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charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org The 07/06/2022 18:52, Mark Brown wrote: > The top two bits of AT_HWCAP are reserved for use by glibc and the rest of > the top 32 bits are being kept unallocated for potential use by glibc. > Document this in the header. > > Signed-off-by: Mark Brown > --- > arch/arm64/include/uapi/asm/hwcap.h | 3 +++ > 1 file changed, 3 insertions(+) > > diff --git a/arch/arm64/include/uapi/asm/hwcap.h b/arch/arm64/include/uapi/asm/hwcap.h > index 4bb2cc8ac446..cc2ccd0a9edf 100644 > --- a/arch/arm64/include/uapi/asm/hwcap.h > +++ b/arch/arm64/include/uapi/asm/hwcap.h > @@ -19,6 +19,9 @@ > > /* > * HWCAP flags - for AT_HWCAP > + * > + * Bits 60 and 61 are reserved for use by libc. should be 62 and 63 > + * Bits 32-59 are unallocated for potential use by libc. 32-61 > */ > #define HWCAP_FP (1 << 0) > #define HWCAP_ASIMD (1 << 1) > -- > 2.30.2 > _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel