Changing CONFIG_LOG_BUF_SHIFT

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Hi,

I'm trying to change the value of CONFIG_LOG_BUF_SHIFT (in 2.6.6). I open .config in a text editor and change it from 15 to 20. Then I execute make. All the binaries are built as expected, but upon opening .config it's back to 15. I also tried changing the value in arch/i386/defconfig as well, but post-make they've reverted from 20 back to 15.

I guess I can just hard-code the value in printk.c itself, but I'm wondering how to get my value to stick.

Thanks,
Kirk

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