Re: [tip:x86/asm] bitops: Optimise get_order()

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David, could you make a fix for this?


On 02/29/2012 04:31 PM, Stephen Rothwell wrote:
On Wed, 29 Feb 2012 15:29:04 -0500 Paul Gortmaker<paul.gortmaker@xxxxxxxxxxxxx>  wrote:

On Mon, Feb 20, 2012 at 6:20 PM, tip-bot for David Howells
<dhowells@xxxxxxxxxx>  wrote:
Commit-ID:  d66acc39c7cee323733c8503b9de1821a56dff7e
Author:     David Howells<dhowells@xxxxxxxxxx>
AuthorDate: Mon, 20 Feb 2012 22:39:29 +0000
Committer:  H. Peter Anvin<hpa@xxxxxxxxx>
CommitDate: Mon, 20 Feb 2012 14:47:02 -0800

bitops: Optimise get_order()

This is causing build failures on non-x86 in linux next according to git bisect.

Presumably it needs to include linux/bitops.h (and see below).

+static inline __attribute_const__
+int __get_order(unsigned long size)
+       int order;
+       size--;
+       size>>= PAGE_SHIFT;
+#if BITS_PER_LONG == 32
+       order = fls(size);
+       order = fls64(size);

linux/bitops.h has fls_long() that does this size test and calls the right thing.

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