Re: [PATCH 3/5] mm/parisc: constify ptep_get() argument

[Usama Arif <usama.arif@linux.dev>]

On 24/07/2026 15:14, Matthew Wilcox wrote:
> On Fri, Jul 24, 2026 at 02:36:59PM +0100, Usama Arif wrote:
>>
>>
>> On 24/07/2026 11:20, Pedro Falcato wrote:
>>> ptep_get() does not need write access to the PTE.
>>>
>>> Signed-off-by: Pedro Falcato <pfalcato@suse.de>
>>> ---
>>>  arch/parisc/include/asm/pgtable.h | 2 +-
>>>  1 file changed, 1 insertion(+), 1 deletion(-)
>>>
>> hmm I think you might break build bisectibility if
>> you separate out the patches, you should squash patch 3 and 4,
>> with patch 1.
> 
> I don't see how this breaks bisectability.  Can you elaborate on what
> you think would break?

Patch 1 does:

-static inline pte_t ptep_get_lockless(pte_t *ptep)
+static inline pte_t ptep_get_lockless(const pte_t *ptep)
 {
 	return ptep_get(ptep);
 }


ptep_get() takes a non-const arg till patch 3 for example for parsic.
I don't think you can pass a const variable to non const function arg?

So parsic won't compile in patch 1 and 2, powerprc wont compile
for patches 1, 2 and 3..