On Wed, Nov 27, 2019 at 06:41:09AM +0100, Christophe Leroy wrote: > > > Le 26/11/2019 à 21:13, Michal Suchanek a écrit : > > Since commit ed1cd6deb013 ("powerpc: Activate CONFIG_THREAD_INFO_IN_TASK") > > current_is_64bit() is quivalent to !is_32bit_task(). > > Remove the redundant function. > > > > Link: https://github.com/linuxppc/issues/issues/275 > > Link: https://lkml.org/lkml/2019/9/12/540 > > > > Fixes: linuxppc#275 > > Suggested-by: Christophe Leroy <christophe.le...@c-s.fr> > > Signed-off-by: Michal Suchanek <msucha...@suse.de> > > This change is already in powerpc/next, see > https://github.com/linuxppc/linux/commit/42484d2c0f82b666292faf6668c77b49a3a04bc0
Right, needs rebase. Thanks Michal > > Christophe > > > --- > > arch/powerpc/perf/callchain.c | 17 +---------------- > > 1 file changed, 1 insertion(+), 16 deletions(-) > > > > diff --git a/arch/powerpc/perf/callchain.c b/arch/powerpc/perf/callchain.c > > index c84bbd4298a0..35d542515faf 100644 > > --- a/arch/powerpc/perf/callchain.c > > +++ b/arch/powerpc/perf/callchain.c > > @@ -284,16 +284,6 @@ static void perf_callchain_user_64(struct > > perf_callchain_entry_ctx *entry, > > } > > } > > -static inline int current_is_64bit(void) > > -{ > > - /* > > - * We can't use test_thread_flag() here because we may be on an > > - * interrupt stack, and the thread flags don't get copied over > > - * from the thread_info on the main stack to the interrupt stack. > > - */ > > - return !test_ti_thread_flag(task_thread_info(current), TIF_32BIT); > > -} > > - > > #else /* CONFIG_PPC64 */ > > /* > > * On 32-bit we just access the address and let hash_page create a > > @@ -321,11 +311,6 @@ static inline void perf_callchain_user_64(struct > > perf_callchain_entry_ctx *entry > > { > > } > > -static inline int current_is_64bit(void) > > -{ > > - return 0; > > -} > > - > > static inline int valid_user_sp(unsigned long sp, int is_64) > > { > > if (!sp || (sp & 7) || sp > TASK_SIZE - 32) > > @@ -486,7 +471,7 @@ static void perf_callchain_user_32(struct > > perf_callchain_entry_ctx *entry, > > void > > perf_callchain_user(struct perf_callchain_entry_ctx *entry, struct > > pt_regs *regs) > > { > > - if (current_is_64bit()) > > + if (!is_32bit_task()) > > perf_callchain_user_64(entry, regs); > > else > > perf_callchain_user_32(entry, regs); > >