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When installing modules, I'm frequently asked for headers, kernel headers that is.
Often, their names have to be as specific as hell.
But what happens if you've recompiled, or (even easier) renamed your kernel so that what uname -r says is no longer right?
Are headers so specific to a certain (distro) kernel? Can they be generated with the appropriate source and config file? What are they in any case? some sort of executive summary of the kernel? They have me a quandry, that's for sure.
Headers are a bunch of files (ending in .h, for header) that essentially describe the programming functions available to userspace programs. (OK, I lied a bit, they also describe things internal to the kernel, but that's only needed for kernel compilation).
Basically, the headers say: "I have this function available, and this function, and this value" and so forth.
Now, on to your question:
If you have kernel source (or headers) for the proper revision installed, the exact name should not be terribly important.
If your current kernel is 2.6.11, have some 2.6.11 headers installed. Just make sure the symlink /lib/modules/`uname -r`/build points to the installed headers, and you should be good to go.