The patch titled
md: ensure bitmap_writeback_daemon handles shutdown properly.
has been added to the -mm tree. Its filename is
md-ensure-bitmap_writeback_daemon-handles-shutdown-properly.patch
Patches currently in -mm which might be from [EMAIL PROTECTED] are
sunrpc-cache_register-can-use-wrong-module-reference.patch
md-fix-minor-error-in-raid10-read-balancing-calculation.patch
md-fail-io-request-to-md-that-require-a-barrier.patch
md-dont-allow-new-md-bitmap-file-to-be-set-if-one-already-exists.patch
md-improve-handling-of-bitmap-initialisation.patch
md-all-hot-add-and-hot-remove-of-md-intent-logging-bitmaps.patch
md-support-write-mostly-device-in-raid1.patch
md-add-write-behind-support-for-md-raid1.patch
md-support-md-linear-array-with-components-greater-than-2-terabytes.patch
md-raid1_quiesce-is-back-to-front-fix-it.patch
md-make-sure-bitmap_daemon_work-actually-does-work.patch
md-do-not-set-mddev-bitmap-until-bitmap-is-fully-initialised.patch
md-allow-hot-adding-devices-to-arrays-with-non-persistant-superblocks.patch
md-allow-md-to-load-a-superblock-with-feature-bit-1-set.patch
md-fix-bitmap-read_sb_page-so-that-it-handles-errors-properly.patch
md-remove-old-cruft-from-md_kh-header-file.patch
md-limit-size-of-sb-read-written-to-appropriate-amount.patch
md-add-write-intent-bitmap-support-to-raid5.patch
md-write-intent-bitmap-support-for-raid6.patch
md-use-kthread-infrastructure-in-md.patch
md-ensure-bitmap_writeback_daemon-handles-shutdown-properly.patch
md-tidy-up-daemon-stop-start-code-in-md-bitmapc.patch
drivers-md-fix-up-schedule_timeout-usage.patch
From: NeilBrown <[EMAIL PROTECTED]>
mddev->bitmap gets clearred before the writeback daemon is stopped. So the
write_back daemon needs to be careful not to dereference the 'bitmap' if it is
NULL.
Signed-off-by: Neil Brown <[EMAIL PROTECTED]>
Signed-off-by: Andrew Morton <[EMAIL PROTECTED]>
---
drivers/md/bitmap.c | 3 +++
1 files changed, 3 insertions(+)
diff -puN
drivers/md/bitmap.c~md-ensure-bitmap_writeback_daemon-handles-shutdown-properly
drivers/md/bitmap.c
---
devel/drivers/md/bitmap.c~md-ensure-bitmap_writeback_daemon-handles-shutdown-properly
2005-08-29 23:44:34.000000000 -0700
+++ devel-akpm/drivers/md/bitmap.c 2005-08-29 23:44:34.000000000 -0700
@@ -1156,6 +1156,9 @@ static void bitmap_writeback_daemon(mdde
err = -EINTR;
goto out;
}
+ if (bitmap == NULL)
+ /* about to be stopped. */
+ return;
PRINTK("%s: bitmap writeback daemon woke up...\n", bmname(bitmap));
/* wait on bitmap page writebacks */
_
-
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