[PATCH v4 8/8] bitmap: move bitmap_*_region() functions to bitmap.h

[Yury Norov]

Now that bitmap_*_region() functions are implemented as thin wrappers
around others, it's worth to move them to the header, as it opens room
for compile-time optimizations.

CC: Andy Shevchenko <andriy.shevchenko@xxxxxxxxxxxxxxx>
CC: Rasmus Villemoes <linux@xxxxxxxxxxxxxxxxxx>
Signed-off-by: Yury Norov <yury.norov@xxxxxxxxx>
---
 include/linux/bitmap.h | 63 ++++++++++++++++++++++++++++++++++++++++--
 lib/bitmap.c           | 63 ------------------------------------------
 2 files changed, 60 insertions(+), 66 deletions(-)

diff --git a/include/linux/bitmap.h b/include/linux/bitmap.h
index 1516ff979315..973ae5b11c70 100644
--- a/include/linux/bitmap.h
+++ b/include/linux/bitmap.h
@@ -216,9 +216,6 @@ void bitmap_onto(unsigned long *dst, const unsigned long *orig,
 		const unsigned long *relmap, unsigned int bits);
 void bitmap_fold(unsigned long *dst, const unsigned long *orig,
 		unsigned int sz, unsigned int nbits);
-int bitmap_find_free_region(unsigned long *bitmap, unsigned int bits, int order);
-void bitmap_release_region(unsigned long *bitmap, unsigned int pos, int order);
-int bitmap_allocate_region(unsigned long *bitmap, unsigned int pos, int order);
 
 int bitmap_print_to_pagebuf(bool list, char *buf,
 				   const unsigned long *maskp, int nmaskbits);
@@ -594,6 +591,66 @@ static inline void bitmap_set_value8(unsigned long *map, unsigned long value,
 	map[index] |= value << offset;
 }
 
+/**
+ * bitmap_release_region - release allocated bitmap region
+ *	@bitmap: array of unsigned longs corresponding to the bitmap
+ *	@pos: beginning of bit region to release
+ *	@order: region size (log base 2 of number of bits) to release
+ *
+ * This is the complement to __bitmap_find_free_region() and releases
+ * the found region (by clearing it in the bitmap).
+ */
+static inline void bitmap_release_region(unsigned long *bitmap, unsigned int pos, int order)
+{
+	bitmap_clear(bitmap, pos, pos + BIT(order));
+}
+
+/**
+ * bitmap_allocate_region - allocate bitmap region
+ *	@bitmap: array of unsigned longs corresponding to the bitmap
+ *	@pos: beginning of bit region to allocate
+ *	@order: region size (log base 2 of number of bits) to allocate
+ *
+ * Allocate (set bits in) a specified region of a bitmap.
+ *
+ * Return: 0 on success, or %-EBUSY if specified region wasn't
+ * free (not all bits were zero).
+ */
+static inline int bitmap_allocate_region(unsigned long *bitmap, unsigned int pos, int order)
+{
+	unsigned int len = BIT(order);
+
+	if (find_next_bit(bitmap, pos + len, pos) < pos + len)
+		return -EBUSY;
+	bitmap_set(bitmap, pos, len);
+	return 0;
+}
+
+/*
+ * bitmap_find_free_region - find a contiguous aligned mem region
+ *	@bitmap: array of unsigned longs corresponding to the bitmap
+ *	@bits: number of bits in the bitmap
+ *	@order: region size (log base 2 of number of bits) to find
+ *
+ * Find a region of free (zero) bits in a @bitmap of @bits bits and
+ * allocate them (set them to one).  Only consider regions of length
+ * a power (@order) of two, aligned to that power of two, which
+ * makes the search algorithm much faster.
+ *
+ * Return: the bit offset in bitmap of the allocated region,
+ * or -errno on failure.
+ */
+static inline int bitmap_find_free_region(unsigned long *bitmap, unsigned int bits, int order)
+{
+	unsigned int pos, end;		/* scans bitmap by regions of size order */
+
+	for (pos = 0; (end = pos + BIT(order)) <= bits; pos = end) {
+		if (!bitmap_allocate_region(bitmap, pos, order))
+			return pos;
+	}
+	return -ENOMEM;
+}
+
 #endif /* __ASSEMBLY__ */
 
 #endif /* __LINUX_BITMAP_H */
diff --git a/lib/bitmap.c b/lib/bitmap.c
index ab730ce52d21..65a6d5d47d81 100644
--- a/lib/bitmap.c
+++ b/lib/bitmap.c
@@ -1220,69 +1220,6 @@ void bitmap_fold(unsigned long *dst, const unsigned long *orig,
 }
 #endif /* CONFIG_NUMA */
 
-/**
- * bitmap_find_free_region - find a contiguous aligned mem region
- *	@bitmap: array of unsigned longs corresponding to the bitmap
- *	@bits: number of bits in the bitmap
- *	@order: region size (log base 2 of number of bits) to find
- *
- * Find a region of free (zero) bits in a @bitmap of @bits bits and
- * allocate them (set them to one).  Only consider regions of length
- * a power (@order) of two, aligned to that power of two, which
- * makes the search algorithm much faster.
- *
- * Return: the bit offset in bitmap of the allocated region,
- * or -errno on failure.
- */
-int bitmap_find_free_region(unsigned long *bitmap, unsigned int bits, int order)
-{
-	unsigned int pos, end;		/* scans bitmap by regions of size order */
-
-	for (pos = 0; (end = pos + BIT(order)) <= bits; pos = end) {
-		if (!bitmap_allocate_region(bitmap, pos, order))
-			return pos;
-	}
-	return -ENOMEM;
-}
-EXPORT_SYMBOL(bitmap_find_free_region);
-
-/**
- * bitmap_release_region - release allocated bitmap region
- *	@bitmap: array of unsigned longs corresponding to the bitmap
- *	@pos: beginning of bit region to release
- *	@order: region size (log base 2 of number of bits) to release
- *
- * This is the complement to __bitmap_find_free_region() and releases
- * the found region (by clearing it in the bitmap).
- */
-void bitmap_release_region(unsigned long *bitmap, unsigned int pos, int order)
-{
-	bitmap_clear(bitmap, pos, pos + BIT(order));
-}
-EXPORT_SYMBOL(bitmap_release_region);
-
-/**
- * bitmap_allocate_region - allocate bitmap region
- *	@bitmap: array of unsigned longs corresponding to the bitmap
- *	@pos: beginning of bit region to allocate
- *	@order: region size (log base 2 of number of bits) to allocate
- *
- * Allocate (set bits in) a specified region of a bitmap.
- *
- * Return: 0 on success, or %-EBUSY if specified region wasn't
- * free (not all bits were zero).
- */
-int bitmap_allocate_region(unsigned long *bitmap, unsigned int pos, int order)
-{
-	unsigned int len = BIT(order);
-
-	if (find_next_bit(bitmap, pos + len, pos) < pos + len)
-		return -EBUSY;
-	bitmap_set(bitmap, pos, len);
-	return 0;
-}
-EXPORT_SYMBOL(bitmap_allocate_region);
-
 unsigned long *bitmap_alloc(unsigned int nbits, gfp_t flags)
 {
 	return kmalloc_array(BITS_TO_LONGS(nbits), sizeof(unsigned long),
-- 
2.39.2