From: Joel Fernandes (Google) Date: Mon, 8 Apr 2019 00:47:19 +0000 (-0400) Subject: srcu: Remove unused vmlinux srcu linker entries X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=54e6c11b9e74fd780e52f95c3eed313e0f4e6b7e;p=linux.git 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 Cc: Steven Rostedt Cc: Mathieu Desnoyers Cc: Lai Jiangshan Cc: kernel-team@android.com Cc: paulmck@linux.vnet.ibm.com Signed-off-by: Joel Fernandes (Google) Signed-off-by: Paul E. McKenney --- diff --git a/include/asm-generic/vmlinux.lds.h b/include/asm-generic/vmlinux.lds.h index ba1ad39468fc1..088987e9a3eaa 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) { \