Commit-ID: 54e6c11b9e74fd780e52f95c3eed313e0f4e6b7e
Gitweb: https://git.kernel.org/tip/54e6c11b9e74fd780e52f95c3eed313e0f4e6b7e
Author: Joel Fernandes (Google) <joel@xxxxxxxxxxxxxxxxx>
AuthorDate: Sun, 7 Apr 2019 20:47:19 -0400
Committer: Paul E. McKenney <paulmck@xxxxxxxxxxxxx>
CommitDate: Tue, 28 May 2019 09:03:35 -0700
srcu: Remove unused vmlinux srcu linker entries
The SRCU for modules optimization (commit title "srcu: Allocate per-CPU
data for DEFINE_SRCU() in modules") introduced vmlinux linker entries
which is unused since it applies only to the built-in vmlinux. So remove
it to prevent any space usage due to the 8 byte alignment it added.
vmlinux.lds.h has no effect on module loading and is not used for
building the module object, so the changes were not needed in the first
place since the optimization is specific to modules.
Tested with SRCU torture_type and rcutorture. Put prints in module
loader to confirm it is able to find and initialize the srcu structures.
Cc: Josh Triplett <josh@xxxxxxxxxxxxxxxx>
Cc: Steven Rostedt <rostedt@xxxxxxxxxxx>
Cc: Mathieu Desnoyers <mathieu.desnoyers@xxxxxxxxxxxx>
Cc: Lai Jiangshan <jiangshanlai@xxxxxxxxx>
Cc: kernel-team@xxxxxxxxxxx
Cc: paulmck@xxxxxxxxxxxxxxxxxx
Signed-off-by: Joel Fernandes (Google) <joel@xxxxxxxxxxxxxxxxx>
Signed-off-by: Paul E. McKenney <paulmck@xxxxxxxxxxxxx>
---
include/asm-generic/vmlinux.lds.h | 4 ----
1 file changed, 4 deletions(-)
diff --git a/include/asm-generic/vmlinux.lds.h b/include/asm-generic/vmlinux.lds.h
index ba1ad39468fc..088987e9a3ea 100644
--- a/include/asm-generic/vmlinux.lds.h
+++ b/include/asm-generic/vmlinux.lds.h
@@ -337,10 +337,6 @@
KEEP(*(__tracepoints_ptrs)) /* Tracepoints: pointer array */ \
__stop___tracepoints_ptrs = .; \
*(__tracepoints_strings)/* Tracepoints: strings */ \
- . = ALIGN(8); \
- __start___srcu_struct = .; \
- *(___srcu_struct_ptrs) \
- __end___srcu_struct = .; \
} \
\
.rodata1 : AT(ADDR(.rodata1) - LOAD_OFFSET) { \
|