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linux-stable/net/sunrpc
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J. Bruce Fields fdef7aa5d4 svcrpc: ensure cache_check caller sees updated entry 
Supposes cache_check runs simultaneously with an update on a different
CPU:

	cache_check			task doing update
	^^^^^^^^^^^			^^^^^^^^^^^^^^^^^

	1. test for CACHE_VALID		1'. set entry->data
	   & !CACHE_NEGATIVE

	2. use entry->data		2'. set CACHE_VALID

If the two memory writes performed in step 1' and 2' appear misordered
with respect to the reads in step 1 and 2, then the caller could get
stale data at step 2 even though it saw CACHE_VALID set on the cache
entry.

Add memory barriers to prevent this.

Reviewed-by: NeilBrown <neilb@suse.de>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
2011-01-04 16:49:25 -05:00
..
auth_gss net/sunrpc/auth_gss/gss_krb5_crypto.c: Use normal negative error value return 2010-12-17 15:48:22 -05:00
xprtrdma sunrpc/xprtrdma: clean up workqueue usage 2010-10-21 10:11:45 -04:00
addr.c include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h 2010-03-30 22:02:32 +09:00
auth.c Merge branch 'for-2.6.37' of git://linux-nfs.org/~bfields/linux 2010-10-26 09:55:25 -07:00
auth_generic.c sunrpc: fix up rpcauth_remove_module section mismatch 2010-09-29 12:27:37 -04:00
auth_null.c SUNRPC: Move the bound cred to struct rpc_rqst 2010-08-04 08:54:09 -04:00
auth_unix.c SUNRPC: Move the bound cred to struct rpc_rqst 2010-08-04 08:54:09 -04:00
backchannel_rqst.c include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h 2010-03-30 22:02:32 +09:00
bc_svc.c Merge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6 2010-04-11 14:53:53 -07:00
cache.c svcrpc: ensure cache_check caller sees updated entry 2011-01-04 16:49:25 -05:00
clnt.c SUNRPC: Fix an infinite loop in call_refresh/call_refreshresult 2010-11-22 13:22:39 -05:00
Kconfig nfsd4: remove spkm3 2010-10-01 18:09:55 -04:00
Makefile
netns.h sunrpc: Make the ip_map_cache be per-net 2010-09-27 10:16:12 -04:00
rpc_pipe.c convert get_sb_single() users 2010-10-29 04:16:28 -04:00
rpcb_clnt.c Merge branch 'for-2.6.37' of git://linux-nfs.org/~bfields/linux 2010-10-26 09:55:25 -07:00
sched.c Merge branch 'nfs-for-2.6.37' of git://git.linux-nfs.org/projects/trondmy/nfs-2.6 2010-10-25 13:48:29 -07:00
socklib.c include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h 2010-03-30 22:02:32 +09:00
stats.c SUNRPC: Simplify rpc_alloc_iostats by removing pointless local variable 2010-11-16 11:58:51 -05:00
sunrpc.h
sunrpc_syms.c sunrpc: Make the ip_map_cache be per-net 2010-09-27 10:16:12 -04:00
svc.c svcrpc: simpler request dropping 2011-01-04 16:49:22 -05:00
svc_xprt.c svcrpc: simpler request dropping 2011-01-04 16:49:22 -05:00
svcauth.c net: sunrpc: kill unused macros 2010-12-17 15:48:21 -05:00
svcauth_unix.c SUNRPC: Remove more code when NFSD_DEPRECATED is not configured 2011-01-04 16:48:02 -05:00
svcsock.c sunrpc: svc_sock_names should hold ref to socket being closed. 2010-12-17 15:48:19 -05:00
sysctl.c
timer.c
xdr.c SUNRPC: Add a helper function xdr_inline_peek 2010-10-23 15:27:32 -04:00
xprt.c sunrpc: Turn list_for_each-s into the ..._entry-s 2010-10-19 10:48:16 -04:00
xprtsock.c Merge branch 'for-2.6.37' of git://linux-nfs.org/~bfields/linux 2010-10-26 09:55:25 -07:00