lib: Move mathematic helpers to separate folder

For better maintenance and expansion move the mathematic helpers to the
separate folder.

No functional change intended.

Note, the int_sqrt() is not used as a part of lib, so, moved to regular
obj.

Link: http://lkml.kernel.org/r/20190323172531.80025-1-andriy.shevchenko@linux.intel.com
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
Cc: Randy Dunlap <rdunlap@infradead.org>
Cc: Thierry Reding <thierry.reding@gmail.com>
Cc: Lee Jones <lee.jones@linaro.org>
Cc: Daniel Thompson <daniel.thompson@linaro.org>
Cc: Ray Jui <rjui@broadcom.com>
[mchehab+samsung@kernel.org: fix broken doc references for div64.c and gcd.c]
  Link: http://lkml.kernel.org/r/734f49bae5d4052b3c25691dfefad59bea2e5843.1555580999.git.mchehab+samsung@kernel.org
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 0 insertions, 65 deletions

diff --git a/lib/rational.c b/lib/rational.c
deleted file mode 100644
index ba7443677c90..000000000000
--- a/lib/rational.c
+++ /dev/null
@@ -1,65 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-/*
- * rational fractions
- *
- * Copyright (C) 2009 emlix GmbH, Oskar Schirmer <oskar@scara.com>
- *
- * helper functions when coping with rational numbers
- */
-
-#include <linux/rational.h>
-#include <linux/compiler.h>
-#include <linux/export.h>
-
-/*
- * calculate best rational approximation for a given fraction
- * taking into account restricted register size, e.g. to find
- * appropriate values for a pll with 5 bit denominator and
- * 8 bit numerator register fields, trying to set up with a
- * frequency ratio of 3.1415, one would say:
- *
- * rational_best_approximation(31415, 10000,
- *		(1 << 8) - 1, (1 << 5) - 1, &n, &d);
- *
- * you may look at given_numerator as a fixed point number,
- * with the fractional part size described in given_denominator.
- *
- * for theoretical background, see:
- * http://en.wikipedia.org/wiki/Continued_fraction
- */
-
-void rational_best_approximation(
-	unsigned long given_numerator, unsigned long given_denominator,
-	unsigned long max_numerator, unsigned long max_denominator,
-	unsigned long *best_numerator, unsigned long *best_denominator)
-{
-	unsigned long n, d, n0, d0, n1, d1;
-	n = given_numerator;
-	d = given_denominator;
-	n0 = d1 = 0;
-	n1 = d0 = 1;
-	for (;;) {
-		unsigned long t, a;
-		if ((n1 > max_numerator) || (d1 > max_denominator)) {
-			n1 = n0;
-			d1 = d0;
-			break;
-		}
-		if (d == 0)
-			break;
-		t = d;
-		a = n / d;
-		d = n % d;
-		n = t;
-		t = n0 + a * n1;
-		n0 = n1;
-		n1 = t;
-		t = d0 + a * d1;
-		d0 = d1;
-		d1 = t;
-	}
-	*best_numerator = n1;
-	*best_denominator = d1;
-}
-
-EXPORT_SYMBOL(rational_best_approximation);