The patch titled Subject: mm: slub: introduce virt_to_obj function has been added to the -mm tree. Its filename is mm-slub-introduce-virt_to_obj-function.patch This patch should soon appear at http://ozlabs.org/~akpm/mmots/broken-out/mm-slub-introduce-virt_to_obj-function.patch and later at http://ozlabs.org/~akpm/mmotm/broken-out/mm-slub-introduce-virt_to_obj-function.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: Andrey Ryabinin <a.ryabinin@xxxxxxxxxxx> Subject: mm: slub: introduce virt_to_obj function virt_to_obj takes kmem_cache address, address of slab page, address x pointing somewhere inside slab object, and returns address of the beginning of object. Signed-off-by: Andrey Ryabinin <a.ryabinin@xxxxxxxxxxx> Acked-by: Christoph Lameter <cl@xxxxxxxxx> Cc: Dmitry Vyukov <dvyukov@xxxxxxxxxx> Cc: Konstantin Serebryany <kcc@xxxxxxxxxx> Cc: Dmitry Chernenkov <dmitryc@xxxxxxxxxx> Cc: Andrey Konovalov <adech.fo@xxxxxxxxx> Cc: Yuri Gribov <tetra2005@xxxxxxxxx> Cc: Konstantin Khlebnikov <koct9i@xxxxxxxxx> Cc: Sasha Levin <sasha.levin@xxxxxxxxxx> Cc: Christoph Lameter <cl@xxxxxxxxx> Cc: Joonsoo Kim <iamjoonsoo.kim@xxxxxxx> Cc: Dave Hansen <dave.hansen@xxxxxxxxx> Cc: Andi Kleen <andi@xxxxxxxxxxxxxx> Cc: Ingo Molnar <mingo@xxxxxxx> Cc: Thomas Gleixner <tglx@xxxxxxxxxxxxx> Cc: "H. Peter Anvin" <hpa@xxxxxxxxx> Cc: Pekka Enberg <penberg@xxxxxxxxxx> Cc: David Rientjes <rientjes@xxxxxxxxxx> Cc: Joonsoo Kim <iamjoonsoo.kim@xxxxxxx> Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> --- include/linux/slub_def.h | 16 ++++++++++++++++ 1 file changed, 16 insertions(+) diff -puN include/linux/slub_def.h~mm-slub-introduce-virt_to_obj-function include/linux/slub_def.h --- a/include/linux/slub_def.h~mm-slub-introduce-virt_to_obj-function +++ a/include/linux/slub_def.h @@ -110,4 +110,20 @@ static inline void sysfs_slab_remove(str } #endif + +/** + * virt_to_obj - returns address of the beginning of object. + * @s: object's kmem_cache + * @slab_page: address of slab page + * @x: address within object memory range + * + * Returns address of the beginning of object + */ +static inline void *virt_to_obj(struct kmem_cache *s, + const void *slab_page, + const void *x) +{ + return (void *)x - ((x - slab_page) % s->size); +} + #endif /* _LINUX_SLUB_DEF_H */ _ Patches currently in -mm which might be from a.ryabinin@xxxxxxxxxxx are compiler-introduce-__aliassymbol-shortcut.patch add-kernel-address-sanitizer-infrastructure.patch kasan-disable-memory-hotplug.patch x86_64-add-kasan-support.patch mm-page_alloc-add-kasan-hooks-on-alloc-and-free-paths.patch mm-slub-introduce-virt_to_obj-function.patch mm-slub-share-object_err-function.patch mm-slub-introduce-metadata_access_enable-metadata_access_disable.patch mm-slub-add-kernel-address-sanitizer-support-for-slub-allocator.patch fs-dcache-manually-unpoison-dname-after-allocation-to-shut-up-kasans-reports.patch kmemleak-disable-kasan-instrumentation-for-kmemleak.patch lib-add-kasan-test-module.patch x86_64-kasan-add-interceptors-for-memset-memmove-memcpy-functions.patch kasan-enable-stack-instrumentation.patch mm-vmalloc-add-flag-preventing-guard-hole-allocation.patch mm-vmalloc-pass-additional-vm_flags-to-__vmalloc_node_range.patch kernel-add-support-for-init_array-constructors.patch module-fix-types-of-device-tables-aliases.patch kasan-enable-instrumentation-of-global-variables.patch hugetlb-sysctl-pass-extra1-=-null-rather-then-extra1-=-zero.patch mm-hugetlb-fix-type-of-hugetlb_treat_as_movable-variable.patch proc-pagemap-walk-page-tables-under-pte-lock.patch linux-next.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