1 files changed, 51 insertions, 0 deletions

diff --git a/arch/tile/lib/cpumask.c b/arch/tile/lib/cpumask.c
new file mode 100644
index 000000000000..af745b3b2559
--- /dev/null
+++ b/arch/tile/lib/cpumask.c
@@ -0,0 +1,51 @@
+/*
+ * Copyright 2010 Tilera Corporation. All Rights Reserved.
+ *
+ *   This program is free software; you can redistribute it and/or
+ *   modify it under the terms of the GNU General Public License
+ *   as published by the Free Software Foundation, version 2.
+ *
+ *   This program is distributed in the hope that it will be useful, but
+ *   WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
+ *   NON INFRINGEMENT.  See the GNU General Public License for
+ *   more details.
+ */
+
+#include <linux/cpumask.h>
+#include <linux/ctype.h>
+#include <linux/errno.h>
+
+/*
+ * Allow cropping out bits beyond the end of the array.
+ * Move to "lib" directory if more clients want to use this routine.
+ */
+int bitmap_parselist_crop(const char *bp, unsigned long *maskp, int nmaskbits)
+{
+        unsigned a, b;
+
+        bitmap_zero(maskp, nmaskbits);
+        do {
+                if (!isdigit(*bp))
+                        return -EINVAL;
+                a = simple_strtoul(bp, (char **)&bp, 10);
+                b = a;
+                if (*bp == '-') {
+                        bp++;
+                        if (!isdigit(*bp))
+                                return -EINVAL;
+                        b = simple_strtoul(bp, (char **)&bp, 10);
+                }
+                if (!(a <= b))
+                        return -EINVAL;
+                if (b >= nmaskbits)
+                        b = nmaskbits-1;
+                while (a <= b) {
+                        set_bit(a, maskp);
+                        a++;
+                }
+                if (*bp == ',')
+                        bp++;
+        } while (*bp != '\0' && *bp != '\n');
+        return 0;
+}