diff options
Diffstat (limited to 'patches/linux-2.6.16.31/rcu_needs_cpu.patch')
| -rw-r--r-- | patches/linux-2.6.16.31/rcu_needs_cpu.patch | 35 |
1 files changed, 35 insertions, 0 deletions
diff --git a/patches/linux-2.6.16.31/rcu_needs_cpu.patch b/patches/linux-2.6.16.31/rcu_needs_cpu.patch new file mode 100644 index 0000000000..c8f3b79229 --- /dev/null +++ b/patches/linux-2.6.16.31/rcu_needs_cpu.patch @@ -0,0 +1,35 @@ +diff -pruN ../orig-linux-2.6.16.29/include/linux/rcupdate.h ./include/linux/rcupdate.h +--- ../orig-linux-2.6.16.29/include/linux/rcupdate.h 2006-09-12 19:02:10.000000000 +0100 ++++ ./include/linux/rcupdate.h 2006-09-19 14:05:39.000000000 +0100 +@@ -134,6 +134,7 @@ static inline void rcu_bh_qsctr_inc(int + } + + extern int rcu_pending(int cpu); ++extern int rcu_needs_cpu(int cpu); + + /** + * rcu_read_lock - mark the beginning of an RCU read-side critical section. +diff -pruN ../orig-linux-2.6.16.29/kernel/rcupdate.c ./kernel/rcupdate.c +--- ../orig-linux-2.6.16.29/kernel/rcupdate.c 2006-09-12 19:02:10.000000000 +0100 ++++ ./kernel/rcupdate.c 2006-09-19 14:05:39.000000000 +0100 +@@ -485,6 +485,20 @@ int rcu_pending(int cpu) + __rcu_pending(&rcu_bh_ctrlblk, &per_cpu(rcu_bh_data, cpu)); + } + ++/* ++ * Check to see if any future RCU-related work will need to be done ++ * by the current CPU, even if none need be done immediately, returning ++ * 1 if so. This function is part of the RCU implementation; it is -not- ++ * an exported member of the RCU API. ++ */ ++int rcu_needs_cpu(int cpu) ++{ ++ struct rcu_data *rdp = &per_cpu(rcu_data, cpu); ++ struct rcu_data *rdp_bh = &per_cpu(rcu_bh_data, cpu); ++ ++ return (!!rdp->curlist || !!rdp_bh->curlist || rcu_pending(cpu)); ++} ++ + void rcu_check_callbacks(int cpu, int user) + { + if (user || |