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Message-Id: <1431367690-5223-101-git-send-email-viro@ZenIV.linux.org.uk> Date: Mon, 11 May 2015 19:08:01 +0100 From: Al Viro <viro@...IV.linux.org.uk> To: Linus Torvalds <torvalds@...ux-foundation.org> Cc: Neil Brown <neilb@...e.de>, Christoph Hellwig <hch@...radead.org>, linux-kernel@...r.kernel.org, linux-fsdevel@...r.kernel.org Subject: [PATCH v3 101/110] namei: make put_link() RCU-safe From: Al Viro <viro@...iv.linux.org.uk> very simple - just make path_put() conditional on !RCU. Note that right now it doesn't get called in RCU mode - we leave it before getting anything into stack. Signed-off-by: Al Viro <viro@...iv.linux.org.uk> --- fs/namei.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/fs/namei.c b/fs/namei.c index 4303404..998c3c2 100644 --- a/fs/namei.c +++ b/fs/namei.c @@ -750,7 +750,8 @@ static inline void put_link(struct nameidata *nd) struct inode *inode = last->inode; if (last->cookie && inode->i_op->put_link) inode->i_op->put_link(inode, last->cookie); - path_put(&last->link); + if (!(nd->flags & LOOKUP_RCU)) + path_put(&last->link); } int sysctl_protected_symlinks __read_mostly = 0; -- 2.1.4 -- 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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