Messages in this thread | | | From | Andy Lutomirski <> | Date | Mon, 17 Dec 2012 17:10:21 -0800 | Subject | Are there u32 atomic bitops? (or dealing w/ i_flags) |
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I want to change inode->i_flags access to be atomic -- there are some locking oddities right now, I think, and I want to use a new inode flag to signal mtime updates from page_mkwrite. The problem is that i_flags is an unsigned int, and making it an unsigned long seems like a waste, but there aren't any u32 atomic bitops.
What should I do? Suck it up and waste four bytes on 64-bit machines?
In general, having atomic flag words be long seems likely to waste bits on 64-bit architectures.
--Andy
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