From: Bernhard Walle <bwalle@suse.de>
Subject: [PATCH] Fix "memset fails with 'mbind: Invalid argument'" on PPC64
References: bnc #455977

Backport of
https://bugzilla.novell.com/attachment.cgi?id=264645


Signed-off-by: Bernhard Walle <bwalle@suse.de>

---
 libnuma.c |   56 +++++++++++++++++++++++++++++++++++++++++++++-----------
 numaint.h |    1 +
 2 files changed, 46 insertions(+), 11 deletions(-)

--- a/libnuma.c
+++ b/libnuma.c
@@ -69,12 +69,37 @@ static int maxprocnode = -1;
 static int maxproccpu = -1;
 static int nodemask_sz = 0;
 static int cpumask_sz = 0;
+static int is_bigendian_64;
 
 int numa_exit_on_error = 0;
 int numa_exit_on_warn = 0;
 static void set_sizes(void);
 
 /*
+ * return 1 if this machine is big-endian 64-bit
+ */
+int
+big_endian64()
+{
+	union {
+		struct {
+			int a;
+			int b;
+		} ints;
+		struct {
+			long a;
+		} lng;
+	} ua;
+	if (sizeof(long) != 8)
+		return 0;
+	ua.ints.a = 0;
+	ua.ints.b = 3;
+	if (ua.lng.a == 3)
+		return 1;
+	return 0;
+}
+
+/*
  * There are two special functions, _init(void) and _fini(void), which
  * are called automatically by the dynamic loader whenever a library is loaded.
  *
@@ -91,6 +116,7 @@ numa_init(void)
         for (i = 0; i < max; i++)
                 nodemask_set_compat((nodemask_t *)&numa_all_nodes, i);
 	memset(&numa_no_nodes, 0, sizeof(numa_no_nodes));
+	is_bigendian_64 = big_endian64();
 }
 
 /*
@@ -103,10 +129,18 @@ numa_init(void)
 static unsigned int
 _getbit(const struct bitmask *bmp, unsigned int n)
 {
-	if (n < bmp->size)
-		return (bmp->maskp[n/bitsperlong] >> (n % bitsperlong)) & 1;
-	else
-		return 0;
+	unsigned long *ip;
+
+        if (n < bmp->size) {
+		if (is_bigendian_64) {
+			ip = bmp->maskp;
+                	return (ip[n/bitsperlong] >>
+				(n % bitsperlong)) & 1;
+		} else
+                	return (bmp->maskp[n/bitsperlong] >>
+				(n % bitsperlong)) & 1;
+        } else
+                return 0;
 }
 
 static void
@@ -372,10 +406,10 @@ read_mask(char *s, struct bitmask *bmp)
 {
 	char *end = s;
 	char *prevend;
-	unsigned int *start = (unsigned int *)bmp->maskp;
-	unsigned int *p = start;
-	unsigned int *q;
-	unsigned int i;
+	unsigned long *start = (unsigned long *)bmp->maskp;
+	unsigned long *p = start;
+	unsigned long *q;
+	unsigned long i;
 	unsigned int n = 0;
 
 	i = strtoul(s, &end, 16);
@@ -404,21 +438,21 @@ read_mask(char *s, struct bitmask *bmp)
 	 * is the highest and we put it first because we read it first.
 	 */
 	for (q = start + n, p = start; p < q; q--, p++) {
-		unsigned int x = *q;
+		unsigned long x = *q;
 
 		*q = *p;
 		*p = x;
 	}
 
 	/* Poor mans fls() */
-	for(i = 31; i >= 0; i--)
+	for(i = sizeof(unsigned long)*8 - 1; i >= 0; i--)
 		if (test_bit(i, start + n))
 			break;
 
 	/*
 	 * Return the last bit set
 	 */
-	return ((sizeof(unsigned int)*8) * n) + i;
+	return ((sizeof(unsigned long)*8) * n) + i;
 }
 
 /*
--- a/numaint.h
+++ b/numaint.h
@@ -32,6 +32,7 @@ enum numa_warn {
 }; 
 
 #define howmany(x,y) (((x)+((y)-1))/(y))
+#define bitsperint  (8 * sizeof(unsigned int))
 #define bitsperlong (8 * sizeof(unsigned long))
 #define longsperbits(n) howmany(n, bitsperlong)
 #define bytesperbits(x) ((x+7)/8)