The patch titled Subject: memblock, memhotplug: Fix wrong type in memblock_find_in_range_node(). has been added to the -mm tree. Its filename is memblock-memhotplug-fix-wrong-type-in-memblock_find_in_range_node.patch This patch should soon appear at http://ozlabs.org/~akpm/mmots/broken-out/memblock-memhotplug-fix-wrong-type-in-memblock_find_in_range_node.patch and later at http://ozlabs.org/~akpm/mmotm/broken-out/memblock-memhotplug-fix-wrong-type-in-memblock_find_in_range_node.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: Tang Chen <tangchen@xxxxxxxxxxxxxx> Subject: memblock, memhotplug: Fix wrong type in memblock_find_in_range_node(). In memblock_find_in_range_node(), we defined ret as int. But it should be phys_addr_t because it is used to store the return value from __memblock_find_range_bottom_up(). The bug has not been triggered because when allocating low memory near the kernel end, the "int ret" won't turn out to be negative. When we started to allocate memory on other nodes, and the "int ret" could be minus. Then the kernel will panic. A simple way to reproduce this: comment out the following code in numa_init(), memblock_set_bottom_up(false); and the kernel won't boot. Reported-by: Xishi Qiu <qiuxishi@xxxxxxxxxx> Signed-off-by: Tang Chen <tangchen@xxxxxxxxxxxxxx> Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> --- mm/memblock.c | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-) diff -puN mm/memblock.c~memblock-memhotplug-fix-wrong-type-in-memblock_find_in_range_node mm/memblock.c --- a/mm/memblock.c~memblock-memhotplug-fix-wrong-type-in-memblock_find_in_range_node +++ a/mm/memblock.c @@ -192,8 +192,7 @@ phys_addr_t __init_memblock memblock_fin phys_addr_t align, phys_addr_t start, phys_addr_t end, int nid) { - int ret; - phys_addr_t kernel_end; + phys_addr_t kernel_end, ret; /* pump up @end */ if (end == MEMBLOCK_ALLOC_ACCESSIBLE) _ Patches currently in -mm which might be from tangchen@xxxxxxxxxxxxxx are origin.patch memblock-memhotplug-fix-wrong-type-in-memblock_find_in_range_node.patch x86mem-hotplug-pass-sync_global_pgds-a-correct-argument-in-remove_pagetable.patch x86mem-hotplug-modify-pgd-entry-when-removing-memory.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