releases/4.9.212/md-avoid-namespace-collision-with-bitmap-api.patch

From foo@baz Tue 28 Jan 2020 12:49:12 PM CET
Date: Tue, 28 Jan 2020 12:49:12 +0100
To: Greg KH <gregkh@linuxfoundation.org>
From: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Subject: md: Avoid namespace collision with bitmap API

From: Andy Shevchenko <andriy.shevchenko@linux.intel.com>

commit e64e4018d572710c44f42c923d4ac059f0a23320 upstream.

bitmap API (include/linux/bitmap.h) has 'bitmap' prefix for its methods.

On the other hand MD bitmap API is special case.
Adding 'md' prefix to it to avoid name space collision.

No functional changes intended.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Acked-by: Shaohua Li <shli@kernel.org>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
[only take the bitmap_free change for stable - gregkh]
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 drivers/md/bitmap.c |    8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

--- a/drivers/md/bitmap.c
+++ b/drivers/md/bitmap.c
@@ -1699,7 +1699,7 @@ void bitmap_flush(struct mddev *mddev)
 /*
  * free memory that was allocated
  */
-static void bitmap_free(struct bitmap *bitmap)
+static void md_bitmap_free(struct bitmap *bitmap)
 {
 	unsigned long k, pages;
 	struct bitmap_page *bp;
@@ -1749,7 +1749,7 @@ void bitmap_destroy(struct mddev *mddev)
 	if (mddev->thread)
 		mddev->thread->timeout = MAX_SCHEDULE_TIMEOUT;
 
-	bitmap_free(bitmap);
+	md_bitmap_free(bitmap);
 }
 
 /*
@@ -1834,7 +1834,7 @@ struct bitmap *bitmap_create(struct mdde
 
 	return bitmap;
  error:
-	bitmap_free(bitmap);
+	md_bitmap_free(bitmap);
 	return ERR_PTR(err);
 }
 
@@ -1936,7 +1936,7 @@ int bitmap_copy_from_slot(struct mddev *
 	*low = lo;
 	*high = hi;
 err:
-	bitmap_free(bitmap);
+	md_bitmap_free(bitmap);
 	return rv;
 }
 EXPORT_SYMBOL_GPL(bitmap_copy_from_slot);