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Date: Mon, 26 Jan 2015 16:13:23 -0700 From: Toshi Kani <toshi.kani@...com> To: akpm@...ux-foundation.org, hpa@...or.com, tglx@...utronix.de, mingo@...hat.com, arnd@...db.de, linux-mm@...ck.org Cc: x86@...nel.org, linux-kernel@...r.kernel.org, Toshi Kani <toshi.kani@...com> Subject: [RFC PATCH 1/7] mm: Change __get_vm_area_node() to use fls_long() __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@...com> --- 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 from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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