Thread (4 messages) 4 messages, 2 authors, 2011-03-31

Re: [PATCH] wl12xx: use a bitmask instead of list of booleans in scanned_ch

From: Luciano Coelho <hidden>
Date: 2011-03-22 07:46:34

On Tue, 2011-03-22 at 09:40 +0200, Eliad Peller wrote:
On Mon, Mar 21, 2011 at 11:19 PM, Luciano Coelho [off-list ref] wrote:
quoted
We were using an array of booleans to mark the channels we had already scanned.  This was causing a sparse error, because bool is not a type with defined size.  To fix this, use bitmasks instead, which is much cleaner anyway.

Thanks Johannes Berg for the idea.

Signed-off-by: Luciano Coelho <redacted>
---
[...]
quoted
+       /* make sure all our channels fit in the scanned_ch bitmask */
+       BUG_ON(ARRAY_SIZE(wl1271_channels) + ARRAY_SIZE(wl1271_channels_5ghz) >
+              WL1271_MAX_CHANNELS);
maybe use BUILD_BUG_ON here?
Yeah, I had actually done that at first.  But then the compilation error
was so cryptic that I decided to add a BUG_ON instead.  But now I
realize that the BUG_ON is just as cryptic, so I can change it back to
BUILD_BUG_ON.  In either case, the developer will know soon enough that
there is a bug. :)

I'll change it to BUILD_BUG_ON before applying.

Thanks!

-- 
Cheers,
Luca.
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