On Wed, Sep 06, 2017 at 05:44:58PM -0500, Miguel Bernal Marin wrote: > Some warning were showed by objtool using gcc 7.2.0 > > kernel/locking/rwsem.o: warning: objtool: up_read()+0x11: call without frame > pointer save/setup > kernel/locking/rwsem.o: warning: objtool: up_write()+0x17: call without frame > pointer save/setup > kernel/locking/rwsem.o: warning: objtool: downgrade_write()+0x22: call > without frame pointer save/setup > > which means gcc placed an inline asm function and its call instruction before > the frame pointer setup. > > This series forces a stack frame to be created before the call instruction > by listing the stack pointer as an output operand in the inline asm statement. > > Changes in v2: > - Update first parameter from _ASM_ADD to '%3' at __downgrade_write() > > Miguel Bernal Marin (3): > locking/rwsem/x86: Add stack frame dependency for __up_read() > locking/rwsem/x86: Add stack frame dependency for __up_write() > locking/rwsem/x86: Add stack frame dependency for __downgrade_write() > > arch/x86/include/asm/rwsem.h | 18 ++++++++++++------ > 1 file changed, 12 insertions(+), 6 deletions(-)
For the series: Reviewed-by: Josh Poimboeuf <jpoim...@redhat.com> -- Josh
