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| author | Nate Diller <nate.diller@gmail.com> | 2007-05-12 19:36:54 +0200 |
|---|---|---|
| committer | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2007-05-12 19:55:39 +0200 |
| commit | e3bf460f3eb86cdbc76725a0dac1f191e796676c (patch) | |
| tree | 7f11e16b4196735f62d4e3848f9084000b5e6b55 /fs/ntfs/file.c | |
| parent | fault injection: disable stacktrace filter for x86-64 (diff) | |
| download | linux-e3bf460f3eb86cdbc76725a0dac1f191e796676c.tar.xz linux-e3bf460f3eb86cdbc76725a0dac1f191e796676c.zip | |
ntfs: use zero_user_page
Use zero_user_page() instead of open-coding it.
[akpm@linux-foundation.org: kmap-type fixes]
Signed-off-by: Nate Diller <nate.diller@gmail.com>
Acked-by: Anton Altaparmakov <aia21@cantab.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'fs/ntfs/file.c')
| -rw-r--r-- | fs/ntfs/file.c | 59 |
1 files changed, 17 insertions, 42 deletions
diff --git a/fs/ntfs/file.c b/fs/ntfs/file.c index 621de369e6f8..39a1669506bd 100644 --- a/fs/ntfs/file.c +++ b/fs/ntfs/file.c @@ -606,11 +606,8 @@ do_next_page: ntfs_submit_bh_for_read(bh); *wait_bh++ = bh; } else { - u8 *kaddr = kmap_atomic(page, KM_USER0); - memset(kaddr + bh_offset(bh), 0, - blocksize); - kunmap_atomic(kaddr, KM_USER0); - flush_dcache_page(page); + zero_user_page(page, bh_offset(bh), + blocksize, KM_USER0); set_buffer_uptodate(bh); } } @@ -685,12 +682,9 @@ map_buffer_cached: ntfs_submit_bh_for_read(bh); *wait_bh++ = bh; } else { - u8 *kaddr = kmap_atomic(page, - KM_USER0); - memset(kaddr + bh_offset(bh), - 0, blocksize); - kunmap_atomic(kaddr, KM_USER0); - flush_dcache_page(page); + zero_user_page(page, + bh_offset(bh), + blocksize, KM_USER0); set_buffer_uptodate(bh); } } @@ -708,11 +702,8 @@ map_buffer_cached: */ if (bh_end <= pos || bh_pos >= end) { if (!buffer_uptodate(bh)) { - u8 *kaddr = kmap_atomic(page, KM_USER0); - memset(kaddr + bh_offset(bh), 0, - blocksize); - kunmap_atomic(kaddr, KM_USER0); - flush_dcache_page(page); + zero_user_page(page, bh_offset(bh), + blocksize, KM_USER0); set_buffer_uptodate(bh); } mark_buffer_dirty(bh); @@ -751,10 +742,8 @@ map_buffer_cached: if (!buffer_uptodate(bh)) set_buffer_uptodate(bh); } else if (!buffer_uptodate(bh)) { - u8 *kaddr = kmap_atomic(page, KM_USER0); - memset(kaddr + bh_offset(bh), 0, blocksize); - kunmap_atomic(kaddr, KM_USER0); - flush_dcache_page(page); + zero_user_page(page, bh_offset(bh), blocksize, + KM_USER0); set_buffer_uptodate(bh); } continue; @@ -878,11 +867,8 @@ rl_not_mapped_enoent: if (!buffer_uptodate(bh)) set_buffer_uptodate(bh); } else if (!buffer_uptodate(bh)) { - u8 *kaddr = kmap_atomic(page, KM_USER0); - memset(kaddr + bh_offset(bh), 0, - blocksize); - kunmap_atomic(kaddr, KM_USER0); - flush_dcache_page(page); + zero_user_page(page, bh_offset(bh), + blocksize, KM_USER0); set_buffer_uptodate(bh); } continue; @@ -1137,16 +1123,12 @@ rl_not_mapped_enoent: * to zero the overflowing region. */ if (unlikely(bh_pos + blocksize > initialized_size)) { - u8 *kaddr; int ofs = 0; if (likely(bh_pos < initialized_size)) ofs = initialized_size - bh_pos; - kaddr = kmap_atomic(page, KM_USER0); - memset(kaddr + bh_offset(bh) + ofs, 0, - blocksize - ofs); - kunmap_atomic(kaddr, KM_USER0); - flush_dcache_page(page); + zero_user_page(page, bh_offset(bh) + ofs, + blocksize - ofs, KM_USER0); } } else /* if (unlikely(!buffer_uptodate(bh))) */ err = -EIO; @@ -1286,11 +1268,8 @@ rl_not_mapped_enoent: if (PageUptodate(page)) set_buffer_uptodate(bh); else { - u8 *kaddr = kmap_atomic(page, KM_USER0); - memset(kaddr + bh_offset(bh), 0, - blocksize); - kunmap_atomic(kaddr, KM_USER0); - flush_dcache_page(page); + zero_user_page(page, bh_offset(bh), + blocksize, KM_USER0); set_buffer_uptodate(bh); } } @@ -1350,9 +1329,7 @@ err_out: len = PAGE_CACHE_SIZE; if (len > bytes) len = bytes; - kaddr = kmap_atomic(*pages, KM_USER0); - memset(kaddr, 0, len); - kunmap_atomic(kaddr, KM_USER0); + zero_user_page(*pages, 0, len, KM_USER0); } goto out; } @@ -1473,9 +1450,7 @@ err_out: len = PAGE_CACHE_SIZE; if (len > bytes) len = bytes; - kaddr = kmap_atomic(*pages, KM_USER0); - memset(kaddr, 0, len); - kunmap_atomic(kaddr, KM_USER0); + zero_user_page(*pages, 0, len, KM_USER0); } goto out; } |