maccess: rename probe_kernel_{read,write} to copy_{from,to}_kernel_nofault

Better describe what these functions do.

Suggested-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

arch/riscv/kernel/ftrace.c

@@ -38,7 +38,8 @@ static int ftrace_check_current_call(unsigned long hook_pos,
 	 * Read the text we want to modify;
 	 * return must be -EFAULT on read error
 	 */
-	if (probe_kernel_read(replaced, (void *)hook_pos, MCOUNT_INSN_SIZE))
+	if (copy_from_kernel_nofault(replaced, (void *)hook_pos,
+			MCOUNT_INSN_SIZE))
 		return -EFAULT;
 
 	/*

arch/riscv/kernel/kgdb.c

@@ -153,7 +153,7 @@ int do_single_step(struct pt_regs *regs)
 	stepped_address = addr;
 
 	/* Replace the op code with the break instruction */
-	error = probe_kernel_write((void *)stepped_address,
+	error = copy_to_kernel_nofault((void *)stepped_address,
 				   arch_kgdb_ops.gdb_bpt_instr,
 				   BREAK_INSTR_SIZE);
 	/* Flush and return */
@@ -173,7 +173,7 @@ int do_single_step(struct pt_regs *regs)
 static void undo_single_step(struct pt_regs *regs)
 {
 	if (stepped_opcode != 0) {
-		probe_kernel_write((void *)stepped_address,
+		copy_to_kernel_nofault((void *)stepped_address,
 				   (void *)&stepped_opcode, BREAK_INSTR_SIZE);
 		flush_icache_range(stepped_address,
 				   stepped_address + BREAK_INSTR_SIZE);

arch/riscv/kernel/patch.c

@@ -63,7 +63,7 @@ static int patch_insn_write(void *addr, const void *insn, size_t len)
 
 	waddr = patch_map(addr, FIX_TEXT_POKE0);
 
-	ret = probe_kernel_write(waddr, insn, len);
+	ret = copy_to_kernel_nofault(waddr, insn, len);
 
 	patch_unmap(FIX_TEXT_POKE0);
 
@@ -76,7 +76,7 @@ NOKPROBE_SYMBOL(patch_insn_write);
 #else
 static int patch_insn_write(void *addr, const void *insn, size_t len)
 {
-	return probe_kernel_write(addr, insn, len);
+	return copy_to_kernel_nofault(addr, insn, len);
 }
 NOKPROBE_SYMBOL(patch_insn_write);
 #endif /* CONFIG_MMU */