From: Hugh Dickins <hugh@veritas.com>
Hugh was hitting compiler bugs due to the use of alloc() in the bitmap
code. Work around it by eliminating the variable-sized arrays.
---
25-akpm/lib/bitmap.c | 8 ++++++--
1 files changed, 6 insertions(+), 2 deletions(-)
diff -puN lib/bitmap.c~bitmap-avoid-alloca lib/bitmap.c
--- 25/lib/bitmap.c~bitmap-avoid-alloca Mon Feb 2 12:55:52 2004
+++ 25-akpm/lib/bitmap.c Mon Feb 2 12:55:52 2004
@@ -12,6 +12,8 @@
#include <asm/bitops.h>
#include <asm/uaccess.h>
+#define MAX_BITMAP_BITS 512U /* for ia64 NR_CPUS maximum */
+
int bitmap_empty(const unsigned long *bitmap, int bits)
{
int k, lim = bits/BITS_PER_LONG;
@@ -73,8 +75,9 @@ void bitmap_shift_right(unsigned long *d
const unsigned long *src, int shift, int bits)
{
int k;
- DECLARE_BITMAP(__shr_tmp, bits);
+ DECLARE_BITMAP(__shr_tmp, MAX_BITMAP_BITS);
+ BUG_ON(bits > MAX_BITMAP_BITS);
bitmap_clear(__shr_tmp, bits);
for (k = 0; k < bits - shift; ++k)
if (test_bit(k + shift, src))
@@ -87,8 +90,9 @@ void bitmap_shift_left(unsigned long *ds
const unsigned long *src, int shift, int bits)
{
int k;
- DECLARE_BITMAP(__shl_tmp, bits);
+ DECLARE_BITMAP(__shl_tmp, MAX_BITMAP_BITS);
+ BUG_ON(bits > MAX_BITMAP_BITS);
bitmap_clear(__shl_tmp, bits);
for (k = bits; k >= shift; --k)
if (test_bit(k - shift, src))
_