linux-kernel - [PATCH 5/7] linux/bitmap.h: relax comment on compile-time constant nbits

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Message-Id: <20180818131623.8755-6-linux@rasmusvillemoes.dk>
Date:   Sat, 18 Aug 2018 15:16:21 +0200
From:   Rasmus Villemoes <linux@...musvillemoes.dk>
To:     Andrew Morton <akpm@...ux-foundation.org>,
        Yury Norov <ynorov@...iumnetworks.com>
Cc:     Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
        Rasmus Villemoes <linux@...musvillemoes.dk>,
        linux-kernel@...r.kernel.org
Subject: [PATCH 5/7] linux/bitmap.h: relax comment on compile-time constant nbits

It's not clear what's so horrible about emitting a function call to
handle a run-time sized bitmap. Moreover, gcc also emits a function call
for a compile-time-constant-but-huge nbits, so the comment isn't even
accurate.

Signed-off-by: Rasmus Villemoes <linux@...musvillemoes.dk>
---
 include/linux/bitmap.h | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/include/linux/bitmap.h b/include/linux/bitmap.h
index e34c361f4a92..3f0cac3aedca 100644
--- a/include/linux/bitmap.h
+++ b/include/linux/bitmap.h
@@ -28,8 +28,8 @@
  * The available bitmap operations and their rough meaning in the
  * case that the bitmap is a single unsigned long are thus:
  *
- * Note that nbits should be always a compile time evaluable constant.
- * Otherwise many inlines will generate horrible code.
+ * The generated code is more efficient when nbits is known at
+ * compile-time and at most BITS_PER_LONG.
  *
  * ::
  *
-- 
2.16.4