From e813a614007e3a8a7b53d976e86d9a20f21f81ad Mon Sep 17 00:00:00 2001
From: Peter Zijlstra <peterz@infradead.org>
Date: Fri, 17 Nov 2017 15:28:12 -0800
Subject: lib/int_sqrt: adjust comments

Our current int_sqrt() is not rough nor any approximation; it calculates
the exact value of: floor(sqrt()).  Document this.

Link: http://lkml.kernel.org/r/20171020164645.001652117@infradead.org
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Acked-by: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Anshul Garg <aksgarg1989@gmail.com>
Cc: Davidlohr Bueso <dave@stgolabs.net>
Cc: David Miller <davem@davemloft.net>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Joe Perches <joe@perches.com>
Cc: Kees Cook <keescook@chromium.org>
Cc: Matthew Wilcox <mawilcox@microsoft.com>
Cc: Michael Davidson <md@google.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Will Deacon <will.deacon@arm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---
 lib/int_sqrt.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

(limited to 'lib')

diff --git a/lib/int_sqrt.c b/lib/int_sqrt.c
index 67bb300b5b46..e2d329099bf7 100644
--- a/lib/int_sqrt.c
+++ b/lib/int_sqrt.c
@@ -11,10 +11,10 @@
 #include <linux/bitops.h>
 
 /**
- * int_sqrt - rough approximation to sqrt
+ * int_sqrt - computes the integer square root
  * @x: integer of which to calculate the sqrt
  *
- * A very rough approximation to the sqrt() function.
+ * Computes: floor(sqrt(x))
  */
 unsigned long int_sqrt(unsigned long x)
 {
-- 
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