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kernel: yaffs: use new_sync_{read,write} for 3.18+
author
Gabor Juhos
<juhosg@openwrt.org>
Wed, 25 Mar 2015 08:59:12 +0000
(08:59 +0000)
committer
Gabor Juhos
<juhosg@openwrt.org>
Wed, 25 Mar 2015 08:59:12 +0000
(08:59 +0000)
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
No differences found