Messages in this thread Patch in this message | | | Date | Thu, 10 Jan 2008 16:39:55 +0000 | From | "Jan Beulich" <> | Subject | [PATCH] adjust size calculation for get_vm_area() in ioremap() context |
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Short of getting a reply on the query why the argument of fls() here is missing the decrement, here's a patch to add it (reducing the resulting size when the incoming size is an exact power of two).
Signed-off-by: Jan Beulich <jbeulich@novell.com> Cc: James Bottomley <James.Bottomley@HansenPartnership.com> ---
mm/vmalloc.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
--- linux-2.6.24-rc7/mm/vmalloc.c 2008-01-10 16:50:54.000000000 +0100 +++ 2.6.24-rc7-vm-ioremap-size/mm/vmalloc.c 2008-01-08 12:35:11.000000000 +0100 @@ -176,7 +176,7 @@ static struct vm_struct *__get_vm_area_n BUG_ON(in_interrupt()); if (flags & VM_IOREMAP) { - int bit = fls(size); + int bit = fls(size - 1); if (bit > IOREMAP_MAX_ORDER) bit = IOREMAP_MAX_ORDER;
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