Detailed revision comments:

r6424 | marko | 2010-01-12 12:22:19 +0200 (Tue, 12 Jan 2010) | 16 lines
branches/5.1: In innobase_initialize_autoinc(), do not attempt to read
the maximum auto-increment value from the table if
innodb_force_recovery is set to at least 4, so that writes are
disabled. (Bug #46193)

innobase_get_int_col_max_value(): Move the function definition before
ha_innobase::innobase_initialize_autoinc(), because that function now
calls this function.

ha_innobase::innobase_initialize_autoinc(): Change the return type to
void.  Do not attempt to read the maximum auto-increment value from
the table if innodb_force_recovery is set to at least 4.  Issue
ER_AUTOINC_READ_FAILED to the client when the auto-increment value
cannot be read.

rb://144 by Sunny, revised by Marko