CRIS: check for memory allocation

Add checking for allocated memory.  Indents and spaces are added to be
familiar with the kernel coding style.
Signed-off-by: Cyrill Gorcunov <gorcunov@gmail.com>
Acked-by: Mikael Starvik <starvik@axis.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

arch/cris/kernel/profile.c

@@ -17,28 +17,36 @@ cris_profile_sample(struct pt_regs* regs)
 {
 	if (!prof_running)
 		return;
+
 	if (user_mode(regs))
 		*(unsigned int*)sample_buffer_pos = current->pid;
 	else
 		*(unsigned int*)sample_buffer_pos = 0;
+
 	*(unsigned int*)(sample_buffer_pos + 4) = instruction_pointer(regs);
 	sample_buffer_pos += 8;
+
 	if (sample_buffer_pos == sample_buffer + SAMPLE_BUFFER_SIZE)
 		sample_buffer_pos = sample_buffer;
 }
 
 static ssize_t
-read_cris_profile(struct file *file, char __user *buf, size_t count, loff_t *ppos)
+read_cris_profile(struct file *file, char __user *buf,
+		  size_t count, loff_t *ppos)
 {
 	unsigned long p = *ppos;
+
 	if (p > SAMPLE_BUFFER_SIZE)
 		return 0;
+
 	if (p + count > SAMPLE_BUFFER_SIZE)
 		count = SAMPLE_BUFFER_SIZE - p;
 	if (copy_to_user(buf, sample_buffer + p,count))
 		return -EFAULT;
+
 	memset(sample_buffer + p, 0, count);
 	*ppos += count;
+
 	return count;
 }
 
@@ -59,14 +67,21 @@ static int
 __init init_cris_profile(void)
 {
 	struct proc_dir_entry *entry;
+
 	sample_buffer = kmalloc(SAMPLE_BUFFER_SIZE, GFP_KERNEL);
+	if (!sample_buffer) {
+		return -ENOMEM;
+	}
+
 	sample_buffer_pos = sample_buffer;
+
 	entry = create_proc_entry("system_profile", S_IWUSR | S_IRUGO, NULL);
 	if (entry) {
 		entry->proc_fops = &cris_proc_profile_operations;
 		entry->size = SAMPLE_BUFFER_SIZE;
 	}
 	prof_running = 1;
+
 	return 0;
 }