Messages in this thread | | | From | Denis Vlasenko <> | Subject | Re: CONFIG_PRINTK doesn't makes size smaller | Date | Tue, 20 Sep 2005 11:30:10 +0300 |
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On Tuesday 20 September 2005 09:14, colin wrote: > > Hi there, > I tried to make kernel with CONFIG_PRINTK off. I considered it should become > smaller, but it didn't because it actually isn't an empty function, and > there are many copies of it in vmlinux, not just one. Here is its > definition: > static inline int printk(const char *s, ...) { return 0; } > > I change the definition to this and it can greatly reduce the size by about > 5%: > #define printk(...) do {} while (0) > However, this definition would lead to error in some situations. For > example: > 1. (printk) > 2. ret = printk > > I hope someone could suggest a better definition of printk that can both > make printk smaller and eliminate errors.
I think isolated testcase (a preprocessed .c file) would be interesting. Use make dir/dir/file.i, reduce result to small .c file which shows the problem, and show it on lkml. -- vda - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.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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