We have been using PPC with a AMD flash (Spansion S29GL128M) on it for
our applications.  We are running Montavista linux on it.  Recently we
replaced the AMD flash with ST flash (M29W128FH).  The u-boot boots up
and during the kernel boot, I am getting the following error messages
and the system doesn't boot after this:
=20

jffs2_scan_eraseblock(): Magic bitmask 0x1985 not found at 0x00000000:
0x0020 instead
jffs2_scan_eraseblock(): Magic bitmask 0x1985 not found at 0x0000001c:
0x2212 instead
jffs2_scan_eraseblock(): Magic bitmask 0x1985 not found at 0x00000020:
0x0020 instead
jffs2_scan_eraseblock(): Magic bitmask 0x1985 not found at 0x0000003c:
0x2212 instead
jffs2_scan_eraseblock(): Magic bitmask 0x1985 not found at 0x00000040:
0x0020 instead
jffs2_scan_eraseblock(): Magic bitmask 0x1985 not found at 0x0000005c:
0x2212 instead
jffs2_scan_eraseblock(): Magic bitmask 0x1985 not found at 0x00000060:
0x0020 instead
=20
It would be really great if someone could let me know what is going
wrong in this.

This might be better answered at the jffs2 list which is linked off
here:  http://sourceware.org/jffs2/ 

Mikey