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-rw-r--r--lib/bitmap.c12
1 files changed, 8 insertions, 4 deletions
diff --git a/lib/bitmap.c b/lib/bitmap.c
index 35a1f7ff4149..702565821c99 100644
--- a/lib/bitmap.c
+++ b/lib/bitmap.c
@@ -179,14 +179,16 @@ void __bitmap_shift_left(unsigned long *dst,
179} 179}
180EXPORT_SYMBOL(__bitmap_shift_left); 180EXPORT_SYMBOL(__bitmap_shift_left);
181 181
182void __bitmap_and(unsigned long *dst, const unsigned long *bitmap1, 182int __bitmap_and(unsigned long *dst, const unsigned long *bitmap1,
183 const unsigned long *bitmap2, int bits) 183 const unsigned long *bitmap2, int bits)
184{ 184{
185 int k; 185 int k;
186 int nr = BITS_TO_LONGS(bits); 186 int nr = BITS_TO_LONGS(bits);
187 unsigned long result = 0;
187 188
188 for (k = 0; k < nr; k++) 189 for (k = 0; k < nr; k++)
189 dst[k] = bitmap1[k] & bitmap2[k]; 190 result |= (dst[k] = bitmap1[k] & bitmap2[k]);
191 return result != 0;
190} 192}
191EXPORT_SYMBOL(__bitmap_and); 193EXPORT_SYMBOL(__bitmap_and);
192 194
@@ -212,14 +214,16 @@ void __bitmap_xor(unsigned long *dst, const unsigned long *bitmap1,
212} 214}
213EXPORT_SYMBOL(__bitmap_xor); 215EXPORT_SYMBOL(__bitmap_xor);
214 216
215void __bitmap_andnot(unsigned long *dst, const unsigned long *bitmap1, 217int __bitmap_andnot(unsigned long *dst, const unsigned long *bitmap1,
216 const unsigned long *bitmap2, int bits) 218 const unsigned long *bitmap2, int bits)
217{ 219{
218 int k; 220 int k;
219 int nr = BITS_TO_LONGS(bits); 221 int nr = BITS_TO_LONGS(bits);
222 unsigned long result = 0;
220 223
221 for (k = 0; k < nr; k++) 224 for (k = 0; k < nr; k++)
222 dst[k] = bitmap1[k] & ~bitmap2[k]; 225 result |= (dst[k] = bitmap1[k] & ~bitmap2[k]);
226 return result != 0;
223} 227}
224EXPORT_SYMBOL(__bitmap_andnot); 228EXPORT_SYMBOL(__bitmap_andnot);
225 229