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charset=UTF-8 On Wed Jun 26, 2024 at 12:30 AM EDT, ran xiaokai wrote: > > On Tue Jun 25, 2024 at 10:49 PM EDT, ran xiaokai wrote: > > > From: Ran Xiaokai > > > > > > Constify folio_order()/folio_test_pmd_mappable(). > > > No functional changes, just a preparation for the next patch. > >=20 > > What warning/error are you seeing when you just apply patch 2? I wonder= why it > > did not show up in other places. Thanks. > > fs/proc/page.c: In function 'stable_page_flags': > fs/proc/page.c:152:35: warning: passing argument 1 of 'folio_test_pmd_map= pable' discards 'const' qualifier from pointer target type [-Wdiscarded-qua= lifiers] > 152 | else if (folio_test_pmd_mappable(folio)) { > | ^~~~~ > In file included from include/linux/mm.h:1115, > from include/linux/memblock.h:12, > from fs/proc/page.c:2: > include/linux/huge_mm.h:380:58: note: expected 'struct folio *' but argum= ent is of type 'const struct folio *' > 380 | static inline bool folio_test_pmd_mappable(struct folio *folio) > > u64 stable_page_flags(const struct page *page) > { > const struct folio *folio; // the const definition causes the warning > ... Please include the warning in the commit log to explain the change. > } > > As almost all the folio_test_XXX(flags) have converted to received > a const parameter, it is Ok to also do this for folio_order()? 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