Hi,
I just tried the yaffs snapshot with kernel 2.6.14, but failed to
compile the modules. I already patched the kernel  with latest
snapshot from MTD site.

The errors are follow:
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gcc -c -D__KERNEL__ -DMODULE  -DCONFIG_YAFFS_RAM_ENABLED
-DCONFIG_YAFFS_MTD_ENABLED -DCONFIG_YAFFS_USE_GENERIC_RW   
-DCONFIG_SHORT_NAMES_IN_RAM -DCONFIG_YAFFS_USE_NANDECC    -I
/usr/src/linux/include -O2 -Wall yaffs_fs.c -o yaffs_fs.o
In file included from /usr/src/linux/include/asm/processor.h:18,
                 from /usr/src/linux/include/asm/thread_info.h:17,
                 from /usr/src/linux/include/linux/thread_info.h:21,
                 from /usr/src/linux/include/linux/spinlock.h:53,
                 from /usr/src/linux/include/linux/capability.h:45,
                 from /usr/src/linux/include/linux/sched.h:7,
                 from /usr/src/linux/include/linux/module.h:10,
                 from yaffs_fs.c:38:
/usr/src/linux/include/asm/system.h: In function `__set_64bit_var':
/usr/src/linux/include/asm/system.h:211: warning: dereferencing
type-punned pointer will break strict-aliasing rules
/usr/src/linux/include/asm/system.h:211: warning: dereferencing
type-punned pointer will break strict-aliasing rules
In file included from /usr/src/linux/include/linux/irq.h:21,
                 from /usr/src/linux/include/asm/hardirq.h:6,
                 from /usr/src/linux/include/linux/hardirq.h:7,
                 from /usr/src/linux/include/linux/interrupt.h:11,
                 from /usr/src/linux/include/linux/rcuref.h:36,
                 from /usr/src/linux/include/linux/fs.h:12,
                 from yaffs_fs.c:43:
/usr/src/linux/include/asm/irq.h:16:25: irq_vectors.h: No such file or directory
In file included from /usr/src/linux/include/asm/hardirq.h:6,
                 from /usr/src/linux/include/linux/hardirq.h:7,
                 from /usr/src/linux/include/linux/interrupt.h:11,
                 from /usr/src/linux/include/linux/rcuref.h:36,
                 from /usr/src/linux/include/linux/fs.h:12,
                 from yaffs_fs.c:43:
/usr/src/linux/include/linux/irq.h: At top level:
/usr/src/linux/include/linux/irq.h:84: error: `NR_IRQS' undeclared
here (not in a function)
In file included from /usr/src/linux/include/linux/irq.h:93,
                 from /usr/src/linux/include/asm/hardirq.h:6,
                 from /usr/src/linux/include/linux/hardirq.h:7,
                 from /usr/src/linux/include/linux/interrupt.h:11,
                 from /usr/src/linux/include/linux/rcuref.h:36,
                 from /usr/src/linux/include/linux/fs.h:12,
                 from yaffs_fs.c:43:
/usr/src/linux/include/asm/hw_irq.h:30: error: `NR_IRQ_VECTORS'
undeclared here (not in a function)
yaffs_fs.c:168: warning: initialization from incompatible pointer type
yaffs_fs.c:200: warning: initialization from incompatible pointer type
yaffs_fs.c: In function `yaffs_readpage_nolock':
yaffs_fs.c:463: warning: implicit declaration of function `PAGE_BUG'
yaffs_fs.c: In function `yaffs_internal_read_super':
yaffs_fs.c:1317: error: structure has no member named `u'
yaffs_fs.c: At top level:
yaffs_fs.c:1542: error: redefinition of 'yaffs_fs_type'
yaffs_fs.c:1512: error: previous definition of 'yaffs_fs_type' was here
yaffs_fs.c:1548: error: `FS_SINGLE' undeclared here (not in a function)
yaffs_fs.c:1548: error: initializer element is not constant
yaffs_fs.c:1548: error: (near initialization for `yaffs_fs_type.fs_flags')
yaffs_fs.c: In function `init_yaffs_fs':
yaffs_fs.c:1683: error: `yaffs_ram_fs_type' undeclared (first use in
this function)
yaffs_fs.c:1683: error: (Each undeclared identifier is reported only once
yaffs_fs.c:1683: error: for each function it appears in.)
yaffs_fs.c: In function `exit_yaffs_fs':
yaffs_fs.c:1710: error: `yaffs_ram_fs_type' undeclared (first use in
this function)
yaffs_fs.c: At top level:
yaffs_fs.c:690: warning: 'yaffs_file_read' defined but not used
yaffs_fs.c:1512: warning: 'yaffs_fs_type' defined but not used
yaffs_fs.c:1562: warning: 'my_proc_ram_write_entry' defined but not used
yaffs_fs.c:1636: warning: 'yaffs_proc_ram_write' defined but not used
make: *** [yaffs_fs.o] Error 1
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This is for linux-module part. Have anyone meet the same problems? Or
do you know any reason of this error?


--
With best regards,
Nguyen