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author | 2015-08-25 20:45:18 +0200 | |
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committer | 2015-09-20 20:50:06 -0700 | |
commit | 66e8c57da6bf6b847a48a5a6fda59512f733ed78 (patch) | |
tree | 42644ac73db43dfe197dad53763879ff4896cd0d /kernel/rcu/tree.c | |
parent | Linux 4.3-rc2 (diff) | |
download | linux-dev-66e8c57da6bf6b847a48a5a6fda59512f733ed78.tar.xz linux-dev-66e8c57da6bf6b847a48a5a6fda59512f733ed78.zip |
rcu: Change _wait_rcu_gp() to work around GCC bug 67055
Code like this in inline functions confuses some recent versions of gcc:
const int n = const-expr;
whatever_t array[n];
For more details, see:
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67055#c13
This compiler bug results in the following failure after 114b7fd4b (rcu:
Create rcu_sync infrastructure):
In file included from include/linux/rcupdate.h:429:0,
from include/linux/rcu_sync.h:5,
from kernel/rcu/sync.c:1:
include/linux/rcutiny.h: In function 'rcu_barrier_sched':
include/linux/rcutiny.h:55:20: internal compiler error: Segmentation fault
static inline void rcu_barrier_sched(void)
This commit therefore eliminates the constant local variable in favor of
direct use of the expression.
Reported-and-tested-by: Mark Salter <msalter@redhat.com>
Reported-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Oleg Nesterov <oleg@redhat.com>
Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Diffstat (limited to 'kernel/rcu/tree.c')
0 files changed, 0 insertions, 0 deletions