[LU-18892] page_cache_alloc undefined on Ubuntu 24.04.2, kernel 6.11.0

• Type: Bug
• Resolution: Unresolved
• Priority: Minor
• Severity: 3
• Assignee: WC Triage
• Reporter: Robert Read

Description

Compiling Lustre client on current Ubuntu 24.04.2:

/home/rread/pub-src/lustre-release/lustre/llite/file.c: In function ‘ll_dir_finish_open’:
/home/rread/pub-src/lustre-release/lustre/llite/file.c:678:24: error: implicit declaration of function ‘page_cache_alloc’; did you mean ‘kmem_cache_alloc’? [-Werror=implicit-function-declaration]
  678 |                 page = page_cache_alloc(inode->i_mapping);
      |                        ^~~~~~~~~~~~~~~~
      |                        kmem_cache_alloc
/home/rread/pub-src/lustre-release/lustre/llite/file.c:678:22: error: assignment to ‘struct page *’ from ‘int’ makes pointer from integer without a cast [-Werror=int-conversion]
  678 |                 page = page_cache_alloc(inode->i_mapping);
      |                      ^

Issue Links

• is related to: LU-18906 Fix build for gcc-11 / kernel 6.11
• is related to: LU-18448 Read Directory page on open.