lib/math: avoid trailing newline hidden in pr_fmt()

pr_xxx() functions usually have a newline at the end of the logging
message.

Here, this newline is added via the 'pr_fmt' macro.

In order to be more consistent with other files, use a more standard
convention and put these newlines back in the messages themselves and
remove it from the pr_fmt macro.

While at it, use __func__ instead of hardcoding a function name in the
last message.
Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Cc: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: http://lkml.kernel.org/r/20200409163234.22830-1-christophe.jaillet@wanadoo.frSigned-off-by: Linus Torvalds <torvalds@linux-foundation.org>

lib/math/prime_numbers.c

 // SPDX-License-Identifier: GPL-2.0-only
-#define pr_fmt(fmt) "prime numbers: " fmt "\n"
+#define pr_fmt(fmt) "prime numbers: " fmt
 
 #include <linux/module.h>
 #include <linux/mutex.h>
@@ -253,7 +253,7 @@ static void dump_primes(void)
 
 	if (buf)
 		bitmap_print_to_pagebuf(true, buf, p->primes, p->sz);
-	pr_info("primes.{last=%lu, .sz=%lu, .primes[]=...x%lx} = %s",
+	pr_info("primes.{last=%lu, .sz=%lu, .primes[]=...x%lx} = %s\n",
 		p->last, p->sz, p->primes[BITS_TO_LONGS(p->sz) - 1], buf);
 
 	rcu_read_unlock();
@@ -273,7 +273,7 @@ static int selftest(unsigned long max)
 		bool fast = is_prime_number(x);
 
 		if (slow != fast) {
-			pr_err("inconsistent result for is-prime(%lu): slow=%s, fast=%s!",
+			pr_err("inconsistent result for is-prime(%lu): slow=%s, fast=%s!\n",
 			       x, slow ? "yes" : "no", fast ? "yes" : "no");
 			goto err;
 		}
@@ -282,14 +282,14 @@ static int selftest(unsigned long max)
 			continue;
 
 		if (next_prime_number(last) != x) {
-			pr_err("incorrect result for next-prime(%lu): expected %lu, got %lu",
+			pr_err("incorrect result for next-prime(%lu): expected %lu, got %lu\n",
 			       last, x, next_prime_number(last));
 			goto err;
 		}
 		last = x;
 	}
 
-	pr_info("selftest(%lu) passed, last prime was %lu", x, last);
+	pr_info("%s(%lu) passed, last prime was %lu\n", __func__, x, last);
 	return 0;
 
 err: