On Sun, Mar 28, 2004 at 07:30:22PM +0200, Thomas Steudten wrote:
> Looks like the well known bad assembler code with gcc.
> On the alpha you see the problem first in the
> raid1_read_balance() code sequence..
Very likely.
> You should use gcc 3.3.2 better 3.3.3.
Also, here is a hack (originally from Jay Estabrook) which
should work around a bug in older compilers.
Ivan.
--- linux.orig/drivers/md/raid1.c Thu Feb 5 14:11:04 2004
+++ linux/drivers/md/raid1.c Sun Mar 28 22:13:33 2004
@@ -487,6 +487,12 @@ static int raid1_read_balance (raid1_con
goto rb_out;
+#if defined(CONFIG_ALPHA) && ((__GNUC__ < 3) || \
+ ((__GNUC__ == 3) && (__GNUC_MINOR__ < 3)))
+ /* Work around a compiler bug in older gcc */
+ new_disk = *(volatile int *)&new_disk;
+#endif
+
/* make sure that disk is operational */
while( !conf->mirrors[new_disk].operational) {
if (new_disk <= 0) new_disk = conf->raid_disks;
@@ -544,6 +550,11 @@ static int raid1_read_balance (raid1_con
/* Find the disk which is closest */
+#if defined(CONFIG_ALPHA) && ((__GNUC__ < 3) || \
+ ((__GNUC__ == 3) && (__GNUC_MINOR__ < 3)))
+ /* Work around a compiler bug in older gcc */
+ disk = *(volatile int *)&disk;
+#endif
do {
if (disk <= 0)
disk = conf->raid_disks;
-
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