The patch titled
Subject: mm/filemap.c: provide dummy filemap_page_mkwrite() for NOMMU
has been added to the -mm tree. Its filename is
mm-filemap-provide-dummy-filemap_page_mkwrite-for-nommu.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/mm-filemap-provide-dummy-filemap_page_mkwrite-for-nommu.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/mm-filemap-provide-dummy-filemap_page_mkwrite-for-nommu.patch
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------------------------------------------------------
From: Arnd Bergmann <arnd@xxxxxxxx>
Subject: mm/filemap.c: provide dummy filemap_page_mkwrite() for NOMMU
Building orangefs on MMU-less machines now results in a link error because
of the newly introduced use of the filemap_page_mkwrite() function:
ERROR: "filemap_page_mkwrite" [fs/orangefs/orangefs.ko] undefined!
This adds a dummy version for it, similar to the existing
generic_file_mmap and generic_file_readonly_mmap stubs in the same file,
to avoid the link error without adding #ifdefs in each file system that
uses these.
Link: http://lkml.kernel.org/r/20180409105555.2439976-1-arnd@xxxxxxxx
Fixes: a5135eeab2e5 ("orangefs: implement vm_ops->fault")
Signed-off-by: Arnd Bergmann <arnd@xxxxxxxx>
Reviewed-by: Jan Kara <jack@xxxxxxx>
Reviewed-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
Cc: Martin Brandenburg <martin@xxxxxxxxxxxx>
Cc: Mike Marshall <hubcap@xxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
diff -puN mm/filemap.c~mm-filemap-provide-dummy-filemap_page_mkwrite-for-nommu mm/filemap.c
--- a/mm/filemap.c~mm-filemap-provide-dummy-filemap_page_mkwrite-for-nommu
+++ a/mm/filemap.c
@@ -2721,7 +2721,6 @@ out:
sb_end_pagefault(inode->i_sb);
return ret;
}
-EXPORT_SYMBOL(filemap_page_mkwrite);
const struct vm_operations_struct generic_file_vm_ops = {
.fault = filemap_fault,
@@ -2752,6 +2751,10 @@ int generic_file_readonly_mmap(struct fi
return generic_file_mmap(file, vma);
}
#else
+int filemap_page_mkwrite(struct vm_fault *vmf)
+{
+ return -ENOSYS;
+}
int generic_file_mmap(struct file * file, struct vm_area_struct * vma)
{
return -ENOSYS;
@@ -2762,6 +2765,7 @@ int generic_file_readonly_mmap(struct fi
}
#endif /* CONFIG_MMU */
+EXPORT_SYMBOL(filemap_page_mkwrite);
EXPORT_SYMBOL(generic_file_mmap);
EXPORT_SYMBOL(generic_file_readonly_mmap);
_
Patches currently in -mm which might be from arnd@xxxxxxxx are
mm-filemap-provide-dummy-filemap_page_mkwrite-for-nommu.patch
mm-hmm-fix-header-file-if-else-endif-maze-again.patch
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