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* [PATCH] list.h: don't evaluate macro args multiple timesZach Brown2006-02-03
| | | | | | | | | | | | | | | | | | | I noticed that list.h init functions were evaluating macro arguments multiple times and thought it might be nice to protect the unsuspecting caller. Converting the macros to inline functions seems to reduce code size, too. A i386 defconfig build with gcc 3.3.3 from fc4: text data bss dec hex filename 3573148 565664 188828 4327640 4208d8 vmlinux.before 3572177 565664 188828 4326669 42050d vmlinux add/remove: 0/0 grow/shrink: 11/144 up/down: 88/-1016 (-928) There was no difference in checkstack output. Signed-off-by: Zach Brown <zach.brown@oracle.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] Add list_for_each_entry_safe_reverse()David Howells2006-01-10
| | | | | | | | | | | | | Add list_for_each_entry_safe_reverse() to linux/list.h This is needed by unmerged cachefs and be an as-yet-unreviewed device_shutdown() fix. Signed-off-by: David Howells <dhowells@redhat.com> Cc: Patrick Mochel <mochel@digitalimplant.org> Cc: Greg KH <greg@kroah.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] add hlist_replace_rcu()Ingo Molnar2005-12-12
| | | | | | | | | Add list_replace_rcu: replace old entry by new one. Signed-off-by: Paul E. McKenney <paulmck@us.ibm.com> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] Remove hlist_for_each_rcu() API, convert existing use to ↵Paul E. McKenney2005-11-07
| | | | | | | | | | | | | hlist_for_each_entry_rcu Remove the hlist_for_each_rcu() API, which is used only in one place, and is trivially converted to hlist_for_each_entry_rcu(), making the code shorter and more readable. Any out-of-tree uses may be similarly converted. Signed-off-by: "Paul E. McKenney" <paulmck@us.ibm.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] list: add missing rcu_dereference on first elementHerbert Xu2005-10-17
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | It seems that all the list_*_rcu primitives are missing a memory barrier on the very first dereference. For example, #define list_for_each_rcu(pos, head) \ for (pos = (head)->next; prefetch(pos->next), pos != (head); \ pos = rcu_dereference(pos->next)) It will go something like: pos = (head)->next prefetch(pos->next) pos != (head) do stuff We're missing a barrier here. pos = rcu_dereference(pos->next) fetch pos->next barrier given by rcu_dereference(pos->next) store pos Without the missing barrier, the pos->next value may turn out to be stale. In fact, if "do stuff" were also dereferencing pos and relying on list_for_each_rcu to provide the barrier then it may also break. So here is a patch to make sure that we have a barrier for the first element in the list. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au> Acked-by: "Paul E. McKenney" <paulmck@us.ibm.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [LIST]: Add docbook header comments for hlist_add_{before,after}_rcu()Paul E. McKenney2005-08-29
| | | | Signed-off-by: David S. Miller <davem@davemloft.net>
* [IPV4]: Prepare FIB core for RCU.Robert Olsson2005-08-29
| | | | | | | | | * RCU versions of hlist_***_rcu * fib_alias partial rcu port just whats needed now. Signed-off-by: Robert Olsson <Robert.Olsson@data.slu.se> Signed-off-by: Stephen Hemminger <shemminger@osdl.org> Signed-off-by: David S. Miller <davem@davemloft.net>
* [CCID3]: Separate most of the packet history codeArnaldo Carvalho de Melo2005-08-29
| | | | | | | | | | This also changes the list_for_each_entry_safe_continue behaviour to match its kerneldoc comment, that is, to start after the pos passed. Also adds several helper functions from previously open coded fragments, making the code more clear. Signed-off-by: Arnaldo Carvalho de Melo <acme@mandriva.com>
* [LIST]: Introduce list_for_each_entry_safe_continueArnaldo Carvalho de Melo2005-08-29
| | | | | | | Used in the dccp CCID3 code, that is going to be submitted RSN. Signed-off-by: Arnaldo Carvalho de Melo <acme@ghostprotocols.net> Signed-off-by: David S. Miller <davem@davemloft.net>
* [PATCH] RCU: clean up a few remaining synchronize_kernel() callsPaul E. McKenney2005-06-25
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 2.6.12-rc6-mm1 has a few remaining synchronize_kernel()s, some (but not all) in comments. This patch changes these synchronize_kernel() calls (and comments) to synchronize_rcu() or synchronize_sched() as follows: - arch/x86_64/kernel/mce.c mce_read(): change to synchronize_sched() to handle races with machine-check exceptions (synchronize_rcu() would not cut it given RCU implementations intended for hardcore realtime use. - drivers/input/serio/i8042.c i8042_stop(): change to synchronize_sched() to handle races with i8042_interrupt() interrupt handler. Again, synchronize_rcu() would not cut it given RCU implementations intended for hardcore realtime use. - include/*/kdebug.h comments: change to synchronize_sched() to handle races with NMIs. As before, synchronize_rcu() would not cut it... - include/linux/list.h comment: change to synchronize_rcu(), since this comment is for list_del_rcu(). - security/keys/key.c unregister_key_type(): change to synchronize_rcu(), since this is interacting with RCU read side. - security/keys/process_keys.c install_session_keyring(): change to synchronize_rcu(), since this is interacting with RCU read side. Signed-off-by: "Paul E. McKenney" <paulmck@us.ibm.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] Fix comment in list.h that refers to nonexistent APIPaul E. McKenney2005-04-16
| | | | | | | | | The hlist_for_each_entry_rcu() comment block refers to a nonexistent hlist_add_rcu() API, needs to change to hlist_add_head_rcu(). Signed-off-by: Paul E. McKenney <paulmck@us.ibm.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* Linux-2.6.12-rc2v2.6.12-rc2Linus Torvalds2005-04-16
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!