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SubjectRe: Linux 2.4.0-ac9
On Saturday 13 January 2001 20:05, Karsten Hopp wrote:
> You need to enable CONFIG_SWAPFS.
> Those functions are enclosed by #ifdef CONFIG_SWAPFS and #endif, but
> the references to them aren't.
>
> Karsten
>
> On Sat, Jan 13, 2001 at 06:40:40PM -0700, Steven Cole wrote:
> > I got the following error while building 2.4.0-ac9:
> >
> > shmem.c:971: `shmem_readlink' undeclared here (not in a function)
> > shmem.c:971: initializer element is not constant
> > shmem.c:971: (near initialization for
> > `shmem_symlink_inode_operations.readlink')
> > shmem.c:972: `shmem_follow_link' undeclared here (not in a function)
> > shmem.c:972: initializer element is not constant
> > shmem.c:972: (near initialization for
> > `shmem_symlink_inode_operations.follow_link')
> > shmem.c:973: initializer element is not constant
> > shmem.c:973: (near initialization for `shmem_symlink_inode_operations')
> > shmem.c:973: initializer element is not constant
> > shmem.c:973: (near initialization for `shmem_symlink_inode_operations')
> > make[2]: *** [shmem.o] Error 1
> >

Yes, enabling CONFIG_SWAPFS works just fine:

[scole@localhost scole]$ uname -a
Linux localhost.localdomain 2.4.0-ac9 #2 Sat Jan 13 20:23:00 MST 2001 i686
unknown

Here is a little patch which also fixes the symptoms of the build problem, and
makes a kernel 1510 bytes smaller (without CONFIG_SWAPFS). Someone more
knowlegable than I will have to verify its correctness.

This patch is against 2.4.0-ac9.

--- linux/mm/shmem.c.orig Sat Jan 13 20:23:36 2001
+++ linux/mm/shmem.c Sat Jan 13 20:27:32 2001
@@ -968,8 +968,10 @@

static struct inode_operations shmem_symlink_inode_operations = {
truncate: shmem_truncate,
+#ifdef CONFIG_SWAPFS
readlink: shmem_readlink,
follow_link: shmem_follow_link,
+#endif
};

static struct file_operations shmem_dir_operations = {
-
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