Sparseify MIPS.

Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

arch/mips/Makefile

@@ -52,6 +52,21 @@ ifdef CONFIG_CROSSCOMPILE
 CROSS_COMPILE		:= $(tool-prefix)
 endif
 
+CHECKFLAGS-y				+= -D__linux__ -D__mips__ \
+					   -D_ABIO32=1 \
+					   -D_ABIN32=2 \
+					   -D_ABI64=3
+CHECKFLAGS-$(CONFIG_32BIT)		+= -D_MIPS_SIM=_ABIO32 \
+					   -D_MIPS_SZLONG=32 \
+					   -D__PTRDIFF_TYPE__=int
+CHECKFLAGS-$(CONFIG_64BIT)		+= -m64 -D_MIPS_SIM=_ABI64 \
+					   -D_MIPS_SZLONG=64 \
+					   -D__PTRDIFF_TYPE__="long int"
+CHECKFLAGS-$(CONFIG_CPU_BIG_ENDIAN)	+= -D__MIPSEB__
+CHECKFLAGS-$(CONFIG_CPU_LITTLE_ENDIAN)	+= -D__MIPSEL__
+
+CHECKFLAGS				= $(CHECKFLAGS-y)
+
 ifdef CONFIG_BUILD_ELF64
 gas-abi			= 64
 ld-emul			= $(64bit-emul)

arch/mips/kernel/i8259.c

@@ -321,7 +321,7 @@ void __init init_i8259_irqs (void)
 
 	for (i = 0; i < 16; i++) {
 		irq_desc[i].status = IRQ_DISABLED;
-		irq_desc[i].action = 0;
+		irq_desc[i].action = NULL;
 		irq_desc[i].depth = 1;
 		irq_desc[i].handler = &i8259A_irq_type;
 	}

arch/mips/kernel/irixelf.c

@@ -147,7 +147,7 @@ static void padzero(unsigned long elf_bss)
 	nbyte = elf_bss & (PAGE_SIZE-1);
 	if (nbyte) {
 		nbyte = PAGE_SIZE - nbyte;
-		clear_user((void *) elf_bss, nbyte);
+		clear_user((void __user *) elf_bss, nbyte);
 	}
 }
 
@@ -878,10 +878,10 @@ static int load_irix_library(struct file *file)
  * phdrs there are in the USER_PHDRP array.  We return the vaddr the
  * first phdr was successfully mapped to.
  */
-unsigned long irix_mapelf(int fd, struct elf_phdr *user_phdrp, int cnt)
+unsigned long irix_mapelf(int fd, struct elf_phdr __user *user_phdrp, int cnt)
 {
 	unsigned long type, vaddr, filesz, offset, flags;
-	struct elf_phdr *hp;
+	struct elf_phdr __user *hp;
 	struct file *filp;
 	int i, retval;
 
@@ -968,9 +968,9 @@ unsigned long irix_mapelf(int fd, struct elf_phdr *user_phdrp, int cnt)
 /* These are the only things you should do on a core-file: use only these
  * functions to write out all the necessary info.
  */
-static int dump_write(struct file *file, const void *addr, int nr)
+static int dump_write(struct file *file, const void __user *addr, int nr)
 {
-	return file->f_op->write(file, (const char *) addr, nr, &file->f_pos) == nr;
+	return file->f_op->write(file, (const char __user *) addr, nr, &file->f_pos) == nr;
 }
 
 static int dump_seek(struct file *file, off_t off)
@@ -1204,7 +1204,7 @@ static int irix_core_dump(long signr, struct pt_regs * regs, struct file *file)
 		len = current->mm->arg_end - current->mm->arg_start;
 		len = len >= ELF_PRARGSZ ? ELF_PRARGSZ : len;
 		(void *) copy_from_user(&psinfo.pr_psargs,
-			       (const char *)current->mm->arg_start, len);
+			       (const char __user *)current->mm->arg_start, len);
 		for (i = 0; i < len; i++)
 			if (psinfo.pr_psargs[i] == 0)
 				psinfo.pr_psargs[i] = ' ';
@@ -1301,7 +1301,7 @@ static int irix_core_dump(long signr, struct pt_regs * regs, struct file *file)
 #ifdef DEBUG
 		printk("elf_core_dump: writing %08lx %lx\n", addr, len);
 #endif
-		DUMP_WRITE((void *)addr, len);
+		DUMP_WRITE((void __user *)addr, len);
 	}
 
 	if ((off_t) file->f_pos != offset) {

arch/mips/kernel/irixinv.c

@@ -30,18 +30,19 @@ void add_to_inventory (int class, int type, int controller, int unit, int state)
 	inventory_items++;
 }
 
-int dump_inventory_to_user (void *userbuf, int size)
+int dump_inventory_to_user (void __user *userbuf, int size)
 {
 	inventory_t *inv  = &inventory [0];
-	inventory_t *user = userbuf;
+	inventory_t __user *user = userbuf;
 	int v;
 
 	if (!access_ok(VERIFY_WRITE, userbuf, size))
 		return -EFAULT;
 
 	for (v = 0; v < inventory_items; v++){
 		inv = &inventory [v];
-		copy_to_user (user, inv, sizeof (inventory_t));
+		if (copy_to_user (user, inv, sizeof (inventory_t)))
+			return -EFAULT;
 		user++;
 	}
 	return inventory_items * sizeof (inventory_t);