On 05.08.24 14:55, Qi Zheng wrote:
Make pte_offset_map_nolock() return pmdval so that we can recheck the *pmd once the lock is taken. This is a preparation for freeing empty PTE pages, no functional changes are expected.
Skimming the patches, only patch #4 updates one of the callsites (collapse_pte_mapped_thp).
Wouldn't we have to recheck if the PMD val changed in more cases after taking the PTL?
If not, would it make sense to have a separate function that returns the pmdval and we won't have to update each and every callsite?
-- Cheers, David / dhildenb
