Commit 24d559ca authored by David S. Miller's avatar David S. Miller

[SPARC64]: store-init needs trailing membar.

The manual says that it is required and we actually have crash reports
where loads see stale data due to not having membars here.

In one case the networking does:

	memset(skb, 0, offsetof(struct sk_buff, truesize));

and then some code later checks skb->nohdr for zero, but it's still
the value that was there before the memset().

Note that arch/sparc64/lib/xor.S already got this right.
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 5851fadc
......@@ -546,6 +546,7 @@ NGtsb_init:
subcc %o1, 0x100, %o1
bne,pt %xcc, 1b
add %o0, 0x100, %o0
membar #Sync
retl
wr %g2, 0x0, %asi
.size NGtsb_init, .-NGtsb_init
......@@ -88,6 +88,7 @@ NGbzero_loop:
bne,pt %xcc, NGbzero_loop
add %o0, 64, %o0
membar #Sync
wr %o4, 0x0, %asi
brz,pn %o1, NGbzero_done
NGbzero_medium:
......
......@@ -247,6 +247,8 @@ FUNC_NAME: /* %o0=dst, %o1=src, %o2=len */
/* fall through */
60:
membar #Sync
/* %o2 contains any final bytes still needed to be copied
* over. If anything is left, we copy it one byte at a time.
*/
......
......@@ -41,6 +41,7 @@ NGcopy_user_page: /* %o0=dest, %o1=src, %o2=vaddr */
subcc %g7, 64, %g7
bne,pt %xcc, 1b
add %o0, 32, %o0
membar #Sync
retl
nop
......@@ -63,6 +64,7 @@ NGclear_user_page: /* %o0=dest, %o1=vaddr */
subcc %g7, 64, %g7
bne,pt %xcc, 1b
add %o0, 32, %o0
membar #Sync
retl
nop
......
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