The patch titled Subject: mm: uninline page_mapped() has been added to the -mm tree. Its filename is mm-uninline-page_mapped.patch This patch should soon appear at http://ozlabs.org/~akpm/mmots/broken-out/mm-uninline-page_mapped.patch and later at http://ozlabs.org/~akpm/mmotm/broken-out/mm-uninline-page_mapped.patch Before you just go and hit "reply", please: a) Consider who else should be cc'ed b) Prefer to cc a suitable mailing list as well c) Ideally: find the original patch on the mailing list and do a reply-to-all to that, adding suitable additional cc's *** Remember to use Documentation/SubmitChecklist when testing your code *** The -mm tree is included into linux-next and is updated there every 3-4 working days ------------------------------------------------------ From: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> Subject: mm: uninline page_mapped() It's huge. Uninlining it saves 206 bytes per callsite. Shaves 4924 bytes from the x86_64 allmodconfig vmlinux. Cc: Steve Capper <steve.capper@xxxxxxx> Cc: Kirill A. Shutemov <kirill.shutemov@xxxxxxxxxxxxxxx> Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> --- include/linux/mm.h | 21 +-------------------- mm/util.c | 22 ++++++++++++++++++++++ 2 files changed, 23 insertions(+), 20 deletions(-) diff -puN include/linux/mm.h~mm-uninline-page_mapped include/linux/mm.h --- a/include/linux/mm.h~mm-uninline-page_mapped +++ a/include/linux/mm.h @@ -1019,26 +1019,7 @@ static inline pgoff_t page_file_index(st return page->index; } -/* - * Return true if this page is mapped into pagetables. - * For compound page it returns true if any subpage of compound page is mapped. - */ -static inline bool page_mapped(struct page *page) -{ - int i; - if (likely(!PageCompound(page))) - return atomic_read(&page->_mapcount) >= 0; - page = compound_head(page); - if (atomic_read(compound_mapcount_ptr(page)) >= 0) - return true; - if (PageHuge(page)) - return false; - for (i = 0; i < hpage_nr_pages(page); i++) { - if (atomic_read(&page[i]._mapcount) >= 0) - return true; - } - return false; -} +bool page_mapped(struct page *page); /* * Return true only if the page has been allocated with diff -puN mm/util.c~mm-uninline-page_mapped mm/util.c --- a/mm/util.c~mm-uninline-page_mapped +++ a/mm/util.c @@ -346,6 +346,28 @@ void *page_rmapping(struct page *page) return __page_rmapping(page); } +/* + * Return true if this page is mapped into pagetables. + * For compound page it returns true if any subpage of compound page is mapped. + */ +bool page_mapped(struct page *page) +{ + int i; + if (likely(!PageCompound(page))) + return atomic_read(&page->_mapcount) >= 0; + page = compound_head(page); + if (atomic_read(compound_mapcount_ptr(page)) >= 0) + return true; + if (PageHuge(page)) + return false; + for (i = 0; i < hpage_nr_pages(page); i++) { + if (atomic_read(&page[i]._mapcount) >= 0) + return true; + } + return false; +} +EXPORT_SYMBOL(page_mapped); + struct anon_vma *page_anon_vma(struct page *page) { unsigned long mapping; _ Patches currently in -mm which might be from akpm@xxxxxxxxxxxxxxxxxxxx are i-need-old-gcc.patch arch-alpha-kernel-systblss-remove-debug-check.patch drivers-gpu-drm-i915-intel_spritec-fix-build.patch drivers-gpu-drm-i915-intel_tvc-fix-build.patch mm-rename-_count-field-of-the-struct-page-to-_refcount-fix.patch mm-rename-_count-field-of-the-struct-page-to-_refcount-fix-fix.patch ksm-introduce-ksm_max_page_sharing-per-page-deduplication-limit-fix-2.patch arm-arch-arm-include-asm-pageh-needs-personalityh.patch mm.patch include-linux-apply-__malloc-attribute-checkpatch-fixes.patch include-linux-nodemaskh-create-next_node_in-helper.patch include-linux-nodemaskh-create-next_node_in-helper-fix-fix.patch mm-hugetlbc-use-first_memory_node.patch mm-mempolicyc-offset_il_node-document-and-clarify.patch mm-compaction-direct-freepage-allocation-for-async-direct-compaction-checkpatch-fixes.patch mm-uninline-page_mapped.patch mm-oom-rework-oom-detection-checkpatch-fixes.patch mm-use-watermak-checks-for-__gfp_repeat-high-order-allocations-checkpatch-fixes.patch exit_thread-remove-empty-bodies-fix.patch exit_thread-accept-a-task-parameter-to-be-exited-checkpatch-fixes.patch drivers-net-wireless-intel-iwlwifi-dvm-calibc-fix-min-warning.patch do_shared_fault-check-that-mmap_sem-is-held.patch kernel-forkc-export-kernel_thread-to-modules.patch slab-leaks3-default-y.patch -- To unsubscribe from this list: send the line "unsubscribe mm-commits" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html