[LU-16116] Linux 5.17+ Configure tests for rhltable, bitmap_alloc, rdma_wr, nla_strdup

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

Description

rhel8.6 with kernel 5.18 breaks a couple of compile tests

struct rhltable test fails with:
... error: ‘hlt’ is used uninitialized in this function
[-Werror=uninitialized]

bitmap_alloc() test fails with:
... error: unused variable ‘map’ [-Werror=unused-variable]

rdma_wr() test failes with:
... error: assignment discards ‘const’ qualifier from pointer
target type [-Werror=discarded-qualifiers]
wr = rdma_wr(NULL);

nla_strdup() test fails due to unused variable 'tmp'

---

Linux commit v5.15-12273-gab2f9d2d3626
mm: unexport

{,un}

lock_page_memcg

Fails when lock_page_memcg exists but is not exported.

In file included from /home/shaun/lustre-release/lustre/include/lvfs.h:44,
                 from /home/shaun/lustre-release/lustre/include/obd.h:55,
                 from /home/shaun/lustre-release/lustre/llite/vvp_io.c:39:
/home/shaun/lustre-release/lustre/include/lustre_compat.h:468:31: error: expected identifier or ‘(’ before ‘do’
 #define lock_page_memcg(page) do {} while (0)
                               ^~
include/linux/memcontrol.h:946:6: note: in expansion of macro ‘lock_page_memcg’
 void lock_page_memcg(struct page *page);
      ^~~~~~~~~~~~~~~
/home/shaun/lustre-release/lustre/include/lustre_compat.h:468:37: error: expected identifier or ‘(’ before ‘while’
 #define lock_page_memcg(page) do {} while (0)
                                     ^~~~~
include/linux/memcontrol.h:946:6: note: in expansion of macro ‘lock_page_memcg’
 void lock_page_memcg(struct page *page);
      ^~~~~~~~~~~~~~~
/home/shaun/lustre-release/lustre/include/lustre_compat.h:469:33: error: expected identifier or ‘(’ before ‘do’
 #define unlock_page_memcg(page) do {} while (0)
                                 ^~
include/linux/memcontrol.h:947:6: note: in expansion of macro ‘unlock_page_memcg’
 void unlock_page_memcg(struct page *page);
      ^~~~~~~~~~~~~~~~~
/home/shaun/lustre-release/lustre/include/lustre_compat.h:469:39: error: expected identifier or ‘(’ before ‘while’
 #define unlock_page_memcg(page) do {} while (0)
                                       ^~~~~
include/linux/memcontrol.h:947:6: note: in expansion of macro ‘unlock_page_memcg’
 void unlock_page_memcg(struct page *page);
      ^~~~~~~~~~~~~~~~~

Adjust usage of [un]lock_page_memcg() to vvp_[un]lock_page_memcg() and
define the mapping accordingly to avoid the compile error.