Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / arch / tile / lib / cpumask.c

diff --git a/kernel/arch/tile/lib/cpumask.c b/kernel/arch/tile/lib/cpumask.c
new file mode 100644 (file)
index 0000000..75947ed
--- /dev/null
+++ b/kernel/arch/tile/lib/cpumask.c
@@ -0,0 +1,54 @@
+/*
+ * 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>
+#include <linux/smp.h>
+#include <linux/export.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;
+}
+EXPORT_SYMBOL(bitmap_parselist_crop);