The patch titled
tty: remove useless memory barrier
has been removed from the -mm tree. Its filename was
tty-remove-useless-memory-barrier.patch
This patch was dropped because it was merged into mainline or a subsystem tree
------------------------------------------------------
Subject: tty: remove useless memory barrier
From: Ralf Baechle <ralf@xxxxxxxxxxxxxx>
I don't see why there is a memory barrier in copy_from_read_buf() at all.
Even if it was useful spin_unlock_irqrestore implies a barrier.
Signed-off-by: Ralf Baechle <ralf@xxxxxxxxxxxxxx>
Cc: Alan Cox <alan@xxxxxxxxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxx>
---
drivers/char/n_tty.c | 1 -
1 file changed, 1 deletion(-)
diff -puN drivers/char/n_tty.c~tty-remove-useless-memory-barrier drivers/char/n_tty.c
--- a/drivers/char/n_tty.c~tty-remove-useless-memory-barrier
+++ a/drivers/char/n_tty.c
@@ -1151,7 +1151,6 @@ static int copy_from_read_buf(struct tty
n = min(*nr, n);
spin_unlock_irqrestore(&tty->read_lock, flags);
if (n) {
- mb();
retval = copy_to_user(*b, &tty->read_buf[tty->read_tail], n);
n -= retval;
spin_lock_irqsave(&tty->read_lock, flags);
_
Patches currently in -mm which might be from ralf@xxxxxxxxxxxxxx are
fix-namespace-conflict-between-w9968cfc-on-mips.patch
make-lm70_remove-a-__devexit-function.patch
mips-dbg_io-stray-brackets-fix.patch
git-mtd.patch
fix-pnx8550-serial-breakage.patch
pnx8550-uart-driver.patch
pci-legacy-resource-fix.patch
pci-legacy-resource-fix-tidy.patch
xfs-remove-useless-wmb-memory-barrier.patch
-
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