__get_vm_area_node() takes unsigned long size, which is a 64-bit value on a 64-bit kernel. However, fls(size) simply ignores the upper 32-bit. Change to use fls_long() to handle the size properly. Signed-off-by: Toshi Kani <toshi.kani@xxxxxx> --- mm/vmalloc.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/mm/vmalloc.c b/mm/vmalloc.c index 39c3388..830a4be 100644 --- a/mm/vmalloc.c +++ b/mm/vmalloc.c @@ -29,6 +29,7 @@ #include <linux/atomic.h> #include <linux/compiler.h> #include <linux/llist.h> +#include <linux/bitops.h> #include <asm/uaccess.h> #include <asm/tlbflush.h> @@ -1314,7 +1315,8 @@ static struct vm_struct *__get_vm_area_node(unsigned long size, BUG_ON(in_interrupt()); if (flags & VM_IOREMAP) - align = 1ul << clamp(fls(size), PAGE_SHIFT, IOREMAP_MAX_ORDER); + align = 1ul << clamp((int)fls_long(size), + PAGE_SHIFT, IOREMAP_MAX_ORDER); size = PAGE_ALIGN(size); if (unlikely(!size)) -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>