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| author | Nick Piggin <npiggin@suse.de> | 2007-10-16 01:25:07 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2007-10-16 09:42:55 -0700 |
| commit | 89e107877b65bf6eff1d63a1302dee9a091586f5 (patch) | |
| tree | 8a120a04c46f19229d1cf9b9c546f1818cf84c44 /mm/filemap.c | |
| parent | 7765ec26ae1c01bb29bedf910e4efcced8cc81d2 (diff) | |
| download | lwn-89e107877b65bf6eff1d63a1302dee9a091586f5.tar.gz lwn-89e107877b65bf6eff1d63a1302dee9a091586f5.zip | |
fs: new cont helpers
Rework the generic block "cont" routines to handle the new aops. Supporting
cont_prepare_write would take quite a lot of code to support, so remove it
instead (and we later convert all filesystems to use it).
write_begin gets passed AOP_FLAG_CONT_EXPAND when called from
generic_cont_expand, so filesystems can avoid the old hacks they used.
Signed-off-by: Nick Piggin <npiggin@suse.de>
Cc: OGAWA Hirofumi <hirofumi@mail.parknet.co.jp>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm/filemap.c')
| -rw-r--r-- | mm/filemap.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/mm/filemap.c b/mm/filemap.c index ca04226bf1de..195339b27e9a 100644 --- a/mm/filemap.c +++ b/mm/filemap.c @@ -1684,6 +1684,7 @@ size_t iov_iter_copy_from_user_atomic(struct page *page, return copied; } +EXPORT_SYMBOL(iov_iter_copy_from_user_atomic); /* * This has the same sideeffects and return value as @@ -1710,6 +1711,7 @@ size_t iov_iter_copy_from_user(struct page *page, kunmap(page); return copied; } +EXPORT_SYMBOL(iov_iter_copy_from_user); static void __iov_iter_advance_iov(struct iov_iter *i, size_t bytes) { @@ -1741,6 +1743,7 @@ void iov_iter_advance(struct iov_iter *i, size_t bytes) __iov_iter_advance_iov(i, bytes); i->count -= bytes; } +EXPORT_SYMBOL(iov_iter_advance); /* * Fault in the first iovec of the given iov_iter, to a maximum length @@ -1757,6 +1760,7 @@ int iov_iter_fault_in_readable(struct iov_iter *i, size_t bytes) bytes = min(bytes, i->iov->iov_len - i->iov_offset); return fault_in_pages_readable(buf, bytes); } +EXPORT_SYMBOL(iov_iter_fault_in_readable); /* * Return the count of just the current iov_iter segment. @@ -1769,6 +1773,7 @@ size_t iov_iter_single_seg_count(struct iov_iter *i) else return min(i->count, iov->iov_len - i->iov_offset); } +EXPORT_SYMBOL(iov_iter_single_seg_count); /* * Performs necessary checks before doing a write |