

arch/parisc/include/asm/pgalloc.h

@@ -48,15 +48,15 @@ static inline pmd_t *pmd_alloc_one(struct mm_struct *mm, unsigned long address)
 {
 	pmd_t *pmd;
 
-	pmd = (pmd_t *)__get_free_pages(GFP_PGTABLE_KERNEL, PMD_ORDER);
+	pmd = (pmd_t *)__get_free_pages(GFP_PGTABLE_KERNEL, PMD_TABLE_ORDER);
 	if (likely(pmd))
-		memset ((void *)pmd, 0, PAGE_SIZE << PMD_ORDER);
+		memset ((void *)pmd, 0, PAGE_SIZE << PMD_TABLE_ORDER);
 	return pmd;
 }
 
 static inline void pmd_free(struct mm_struct *mm, pmd_t *pmd)
 {
-	free_pages((unsigned long)pmd, PMD_ORDER);
+	free_pages((unsigned long)pmd, PMD_TABLE_ORDER);
 }
 #endif
 

arch/parisc/include/asm/pgtable.h

@@ -112,7 +112,7 @@ static inline void purge_tlb_entries(struct mm_struct *mm, unsigned long addr)
 #define KERNEL_INITIAL_SIZE	(1 << KERNEL_INITIAL_ORDER)
 
 #if CONFIG_PGTABLE_LEVELS == 3
-#define PMD_ORDER	1
+#define PMD_TABLE_ORDER	1
 #define PGD_ORDER	0
 #else
 #define PGD_ORDER	1
@@ -131,7 +131,7 @@ static inline void purge_tlb_entries(struct mm_struct *mm, unsigned long addr)
 #define PMD_SHIFT       (PLD_SHIFT + BITS_PER_PTE)
 #define PMD_SIZE	(1UL << PMD_SHIFT)
 #define PMD_MASK	(~(PMD_SIZE-1))
-#define BITS_PER_PMD	(PAGE_SHIFT + PMD_ORDER - BITS_PER_PMD_ENTRY)
+#define BITS_PER_PMD	(PAGE_SHIFT + PMD_TABLE_ORDER - BITS_PER_PMD_ENTRY)
 #define PTRS_PER_PMD    (1UL << BITS_PER_PMD)
 #else
 #define BITS_PER_PMD	0

arch/parisc/kernel/signal.c

@@ -237,6 +237,12 @@ setup_rt_frame(struct ksignal *ksig, sigset_t *set, struct pt_regs *regs,
 #endif
 
 	usp = (regs->gr[30] & ~(0x01UL));
+#ifdef CONFIG_64BIT
+	if (is_compat_task()) {
+		/* The gcc alloca implementation leaves garbage in the upper 32 bits of sp */
+		usp = (compat_uint_t)usp;
+	}
+#endif
 	/*FIXME: frame_size parameter is unused, remove it. */
 	frame = get_sigframe(&ksig->ka, usp, sizeof(*frame));
 

arch/parisc/math-emu/decode_exc.c

@@ -46,7 +46,7 @@
 #define SIGNALCODE(signal, code) ((signal) << 24 | (code))
 #define copropbit	1<<31-2	/* bit position 2 */
 #define opclass		9	/* bits 21 & 22 */
-#define fmt		11	/* bits 19 & 20 */
+#define fmtbits		11	/* bits 19 & 20 */
 #define df		13	/* bits 17 & 18 */
 #define twobits		3	/* mask low-order 2 bits */
 #define fivebits	31	/* mask low-order 5 bits */
@@ -57,7 +57,7 @@
 #define Excp_instr(index) Instructionfield(Fpu_register[index])
 #define Clear_excp_register(index) Allexception(Fpu_register[index]) = 0
 #define Excp_format() \
-    (current_ir >> ((current_ir>>opclass & twobits)==1 ? df : fmt) & twobits)
+	(current_ir >> ((current_ir>>opclass & twobits) == 1 ? df : fmtbits) & twobits)
 
 /* Miscellaneous definitions */
 #define Fpu_sgl(index) Fpu_register[index*2]