mm/debug_vm_pgtable: use struct pgtable_debug_args in PTE modifying tests

This uses struct pgtable_debug_args in PTE modifying tests.  The allocated
page is used as set_pte_at() is used there.  The tests are skipped if the
allocated page doesn't exist.  It's notable that args->ptep need to be
mapped before the tests.  The reason why we don't map args->ptep at the
beginning is PTE entry is only mapped and accessible in atomic context
when CONFIG_HIGHPTE is enabled.  So we avoid to do that so that atomic
context is only enabled if needed.

Besides, the unused variable @pte_aligned and @ptep in debug_vm_pgtable()
are dropped.

Link: https://lkml.kernel.org/r/[email protected]
Signed-off-by: Gavin Shan <[email protected]>
Reviewed-by: Anshuman Khandual <[email protected]>
Tested-by: Christophe Leroy <[email protected]>	[powerpc 8xx]
Tested-by: Gerald Schaefer <[email protected]>	[s390]
Cc: Aneesh Kumar K.V <[email protected]>
Cc: Catalin Marinas <[email protected]>
Cc: Chunyu Hu <[email protected]>
Cc: Qian Cai <[email protected]>
Cc: Vineet Gupta <[email protected]>
Cc: Will Deacon <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>

0 files changed, 0 insertions, 0 deletions