Re: [patch 33/38] powerpc: Select ARCH_HAS_RANDOM_ENTROPY
Mukesh Kumar Chaurasiya <[email protected]>
| Newsgroups | gmane.linux.ports.alpha,gmane.linux.kernel,gmane.linux.ports.ppc64.devel,gmane.linux.network,gmane.linux.kernel.wireless.general,gmane.linux.kernel.cryptoapi,gmane.linux.kernel.mm,gmane.comp.file-systems.ext4,gmane.linux.hams,gmane.linux.ports.arm.kernel,gmane.linux.ports.parisc,gmane.linux.ports.riscv,gmane.linux.ports.sparc |
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| Message-ID | <[email protected]> |
On Fri, Apr 10, 2026 at 02:21:09PM +0200, Thomas Gleixner wrote: > The only remaining usage of get_cycles() is to provide random_get_entropy(). > > Switch powerpc over to the new scheme of selecting ARCH_HAS_RANDOM_ENTROPY > and providing random_get_entropy() in asm/random.h. > > Remove asm/timex.h as it has no functionality anymore. > > Signed-off-by: Thomas Gleixner <[email protected]> > Cc: Michael Ellerman <[email protected]> > Cc: [email protected] > --- > arch/powerpc/Kconfig | 1 + > arch/powerpc/include/asm/random.h | 13 +++++++++++++ > arch/powerpc/include/asm/timex.h | 21 --------------------- > 3 files changed, 14 insertions(+), 21 deletions(-) > > --- a/arch/powerpc/Kconfig > +++ b/arch/powerpc/Kconfig > @@ -150,6 +150,7 @@ config PPC > select ARCH_HAS_PREEMPT_LAZY > select ARCH_HAS_PTDUMP > select ARCH_HAS_PTE_SPECIAL > + select ARCH_HAS_RANDOM_ENTROPY > select ARCH_HAS_SCALED_CPUTIME if VIRT_CPU_ACCOUNTING_NATIVE && PPC_BOOK3S_64 > select ARCH_HAS_SET_MEMORY > select ARCH_HAS_STRICT_KERNEL_RWX if (PPC_BOOK3S || PPC_8xx) && !HIBERNATION > --- /dev/null > +++ b/arch/powerpc/include/asm/random.h > @@ -0,0 +1,13 @@ > +/* SPDX-License-Identifier: GPL-2.0 */ > +#ifndef _ASM_POWERPC_RANDOM_H > +#define _ASM_POWERPC_RANDOM_H > + > +#include <asm/cputable.h> > +#include <asm/vdso/timebase.h> > + > +static inline unsigned long random_get_entropy(void) > +{ > + return mftb(); > +} > + > +#endif /* _ASM_POWERPC_RANDOM_H */ > --- a/arch/powerpc/include/asm/timex.h > +++ b/arch/powerpc/include/asm/timex.h > @@ -1,21 +0,0 @@ > -/* SPDX-License-Identifier: GPL-2.0 */ > -#ifndef _ASM_POWERPC_TIMEX_H > -#define _ASM_POWERPC_TIMEX_H > - > -#ifdef __KERNEL__ > - > -/* > - * PowerPC architecture timex specifications > - */ > - > -#include <asm/cputable.h> > -#include <asm/vdso/timebase.h> > - > -ostatic inline cycles_t get_cycles(void) > -{ R> - return mftb(); > -} > -#define get_cycles get_cycles > - > -#endif /* __KERNEL__ */ > -#endif /* _ASM_POWERPC_TIMEX_H */ > Build tested for this series with allmodconfig and allyesconfig on ppc64le machine for ppc64le. tree: git://git.kernel.org/pub/scm/linux/kernel/git/tglx/devel.git getcycles-v1 Boot tested for this series on powernv9 qemu, powernv10 qemu and pSeries power11 hardware. Tested-by: Mukesh Kumar Chaurasiya (IBM) <[email protected]> Reviewed-by: Mukesh Kumar Chaurasiya (IBM) <[email protected]>