The patch titled sparc64: fix NR_PAGEFLAGS check has been added to the -mm tree. Its filename is pageflags-get-rid-of-flags_reserved-sparc64-fix.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 *** See http://www.zip.com.au/~akpm/linux/patches/stuff/added-to-mm.txt to find out what to do about this The current -mm tree may be found at http://userweb.kernel.org/~akpm/mmotm/ ------------------------------------------------------ Subject: sparc64: fix NR_PAGEFLAGS check From: Christoph Lameter <clameter@xxxxxxx> Update checks to make sure that we can place the cpu number in the upper portion of the page flags. Its okay if we use less than 32 page flags. There can only be a problem if the page flags grow beyond 32 bits to reach into the area reserved for the cpu number. Cc: David S. Miller <davem@xxxxxxxxxxxxx> Signed-off-by: Christoph Lameter <clameter@xxxxxxx> Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> --- arch/sparc64/mm/init.c | 17 ++++++++++++++--- 1 file changed, 14 insertions(+), 3 deletions(-) diff -puN arch/sparc64/mm/init.c~pageflags-get-rid-of-flags_reserved-sparc64-fix arch/sparc64/mm/init.c --- a/arch/sparc64/mm/init.c~pageflags-get-rid-of-flags_reserved-sparc64-fix +++ a/arch/sparc64/mm/init.c @@ -1300,10 +1300,21 @@ void __init paging_init(void) * functions like clear_dcache_dirty_cpu use the cpu mask * in 13-bit signed-immediate instruction fields. */ - BUILD_BUG_ON(BITS_PER_LONG - NR_PAGEFLAGS != 32); + + /* + * Page flags must not reach into upper 32 bits that are used + * for the cpu number + */ + BUILD_BUG_ON(NR_PAGEFLAGS > 32); + + /* + * The bit fields placed in the high range must not reach below + * the 32 bit boundary. Otherwise we cannot place the cpu field + * at the 32 bit boundary. + */ BUILD_BUG_ON(SECTIONS_WIDTH + NODES_WIDTH + ZONES_WIDTH + - ilog2(roundup_pow_of_two(NR_CPUS)) > - BITS_PER_LONG - NR_PAGEFLAGS); + ilog2(roundup_pow_of_two(NR_CPUS)) > 32); + BUILD_BUG_ON(NR_CPUS > 4096); kern_base = (prom_boot_mapping_phys_low >> 22UL) << 22UL; _ Patches currently in -mm which might be from clameter@xxxxxxx are git-x86.patch git-ia64.patch git-unionfs.patch git-pekka.patch remove-set_migrateflags.patch mm-use-zonelists-instead-of-zones-when-direct-reclaiming-pages.patch mm-introduce-node_zonelist-for-accessing-the-zonelist-for-a-gfp-mask.patch mm-remember-what-the-preferred-zone-is-for-zone_statistics.patch mm-use-two-zonelist-that-are-filtered-by-gfp-mask.patch mm-have-zonelist-contains-structs-with-both-a-zone-pointer-and-zone_idx.patch mm-have-zonelist-contains-structs-with-both-a-zone-pointer-and-zone_idx-fix-memcg-ooms.patch mm-have-zonelist-contains-structs-with-both-a-zone-pointer-and-zone_idx-just-return-do_try_to_free_pages.patch mm-have-zonelist-contains-structs-with-both-a-zone-pointer-and-zone_idx-just-return-do_try_to_free_pages-do_try_to_free_pages-gfp_mask-redundant.patch mm-filter-based-on-a-nodemask-as-well-as-a-gfp_mask.patch mm-filter-based-on-a-nodemask-as-well-as-a-gfp_mask-doc-fixes.patch mm-filter-based-on-a-nodemask-as-well-as-a-gfp_mask-make-dequeue_huge_page_vma-obey-mpol_bind-nodemask.patch mm-filter-based-on-a-nodemask-as-well-as-a-gfp_mask-make-dequeue_huge_page_vma-obey-mpol_bind-nodemask-rework.patch mm-filter-based-on-a-nodemask-as-well-as-a-gfp_mask-deporkify.patch mm-move-cache_line_size-to-linux-cacheh.patch mempolicy-convert-mpol-constants-to-enum.patch mempolicy-support-optional-mode-flags.patch mempolicy-support-optional-mode-flags-fix.patch mempolicy-add-mpol_f_static_nodes-flag.patch mempolicy-add-bitmap_onto-and-bitmap_fold-operations.patch mempolicy-add-mpol_f_relative_nodes-flag.patch mempolicy-update-numa-memory-policy-documentation.patch mempolicy-move-rebind-functions.patch mempolicy-create-mempolicy_operations-structure.patch mempolicy-create-mempolicy_operations-structure-fix.patch mempolicy-small-header-file-cleanup.patch mempolicy-disallow-static-or-relative-flags-for-local-preferred-mode.patch mempolicy-fix-parsing-of-tmpfs-mpol-mount-option.patch mm-make-mem_map-allocation-continuous-v2.patch mm-fix-alloc_bootmem_core-to-use-fast-searching-for-all-nodes.patch mm-offset-align-in-alloc_bootmem.patch mm-make-reserve_bootmem-can-crossed-the-nodes.patch mm-make-early_pfn_to_nid-a-c-function.patch vmalloc-show-vmalloced-areas-via-proc-vmallocinfo.patch vmalloc-show-vmalloced-areas-via-proc-vmallocinfo-checkpatch-fixes.patch vmalloc-show-vmalloced-areas-via-proc-vmallocinfo-fix.patch vmalloc-show-vmalloced-areas-via-proc-vmallocinfo-fix-2.patch vmallocinfo-add-caller-information.patch vmallocinfo-add-caller-information-checkpatch-fixes.patch sparsemem-vmemmap-does-not-need-section-bits.patch kbuild-create-a-way-to-create-preprocessor-constants-from-c-expressions.patch page_mapping-add-ifdef-around-reference-to-swapper_space.patch pageflags-use-an-enum-for-the-flags.patch pageflags-get-rid-of-flags_reserved.patch pageflags-get-rid-of-flags_reserved-sparc64-fix.patch pageflags-introduce-macros-to-generate-page-flag-functions.patch pageflags-convert-to-the-use-of-new-macros.patch pageflags-use-proper-page-flag-functions-in-xen.patch pageflags-eliminate-pg_xxx-aliases.patch page-flags-handle-pg_uncached-like-all-other-flags.patch page-flags-add-pageflags_false-for-flags-that-are-always-false.patch mm-get-rid-of-__zone_count.patch pageflags_extended-and-separate-page-flags-for-head-and-tail.patch pageflags-standardize-comment-inclusion-in-asm-offsetsh-and-fix-mips.patch mm-remove-unused-max_nodes_shift.patch vmcoreinfo-add-page-flags-values.patch mempolicy-rename-mpol_free-to-mpol_put.patch mempolicy-rename-mpol_copy-to-mpol_dup.patch mempolicy-write-lock-mmap_sem-while-changing-task-mempolicy.patch mempolicy-fixup-fallback-for-default-shmem-policy.patch mempolicy-rename-struct-mempolicy-policy-member-to-mode.patch mempolicy-mark-shared-policies-for-unref.patch mempolicy-document-setget_policy-vm_ops-apis.patch mempolicy-rework-mempolicy-reference-counting.patch mempolicy-use-mpol_preferred-for-system-wide-default-policy.patch mempolicy-mpol_preferred-cleanups-for-local-allocation.patch mempolicy-use-mpol_f_local-to-indicate-preferred-local-policy.patch mempolicy-clean-up-mpol-to-str-mempolicy-formatting.patch mempolicy-rework-shmem-mpol-parsing-and-display.patch mempolicy-support-mpol=local-tmpfs-mount-option.patch mempolicy-use-struct-mempolicy-pointer-in-shmem_sb_info.patch mempolicy-use-struct-mempolicy-pointer-in-shmem_sb_info-fix.patch mempolicy-use-struct-mempolicy-pointer-in-shmem_sb_info-fix-fix.patch mempolicy-use-struct-mempolicy-pointer-in-shmem_sb_info-fix-fix-fix.patch ipc-add-definitions-of-ushort_max-and-others.patch mm-add-nr_writeback_temp-counter.patch remove-div_long_long_rem.patch slab-add-a-flag-to-prevent-debug_free-checks-on-a-kmem_cache.patch reiser4.patch reiser4-portion-of-zero_user-cleanup-patch.patch page-owner-tracking-leak-detector.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