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Using the do_sync_{read,write} functions in conjunction
with the generic_file_{read,write}_iter causes a kernel
panic like this:
root@OpenWrt:/# mount -t yaffs /dev/mtdblock5 /mnt
[ 2884.110000] yaffs: dev is 32505861 name is "mtdblock5" rw
[ 2884.120000] yaffs: passed flags ""
root@OpenWrt:/# hexdump -vC -n 64 /mnt/kernel
[ 2902.700000] CPU 0 Unable to handle kernel paging request at virtual \
address 00000000, epc == 00000000, ra == 80129414
[ 2902.710000] Oops[#1]:
[ 2902.710000] CPU: 0 PID: 1030 Comm: hexdump Not tainted 3.18.9 #2
[ 2902.710000] task: 878e7a20 ti: 868c6000 task.ti: 868c6000
[ 2902.710000] $ 0 : 00000000 fffffff8 00000000 00000000
[ 2902.710000] $ 4 : 868c7e70 868c7ea8 00000001 868c7f08
[ 2902.710000] $ 8 : 00000038 80064f18 80072280 00000000
[ 2902.710000] $12 : 7fa152b8 7709e3a0 00c42008 7709e3a0
[ 2902.710000] $16 : 868c7f08 86a46000 00000010 878e7a20
[ 2902.710000] $20 : 7705c4b0 00000010 00000000 00000000
[ 2902.710000] $24 : 770960bc 7707dd78
[ 2902.710000] $28 : 868c6000 868c7e58 7f8e7030 80129414
[ 2902.710000] Hi : 00000000
[ 2902.710000] Lo : ffffffff
[ 2902.710000] epc : 00000000 (null)
[ 2902.710000] Not tainted
[ 2902.710000] ra : 80129414 do_sync_read+0x7c/0xb4
[ 2902.710000] Status: 1900dc03 KERNEL EXL IE
[ 2902.710000] Cause : 00800008
[ 2902.710000] BadVA : 00000000
[ 2902.710000] PrId : 00019750 (MIPS 74Kc)
Change the yaffs code to use the new_sync_{read,write} functions
instead.
Signed-off-by: Gabor Juhos <juhosg@openwrt.org>
SVN-Revision: 44974
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