[LU-16291] make kobj_type constant

• Type: Bug
• Resolution: Fixed
• Priority: Minor
• Fix Version/s: Lustre 2.16.0, Lustre 2.15.3
• Severity: 3
• Assignee: Jian Yu
• Reporter: Jian Yu

Description

Kernel v5.16-rc2-28-gee6d3dd4ed48:

commit ee6d3dd4ed48ab24b74bab3c3977b8218518247d
Author:     Wedson Almeida Filho <[e-mail]>
AuthorDate: Fri Dec 24 23:13:45 2021 +0000
Commit:     Greg Kroah-Hartman <[e-mail]>
CommitDate: Mon Dec 27 10:40:00 2021 +0100

    driver core: make kobj_type constant.
    
    This way instances of kobj_type (which contain function pointers) can be
    stored in .rodata, which means that they cannot be [easily/accidentally]
    modified at runtime.
    
    Signed-off-by: Wedson Almeida Filho <[e-mail]>
    Link: https://lore.kernel.org/r/[e-mail]
    Signed-off-by: Greg Kroah-Hartman <[e-mail]>

Lustre build failed:

lustre/obdclass/obd_config.c: In function 'class_modify_config':
lustre/obdclass/obd_config.c:1639:13: error: assignment discards 'const' qualifier from pointer target type [-Werror=discarded-qualifiers]
13:36:52  1639 |         typ = get_ktype(kobj);
13:36:52       |             ^
13:36:52 cc1: all warnings being treated as errors

Issue Links

• is related to: LU-16221 RHEL 9.1 support