The patch titled
mm-only-i_size_write-debugging
has been added to the -mm tree. Its filename is
mm-only-i_size_write-debugging.patch
See http://www.zip.com.au/~akpm/linux/patches/stuff/added-to-mm.txt to find
out what to do about this
------------------------------------------------------
Subject: mm-only-i_size_write-debugging
From: Andrew Morton <akpm@xxxxxxxx>
i_size_write() requires i_mutex.
Cc: Jiri Kosina <jikos@xxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxx>
---
fs/inode.c | 17 +++++++++++++++++
include/linux/fs.h | 20 +-------------------
2 files changed, 18 insertions(+), 19 deletions(-)
diff -puN fs/inode.c~mm-only-i_size_write-debugging fs/inode.c
--- a/fs/inode.c~mm-only-i_size_write-debugging
+++ a/fs/inode.c
@@ -1384,6 +1384,23 @@ void __init inode_init(unsigned long mem
INIT_HLIST_HEAD(&inode_hashtable[loop]);
}
+void i_size_write(struct inode *inode, loff_t i_size)
+{
+ WARN_ON_ONCE(!mutex_is_locked(&inode->i_mutex));
+#if BITS_PER_LONG==32 && defined(CONFIG_SMP)
+ write_seqcount_begin(&inode->i_size_seqcount);
+ inode->i_size = i_size;
+ write_seqcount_end(&inode->i_size_seqcount);
+#elif BITS_PER_LONG==32 && defined(CONFIG_PREEMPT)
+ preempt_disable();
+ inode->i_size = i_size;
+ preempt_enable();
+#else
+ inode->i_size = i_size;
+#endif
+}
+EXPORT_SYMBOL(i_size_write);
+
void init_special_inode(struct inode *inode, umode_t mode, dev_t rdev)
{
inode->i_mode = mode;
diff -puN include/linux/fs.h~mm-only-i_size_write-debugging include/linux/fs.h
--- a/include/linux/fs.h~mm-only-i_size_write-debugging
+++ a/include/linux/fs.h
@@ -646,25 +646,7 @@ static inline loff_t i_size_read(const s
#endif
}
-/*
- * NOTE: unlike i_size_read(), i_size_write() does need locking around it
- * (normally i_mutex), otherwise on 32bit/SMP an update of i_size_seqcount
- * can be lost, resulting in subsequent i_size_read() calls spinning forever.
- */
-static inline void i_size_write(struct inode *inode, loff_t i_size)
-{
-#if BITS_PER_LONG==32 && defined(CONFIG_SMP)
- write_seqcount_begin(&inode->i_size_seqcount);
- inode->i_size = i_size;
- write_seqcount_end(&inode->i_size_seqcount);
-#elif BITS_PER_LONG==32 && defined(CONFIG_PREEMPT)
- preempt_disable();
- inode->i_size = i_size;
- preempt_enable();
-#else
- inode->i_size = i_size;
-#endif
-}
+void i_size_write(struct inode *inode, loff_t i_size);
static inline unsigned iminor(const struct inode *inode)
{
_
Patches currently in -mm which might be from akpm@xxxxxxxx are
origin.patch
revert-pci-quirk-for-ibm-dock-ii-cardbus-controllers.patch
separate-bdi-congestion-functions-from-queue-congestion-functions.patch
separate-bdi-congestion-functions-from-queue-congestion-functions-inline-stuff.patch
acpimemory-hotplug-remove-strange-add_memory-fail-message-tidy.patch
revert-generic_file_buffered_write-handle-zero-length-iovec-segments.patch
revert-generic_file_buffered_write-deadlock-on-vectored-write.patch
generic_file_buffered_write-cleanup.patch
mm-fix-pagecache-write-deadlocks.patch
i386-acpi-build-fix.patch
acpi-cpufreq-remove-dead-code.patch
acpi-asus-s3-resume-fix.patch
sony_apci-resume.patch
speedstep-centrino-remove-dead-code.patch
revert-gregkh-driver-driver-core-fixes-sysfs_create_group-retval-in-topology.c.patch
git-dvb.patch
git-dvb-fixup.patch
git-ia64.patch
git-input-fixup.patch
git-libata-all.patch
mtd-maps-support-for-bios-flash-chips-on-intel-esb2-southbridge.patch
git-netdev-all.patch
libphy-dont-do-that.patch
drivers-net-ns83820c-add-paramter-to-disable-auto.patch
git-pcmcia-fixup.patch
git-serial-fixup.patch
revert-gregkh-pci-pci-check-that-mwi-bit-really-did-get-set.patch
git-scsi-target-fixup.patch
git-scsi-target-vs-git-block.patch
usb-gadget-net2280-handle-sysfs-errors-fix.patch
git-watchdog.patch
x86_64-dump_trace-atomicity-fix.patch
unwinder-speedup-tweaks.patch
xfs-rename-uio_read.patch
touchkit-ps-2-touchscreen-driver.patch
get-rid-of-zone_table.patch
new-scheme-to-preempt-swap-token-tidy.patch
balance_pdgat-cleanup.patch
radix-tree-rcu-lockless-readside.patch
acx1xx-wireless-driver.patch
swsusp-add-resume_offset-command-line-parameter-rev-2.patch
deprecate-smbfs-in-favour-of-cifs.patch
edac-new-opteron-athlon64-memory-controller-driver.patch
kbuild-dont-put-temp-files-in-the-source-tree.patch
lockdep-annotate-nfs-nfsd-in-kernel-sockets-tidy.patch
drivers-add-lcd-support-3-Kconfig-fix.patch
fsstack-introduce-fsstack_copy_attrinode_-tidy.patch
bug-test-1.patch
log2-implement-a-general-integer-log2-facility-in-the-kernel-fix.patch
log2-implement-a-general-integer-log2-facility-in-the-kernel-vs-git-cryptodev.patch
add-process_session-helper-routine-deprecate-old-field-tidy.patch
fs-cache-provide-a-filesystem-specific-syncable-page-bit-ext4.patch
fs-cache-make-kafs-use-fs-cache-fix.patch
fs-cache-make-kafs-use-fs-cache-vs-streamline-generic_file_-interfaces-and-filemap.patch
nfs-use-local-caching-12-fix.patch
fs-cache-cachefiles-a-cache-that-backs-onto-a-mounted-filesystem-log2-fix.patch
swap_prefetch-vs-zoned-counters.patch
readahead-sysctl-parameters.patch
make-copy_from_user_inatomic-not-zero-the-tail-on-i386-vs-reiser4.patch
make-kmem_cache_destroy-return-void-reiser4.patch
reiser4-hardirq-include-fix.patch
reiser4-run-truncate_inode_pages-in-reiser4_delete_inode.patch
reiser4-get_sb_dev-fix.patch
reiser4-vs-zoned-allocator.patch
hpt3xx-rework-rate-filtering-tidy.patch
gtod-persistent-clock-support-i386.patch
hrtimers-state-tracking.patch
clockevents-drivers-for-i386.patch
gtod-mark-tsc-unusable-for-highres-timers.patch
round_jiffies-infrastructure-fix.patch
kevent-core-files-fix.patch
kevent-core-files-s390-hack.patch
kevent-socket-notifications-fix-2.patch
kevent-socket-notifications-fix-4.patch
kevent-timer-notifications-fix.patch
nr_blockdev_pages-in_interrupt-warning.patch
device-suspend-debug.patch
mutex-subsystem-synchro-test-module-fix.patch
slab-leaks3-default-y.patch
x86-kmap_atomic-debugging.patch
restore-rogue-readahead-printk.patch
put_bh-debug.patch
acpi_format_exception-debug.patch
mm-only-i_size_write-debugging.patch
jmicron-warning-fix.patch
squash-ipc-warnings.patch
squash-udf-warnings.patch
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