Gitweb:
http://git.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=5efe92c68045817b97927b748f369d407c1d89ab
Commit: 5efe92c68045817b97927b748f369d407c1d89ab
Parent: 2b79aac9038ee52fd8d89216b1a3ec9bd8285fac
Author: David Howells <[EMAIL PROTECTED]>
AuthorDate: Tue Feb 19 18:58:54 2008 +0000
Committer: Linus Torvalds <[EMAIL PROTECTED]>
CommitDate: Tue Feb 19 15:51:36 2008 -0800
MN10300: Introduce barriers to replace removed volatiles in gdbstub
Introduce into the MN10300 gdbstub a couple of barrier() calls to replace
the
removed volatility of the input/output index variables for the Rx ring
buffer.
Signed-off-by: David Howells <[EMAIL PROTECTED]>
Signed-off-by: Linus Torvalds <[EMAIL PROTECTED]>
---
arch/mn10300/kernel/gdb-io-ttysm.c | 2 ++
1 files changed, 2 insertions(+), 0 deletions(-)
diff --git a/arch/mn10300/kernel/gdb-io-ttysm.c
b/arch/mn10300/kernel/gdb-io-ttysm.c
index c545159..e94c25e 100644
--- a/arch/mn10300/kernel/gdb-io-ttysm.c
+++ b/arch/mn10300/kernel/gdb-io-ttysm.c
@@ -196,6 +196,7 @@ int gdbstub_io_rx_char(unsigned char *_ch, int nonblock)
try_again:
/* pull chars out of the buffer */
ix = gdbstub_rx_outp;
+ barrier();
if (ix == gdbstub_rx_inp) {
if (nonblock)
return -EAGAIN;
@@ -207,6 +208,7 @@ try_again:
ch = gdbstub_rx_buffer[ix++];
st = gdbstub_rx_buffer[ix++];
+ barrier();
gdbstub_rx_outp = ix & (PAGE_SIZE - 1);
st &= SC01STR_RXF | SC01STR_RBF | SC01STR_FEF | SC01STR_PEF |
-
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