Re: [PATCH v7 4/6] powerpc/64: make buildable without CONFIG_COMPAT
On Fri, 30 Aug 2019 23:03:41 +0200 Michal Suchanek wrote: > There are numerous references to 32bit functions in generic and 64bit > code so ifdef them out. > > Signed-off-by: Michal Suchanek > --- > 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 removed too much stuff here > --- > arch/powerpc/include/asm/thread_info.h | 4 ++-- > arch/powerpc/kernel/Makefile | 7 +++--- > 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 | 5 ++--- > arch/powerpc/perf/callchain.c | 31 +- > 7 files changed, 27 insertions(+), 31 deletions(-) > > diff --git a/arch/powerpc/include/asm/thread_info.h > b/arch/powerpc/include/asm/thread_info.h > index 8e1d0195ac36..c128d8a48ea3 100644 > --- a/arch/powerpc/include/asm/thread_info.h > +++ b/arch/powerpc/include/asm/thread_info.h > @@ -144,10 +144,10 @@ static inline bool test_thread_local_flags(unsigned int > flags) > return (ti->local_flags & flags) != 0; > } > > -#ifdef CONFIG_PPC64 > +#ifdef CONFIG_COMPAT > #define is_32bit_task() (test_thread_flag(TIF_32BIT)) > #else > -#define is_32bit_task() (1) > +#define is_32bit_task() (IS_ENABLED(CONFIG_PPC32)) > #endif > > #if defined(CONFIG_PPC64) > diff --git a/arch/powerpc/kernel/Makefile b/arch/powerpc/kernel/Makefile > index 1d646a94d96c..9d8772e863b9 100644 > --- a/arch/powerpc/kernel/Makefile > +++ b/arch/powerpc/kernel/Makefile > @@ -44,16 +44,15 @@ CFLAGS_btext.o += -DDISABLE_BRANCH_PROFILING > endif > > obj-y:= cputable.o ptrace.o syscalls.o \ > -irq.o align.o signal_32.o pmc.o vdso.o \ > +irq.o align.o signal_$(BITS).o pmc.o vdso.o \ > process.o systbl.o idle.o \ > signal.o sysfs.o cacheinfo.o time.o \ > prom.o traps.o setup-common.o \ > udbg.o misc.o io.o misc_$(BITS).o \ > of_platform.o prom_parse.o > -obj-$(CONFIG_PPC64) += setup_64.o sys_ppc32.o \ > -signal_64.o ptrace32.o \ > -paca.o nvram_64.o firmware.o \ > +obj-$(CONFIG_PPC64) += setup_64.o paca.o nvram_64.o firmware.o \ > syscall_64.o > +obj-$(CONFIG_COMPAT) += sys_ppc32.o ptrace32.o signal_32.o > obj-$(CONFIG_VDSO32) += vdso32/ > obj-$(CONFIG_PPC_WATCHDOG) += watchdog.o > obj-$(CONFIG_HAVE_HW_BREAKPOINT) += hw_breakpoint.o > diff --git a/arch/powerpc/kernel/entry_64.S b/arch/powerpc/kernel/entry_64.S > index 2ec825a85f5b..a2dbf216f607 100644 > --- a/arch/powerpc/kernel/entry_64.S > +++ b/arch/powerpc/kernel/entry_64.S > @@ -51,8 +51,10 @@ > SYS_CALL_TABLE: > .tc sys_call_table[TC],sys_call_table > > +#ifdef CONFIG_COMPAT > COMPAT_SYS_CALL_TABLE: > .tc compat_sys_call_table[TC],compat_sys_call_table > +#endif > > /* This value is used to mark exception frames on the stack. */ > exception_marker: > diff --git a/arch/powerpc/kernel/signal.c b/arch/powerpc/kernel/signal.c > index 60436432399f..61678cb0e6a1 100644 > --- a/arch/powerpc/kernel/signal.c > +++ b/arch/powerpc/kernel/signal.c > @@ -247,7 +247,6 @@ static void do_signal(struct task_struct *tsk) > sigset_t *oldset = sigmask_to_save(); > struct ksignal ksig = { .sig = 0 }; > int ret; > - int is32 = is_32bit_task(); > > BUG_ON(tsk != current); > > @@ -277,7 +276,7 @@ static void do_signal(struct task_struct *tsk) > > rseq_signal_deliver(&ksig, tsk->thread.regs); > > - if (is32) { > + if (is_32bit_task()) { > if (ksig.ka.sa.sa_flags & SA_SIGINFO) > ret = handle_rt_signal32(&ksig, oldset, tsk); > else > diff --git a/arch/powerpc/kernel/syscall_64.c > b/arch/powerpc/kernel/syscall_64.c > index 98ed970796d5..0d5cbbe54cf1 100644 > --- a/arch/powerpc/kernel/syscall_64.c > +++ b/arch/powerpc/kernel/syscall_64.c > @@ -38,7 +38,6 @@ typedef long (*syscall_fn)(long, long, long, long, long, > long); > > long system_call_exception(long r3, long r4, long
Re: [PATCH v7 4/6] powerpc/64: make buildable without CONFIG_COMPAT
Le 30/08/2019 à 23:03, 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 Reviewed-by: Christophe Leroy --- 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 --- arch/powerpc/include/asm/thread_info.h | 4 ++-- arch/powerpc/kernel/Makefile | 7 +++--- 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 | 5 ++--- arch/powerpc/perf/callchain.c | 31 +- 7 files changed, 27 insertions(+), 31 deletions(-) diff --git a/arch/powerpc/include/asm/thread_info.h b/arch/powerpc/include/asm/thread_info.h index 8e1d0195ac36..c128d8a48ea3 100644 --- a/arch/powerpc/include/asm/thread_info.h +++ b/arch/powerpc/include/asm/thread_info.h @@ -144,10 +144,10 @@ static inline bool test_thread_local_flags(unsigned int flags) return (ti->local_flags & flags) != 0; } -#ifdef CONFIG_PPC64 +#ifdef CONFIG_COMPAT #define is_32bit_task() (test_thread_flag(TIF_32BIT)) #else -#define is_32bit_task()(1) +#define is_32bit_task()(IS_ENABLED(CONFIG_PPC32)) #endif #if defined(CONFIG_PPC64) diff --git a/arch/powerpc/kernel/Makefile b/arch/powerpc/kernel/Makefile index 1d646a94d96c..9d8772e863b9 100644 --- a/arch/powerpc/kernel/Makefile +++ b/arch/powerpc/kernel/Makefile @@ -44,16 +44,15 @@ CFLAGS_btext.o += -DDISABLE_BRANCH_PROFILING endif obj-y:= cputable.o ptrace.o syscalls.o \ - irq.o align.o signal_32.o pmc.o vdso.o \ + irq.o align.o signal_$(BITS).o pmc.o vdso.o \ process.o systbl.o idle.o \ signal.o sysfs.o cacheinfo.o time.o \ prom.o traps.o setup-common.o \ udbg.o misc.o io.o misc_$(BITS).o \ of_platform.o prom_parse.o -obj-$(CONFIG_PPC64)+= setup_64.o sys_ppc32.o \ - signal_64.o ptrace32.o \ - paca.o nvram_64.o firmware.o \ +obj-$(CONFIG_PPC64)+= setup_64.o paca.o nvram_64.o firmware.o \ syscall_64.o +obj-$(CONFIG_COMPAT) += sys_ppc32.o ptrace32.o signal_32.o obj-$(CONFIG_VDSO32) += vdso32/ obj-$(CONFIG_PPC_WATCHDOG)+= watchdog.o obj-$(CONFIG_HAVE_HW_BREAKPOINT) += hw_breakpoint.o diff --git a/arch/powerpc/kernel/entry_64.S b/arch/powerpc/kernel/entry_64.S index 2ec825a85f5b..a2dbf216f607 100644 --- a/arch/powerpc/kernel/entry_64.S +++ b/arch/powerpc/kernel/entry_64.S @@ -51,8 +51,10 @@ SYS_CALL_TABLE: .tc sys_call_table[TC],sys_call_table +#ifdef CONFIG_COMPAT COMPAT_SYS_CALL_TABLE: .tc compat_sys_call_table[TC],compat_sys_call_table +#endif /* This value is used to mark exception frames on the stack. */ exception_marker: diff --git a/arch/powerpc/kernel/signal.c b/arch/powerpc/kernel/signal.c index 60436432399f..61678cb0e6a1 100644 --- a/arch/powerpc/kernel/signal.c +++ b/arch/powerpc/kernel/signal.c @@ -247,7 +247,6 @@ static void do_signal(struct task_struct *tsk) sigset_t *oldset = sigmask_to_save(); struct ksignal ksig = { .sig = 0 }; int ret; - int is32 = is_32bit_task(); BUG_ON(tsk != current); @@ -277,7 +276,7 @@ static void do_signal(struct task_struct *tsk) rseq_signal_deliver(&ksig, tsk->thread.regs); - if (is32) { + if (is_32bit_task()) { if (ksig.ka.sa.sa_flags & SA_SIGINFO) ret = handle_rt_signal32(&ksig, oldset, tsk); else diff --git a/arch/powerpc/kernel/syscall_64.c b/arch/powerpc/kernel/syscall_64.c index 98ed970796d5..0d5cbbe54cf1 100644 --- a/arch/powerpc/kernel/syscall_64.c +++ b/arch/powerpc/kernel/syscall_64.c @@ -38,7 +38,6 @@ typedef long (*syscall_fn)(long, long, long, long, long, long); 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; BUG_ON(!(regs->msr & MSR_PR)); @@ -83,8 +82,7 @@ long
[PATCH v7 4/6] powerpc/64: make buildable without CONFIG_COMPAT
There are numerous references to 32bit functions in generic and 64bit code so ifdef them out. Signed-off-by: Michal Suchanek --- 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 --- arch/powerpc/include/asm/thread_info.h | 4 ++-- arch/powerpc/kernel/Makefile | 7 +++--- 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 | 5 ++--- arch/powerpc/perf/callchain.c | 31 +- 7 files changed, 27 insertions(+), 31 deletions(-) diff --git a/arch/powerpc/include/asm/thread_info.h b/arch/powerpc/include/asm/thread_info.h index 8e1d0195ac36..c128d8a48ea3 100644 --- a/arch/powerpc/include/asm/thread_info.h +++ b/arch/powerpc/include/asm/thread_info.h @@ -144,10 +144,10 @@ static inline bool test_thread_local_flags(unsigned int flags) return (ti->local_flags & flags) != 0; } -#ifdef CONFIG_PPC64 +#ifdef CONFIG_COMPAT #define is_32bit_task()(test_thread_flag(TIF_32BIT)) #else -#define is_32bit_task()(1) +#define is_32bit_task()(IS_ENABLED(CONFIG_PPC32)) #endif #if defined(CONFIG_PPC64) diff --git a/arch/powerpc/kernel/Makefile b/arch/powerpc/kernel/Makefile index 1d646a94d96c..9d8772e863b9 100644 --- a/arch/powerpc/kernel/Makefile +++ b/arch/powerpc/kernel/Makefile @@ -44,16 +44,15 @@ CFLAGS_btext.o += -DDISABLE_BRANCH_PROFILING endif obj-y := cputable.o ptrace.o syscalls.o \ - irq.o align.o signal_32.o pmc.o vdso.o \ + irq.o align.o signal_$(BITS).o pmc.o vdso.o \ process.o systbl.o idle.o \ signal.o sysfs.o cacheinfo.o time.o \ prom.o traps.o setup-common.o \ udbg.o misc.o io.o misc_$(BITS).o \ of_platform.o prom_parse.o -obj-$(CONFIG_PPC64)+= setup_64.o sys_ppc32.o \ - signal_64.o ptrace32.o \ - paca.o nvram_64.o firmware.o \ +obj-$(CONFIG_PPC64)+= setup_64.o paca.o nvram_64.o firmware.o \ syscall_64.o +obj-$(CONFIG_COMPAT) += sys_ppc32.o ptrace32.o signal_32.o obj-$(CONFIG_VDSO32) += vdso32/ obj-$(CONFIG_PPC_WATCHDOG) += watchdog.o obj-$(CONFIG_HAVE_HW_BREAKPOINT) += hw_breakpoint.o diff --git a/arch/powerpc/kernel/entry_64.S b/arch/powerpc/kernel/entry_64.S index 2ec825a85f5b..a2dbf216f607 100644 --- a/arch/powerpc/kernel/entry_64.S +++ b/arch/powerpc/kernel/entry_64.S @@ -51,8 +51,10 @@ SYS_CALL_TABLE: .tc sys_call_table[TC],sys_call_table +#ifdef CONFIG_COMPAT COMPAT_SYS_CALL_TABLE: .tc compat_sys_call_table[TC],compat_sys_call_table +#endif /* This value is used to mark exception frames on the stack. */ exception_marker: diff --git a/arch/powerpc/kernel/signal.c b/arch/powerpc/kernel/signal.c index 60436432399f..61678cb0e6a1 100644 --- a/arch/powerpc/kernel/signal.c +++ b/arch/powerpc/kernel/signal.c @@ -247,7 +247,6 @@ static void do_signal(struct task_struct *tsk) sigset_t *oldset = sigmask_to_save(); struct ksignal ksig = { .sig = 0 }; int ret; - int is32 = is_32bit_task(); BUG_ON(tsk != current); @@ -277,7 +276,7 @@ static void do_signal(struct task_struct *tsk) rseq_signal_deliver(&ksig, tsk->thread.regs); - if (is32) { + if (is_32bit_task()) { if (ksig.ka.sa.sa_flags & SA_SIGINFO) ret = handle_rt_signal32(&ksig, oldset, tsk); else diff --git a/arch/powerpc/kernel/syscall_64.c b/arch/powerpc/kernel/syscall_64.c index 98ed970796d5..0d5cbbe54cf1 100644 --- a/arch/powerpc/kernel/syscall_64.c +++ b/arch/powerpc/kernel/syscall_64.c @@ -38,7 +38,6 @@ typedef long (*syscall_fn)(long, long, long, long, long, long); 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; BUG_ON(!(regs->msr & MSR_PR)); @@ -83,8 +82,7 @@ long system_call_exception(long r3, long r4, long r5, long r6, long r7, long r8,