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    SubjectRe: [PATCH 1/2] RCU: Don't include unnecessary headers, allow kmemtrace w/ tracepoints.
    On Tue, Dec 30, 2008 at 08:53:37AM +0100, Ingo Molnar wrote:
    > hm, there are quite a few such dependencies it appears, for example:
    >
    > In file included from init/do_mounts_initrd.c:4:
    > include/linux/fs.h: In function 'alloc_secdata':
    > include/linux/fs.h:2214: error: implicit declaration of function 'get_zeroed_page'
    > include/linux/fs.h:2214: error: 'GFP_KERNEL' undeclared (first use in this function)
    > include/linux/fs.h:2214: error: (Each undeclared identifier is reported only once
    > include/linux/fs.h:2214: error: for each function it appears in.)
    > include/linux/fs.h: In function 'free_secdata':
    > include/linux/fs.h:2219: error: implicit declaration of function
    > 'free_page'
    > In file included from include/linux/slab.h:13,
    > from include/linux/percpu.h:6,
    > from include/linux/percpu_counter.h:14,
    > from include/linux/ext2_fs_sb.h:21,
    > from include/linux/ext2_fs.h:70,
    > from init/do_mounts_initrd.c:6:
    >
    > config attached.
    >
    > Ingo

    Hm, that's weird, I was also testing on a 2.6.28-based tree. And I don't
    see any reference to RCU headers in this error message. My guess is some
    code assumes a certain header provides some definitions it isn't
    required to.

    I'll checkout your tree and have a look.


    Eduard



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