ACPI: Fix thermal shutdowns

[karo-tx-linux.git] / lib / bitmap.c

diff --git a/lib/bitmap.c b/lib/bitmap.c
index 482df94ea21eb3e9ab7b2ef4efe88643147c3d80..06fb57c86de07007dad10f4bbeb3b1adcc0742c4 100644 (file)
--- a/lib/bitmap.c
+++ b/lib/bitmap.c
@@ -315,6 +315,17 @@ int bitmap_scnprintf(char *buf, unsigned int buflen,
 }
 EXPORT_SYMBOL(bitmap_scnprintf);
 
+/**
+ * bitmap_scnprintf_len - return buffer length needed to convert
+ * bitmap to an ASCII hex string
+ * @nr_bits: number of bits to be converted
+ */
+int bitmap_scnprintf_len(unsigned int nr_bits)
+{
+       unsigned int nr_nibbles = ALIGN(nr_bits, 4) / 4;
+       return nr_nibbles + ALIGN(nr_nibbles, CHUNKSZ / 4) / (CHUNKSZ / 4) - 1;
+}
+
 /**
  * __bitmap_parse - convert an ASCII hex string into a bitmap.
  * @buf: pointer to buffer containing string.