Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755618Ab2KVSqX (ORCPT ); Thu, 22 Nov 2012 13:46:23 -0500 Received: from aserp1050.oracle.com ([141.146.126.70]:35735 "EHLO aserp1050.oracle.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755505Ab2KVSqR (ORCPT ); Thu, 22 Nov 2012 13:46:17 -0500 From: Dave Kleikamp To: linux-fsdevel@vger.kernel.org Cc: linux-kernel@vger.kernel.org, Zach Brown , "Maxim V. Patlasov" , Dave Kleikamp Subject: [PATCH v4 02/31] iov_iter: iov_iter_copy_from_user() should use non-atomic copy Date: Wed, 21 Nov 2012 16:40:42 -0600 Message-Id: <1353537671-26284-3-git-send-email-dave.kleikamp@oracle.com> X-Mailer: git-send-email 1.8.0 In-Reply-To: <1353537671-26284-1-git-send-email-dave.kleikamp@oracle.com> References: <1353537671-26284-1-git-send-email-dave.kleikamp@oracle.com> X-Source-IP: aserp1040.oracle.com [141.146.126.69] Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 2030 Lines: 62 Signed-off-by: Dave Kleikamp --- mm/iov-iter.c | 17 ++++++++++------- 1 file changed, 10 insertions(+), 7 deletions(-) diff --git a/mm/iov-iter.c b/mm/iov-iter.c index 83f7594..5c4f3a5 100644 --- a/mm/iov-iter.c +++ b/mm/iov-iter.c @@ -6,8 +6,8 @@ #include #include -static size_t __iovec_copy_from_user_inatomic(char *vaddr, - const struct iovec *iov, size_t base, size_t bytes) +static size_t __iovec_copy_from_user(char *vaddr, const struct iovec *iov, + size_t base, size_t bytes, int atomic) { size_t copied = 0, left = 0; @@ -16,7 +16,10 @@ static size_t __iovec_copy_from_user_inatomic(char *vaddr, int copy = min(bytes, iov->iov_len - base); base = 0; - left = __copy_from_user_inatomic(vaddr, buf, copy); + if (atomic) + left = __copy_from_user_inatomic(vaddr, buf, copy); + else + left = __copy_from_user(vaddr, buf, copy); copied += copy; bytes -= copy; vaddr += copy; @@ -47,8 +50,8 @@ size_t iov_iter_copy_from_user_atomic(struct page *page, left = __copy_from_user_inatomic(kaddr + offset, buf, bytes); copied = bytes - left; } else { - copied = __iovec_copy_from_user_inatomic(kaddr + offset, - i->iov, i->iov_offset, bytes); + copied = __iovec_copy_from_user(kaddr + offset, i->iov, + i->iov_offset, bytes, 1); } kunmap_atomic(kaddr); @@ -75,8 +78,8 @@ size_t iov_iter_copy_from_user(struct page *page, left = __copy_from_user(kaddr + offset, buf, bytes); copied = bytes - left; } else { - copied = __iovec_copy_from_user_inatomic(kaddr + offset, - i->iov, i->iov_offset, bytes); + copied = __iovec_copy_from_user(kaddr + offset, i->iov, + i->iov_offset, bytes, 0); } kunmap(page); return copied; -- 1.8.0 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/