[LU-16351] Linux 6.1 client support

• Type: Improvement
• Resolution: Fixed
• Priority: Minor
• Fix Version/s: Lustre 2.16.0, Lustre 2.15.5
• Severity: 3
• Assignee: Shaun Tancheff
• Reporter: Shaun Tancheff

Description

Upstream changes affect Lustre client support:

Linux commit v4.10-rc3-6-gc440408cf690
random: convert get_random_int/long into get_random_u32/u64
Linux commit v6.0-11338-gde492c83cae0
prandom: remove unused functions

In effect prandom_u32 is a wrapper around get_random_u32, so change users of prandom_u32 to get_random_u32 and provide a fallback to prandom_u32 when get_random_u32 is not available.

Linux commit v6.0-rc1-2-g25885a35a720
Change calling conventions for filldir_t
Add a test for the new filldir_t signature and fix the current filldir_t usage

Linux commit v6.0-rc3-94-g35b471467f88
filemap: add filemap_get_folios_contig()
Provide a wrapper and fallback to find_get_pages_contig when filemap_get_folios_contig is not available.

Linux commit v6.0-rc3-225-gf39af05949a4
mm: add VMA iterator
Use vma_iterator and for_each_vma when available.