On Tue, Apr 07, 2020 at 07:50:30AM +0200, Christophe Leroy wrote: > > > Le 20/03/2020 à 11:20, Michal Suchanek a écrit : > > There are numerous references to 32bit functions in generic and 64bit > > code so ifdef them out. > > > > Signed-off-by: Michal Suchanek <msuchanek@xxxxxxx> > > --- > > v2: > > - fix 32bit ifdef condition in signal.c > > - simplify the compat ifdef condition in vdso.c - 64bit is redundant > > - simplify the compat ifdef condition in callchain.c - 64bit is redundant > > v3: > > - use IS_ENABLED and maybe_unused where possible > > - do not ifdef declarations > > - clean up Makefile > > v4: > > - further makefile cleanup > > - simplify is_32bit_task conditions > > - avoid ifdef in condition by using return > > v5: > > - avoid unreachable code on 32bit > > - make is_current_64bit constant on !COMPAT > > - add stub perf_callchain_user_32 to avoid some ifdefs > > v6: > > - consolidate current_is_64bit > > v7: > > - remove leftover perf_callchain_user_32 stub from previous series version > > v8: > > - fix build again - too trigger-happy with stub removal > > - remove a vdso.c hunk that causes warning according to kbuild test robot > > v9: > > - removed current_is_64bit in previous patch > > v10: > > - rebase on top of 70ed86f4de5bd > > --- > > arch/powerpc/include/asm/thread_info.h | 4 ++-- > > arch/powerpc/kernel/Makefile | 6 +++--- > > arch/powerpc/kernel/entry_64.S | 2 ++ > > arch/powerpc/kernel/signal.c | 3 +-- > > arch/powerpc/kernel/syscall_64.c | 6 ++---- > > arch/powerpc/kernel/vdso.c | 3 ++- > > arch/powerpc/perf/callchain.c | 8 +++++++- > > 7 files changed, 19 insertions(+), 13 deletions(-) > > > > [...] > > > diff --git a/arch/powerpc/kernel/syscall_64.c b/arch/powerpc/kernel/syscall_64.c > > index 87d95b455b83..2dcbfe38f5ac 100644 > > --- a/arch/powerpc/kernel/syscall_64.c > > +++ b/arch/powerpc/kernel/syscall_64.c > > @@ -24,7 +24,6 @@ notrace long system_call_exception(long r3, long r4, long r5, > > long r6, long r7, long r8, > > unsigned long r0, struct pt_regs *regs) > > { > > - unsigned long ti_flags; > > syscall_fn f; > > if (IS_ENABLED(CONFIG_PPC_IRQ_SOFT_MASK_DEBUG)) > > @@ -68,8 +67,7 @@ notrace long system_call_exception(long r3, long r4, long r5, > > local_irq_enable(); > > - ti_flags = current_thread_info()->flags; > > - if (unlikely(ti_flags & _TIF_SYSCALL_DOTRACE)) { > > + if (unlikely(current_thread_info()->flags & _TIF_SYSCALL_DOTRACE)) { > > /* > > * We use the return value of do_syscall_trace_enter() as the > > * syscall number. If the syscall was rejected for any reason > > @@ -94,7 +92,7 @@ notrace long system_call_exception(long r3, long r4, long r5, > > /* May be faster to do array_index_nospec? */ > > barrier_nospec(); > > - if (unlikely(ti_flags & _TIF_32BIT)) { > > + if (unlikely(is_32bit_task())) { > > is_compat() should be used here instead, because we dont want to use is_compat_task() > compat_sys_call_table() on PPC32. > > > f = (void *)compat_sys_call_table[r0]; > > r3 &= 0x00000000ffffffffULL; > That only applies once you use this for 32bit as well. Right now it's 64bit only so the two are the same. Thanks Michal