selftests/mm: skip khugepaged file tests if mkfs.xfs is unavailable

The XFS setup for ./khugepaged all:file checks that the kernel supports
XFS but not that mkfs.xfs is installed.  When CONFIG_XFS_FS=y and xfsprogs
is missing, mkfs.xfs and mount both fail, but
SPLIT_HUGE_PAGE_TEST_XFS_PATH is assigned from mktemp -d and stays set. 
The test then runs against plain tmpfs and six subtests fail.

The script already has a skip path for this test, but it never runs
because the path variable is always set.  Assign
SPLIT_HUGE_PAGE_TEST_XFS_PATH only once mkfs.xfs and mount have both
succeeded, and remove the image and directory otherwise.

Link: https://lore.kernel.org/20260912202903.16157-1-jaeyeon.lee.dev@gmail.com
Signed-off-by: Jaeyeon Lee <jaeyeon.lee.dev@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Suggested-by: Zi Yan <ziy@nvidia.com>
Reviewed-by: Zi Yan <ziy@nvidia.com>
Acked-by: David Hildenbrand (Arm) <david@kernel.org>
Reviewed-by: Lorenzo Stoakes (ARM) <ljs@kernel.org>
Assisted-by: LLM
Cc: Shuah Khan <shuah@kernel.org>
Cc: Liam R. Howlett <liam@infradead.org>
Cc: Vlastimil Babka <vbabka@kernel.org>
Cc: Mike Rapoport <rppt@kernel.org>
Cc: Suren Baghdasaryan <surenb@google.com>
Cc: Michal Hocko <mhocko@suse.com>

0 files changed, 0 insertions, 0 deletions