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Date: Mon, 29 Jan 2007 11:31:56 +0100 (CET) From: Nick Piggin <npiggin@...e.de> To: Andrew Morton <akpm@...l.org> Cc: Linux Kernel <linux-kernel@...r.kernel.org>, Linux Filesystems <linux-fsdevel@...r.kernel.org>, Nick Piggin <npiggin@...e.de>, Linux Memory Management <linux-mm@...ck.org> Subject: [patch 2/9] mm: revert "generic_file_buffered_write(): handle zero length iovec segments" From: Andrew Morton <akpm@...l.org> Revert 81b0c8713385ce1b1b9058e916edcf9561ad76d6. This was a bugfix against 6527c2bdf1f833cc18e8f42bd97973d583e4aa83, which we also revert. Signed-off-by: Andrew Morton <akpm@...l.org> Signed-off-by: Nick Piggin <npiggin@...e.de> Index: linux-2.6/mm/filemap.c =================================================================== --- linux-2.6.orig/mm/filemap.c +++ linux-2.6/mm/filemap.c @@ -1911,12 +1911,6 @@ generic_file_buffered_write(struct kiocb break; } - if (unlikely(bytes == 0)) { - status = 0; - copied = 0; - goto zero_length_segment; - } - status = a_ops->prepare_write(file, page, offset, offset+bytes); if (unlikely(status)) { loff_t isize = i_size_read(inode); @@ -1946,8 +1940,7 @@ generic_file_buffered_write(struct kiocb page_cache_release(page); continue; } -zero_length_segment: - if (likely(copied >= 0)) { + if (likely(copied > 0)) { if (!status) status = copied; Index: linux-2.6/mm/filemap.h =================================================================== --- linux-2.6.orig/mm/filemap.h +++ linux-2.6/mm/filemap.h @@ -87,7 +87,7 @@ filemap_set_next_iovec(const struct iove const struct iovec *iov = *iovp; size_t base = *basep; - do { + while (bytes) { int copy = min(bytes, iov->iov_len - base); bytes -= copy; @@ -96,7 +96,7 @@ filemap_set_next_iovec(const struct iove iov++; base = 0; } - } while (bytes); + } *iovp = iov; *basep = base; } - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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