From: Christophe Leroy Date: Wed, 10 Mar 2021 17:57:00 +0000 (+0000) Subject: powerpc/uaccess: Also perform 64 bits copies in unsafe_copy_to_user() on ppc32 X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=c6adc835c68b713360f918d21372c2f34fc228e2;p=linux.git powerpc/uaccess: Also perform 64 bits copies in unsafe_copy_to_user() on ppc32 ppc32 has an efficiant 64 bits __put_user(), so also use it in order to unroll loops more. Signed-off-by: Christophe Leroy Signed-off-by: Michael Ellerman Link: https://lore.kernel.org/r/ccc08a16eea682d6fa4acc957ffe34003a8f0844.1615398498.git.christophe.leroy@csgroup.eu --- diff --git a/arch/powerpc/include/asm/uaccess.h b/arch/powerpc/include/asm/uaccess.h index 78e2a3990eab3..2c09cff205efb 100644 --- a/arch/powerpc/include/asm/uaccess.h +++ b/arch/powerpc/include/asm/uaccess.h @@ -494,9 +494,9 @@ do { \ size_t _len = (l); \ int _i; \ \ - for (_i = 0; _i < (_len & ~(sizeof(long) - 1)); _i += sizeof(long)) \ - unsafe_put_user(*(long*)(_src + _i), (long __user *)(_dst + _i), e); \ - if (IS_ENABLED(CONFIG_PPC64) && (_len & 4)) { \ + for (_i = 0; _i < (_len & ~(sizeof(u64) - 1)); _i += sizeof(u64)) \ + unsafe_put_user(*(u64 *)(_src + _i), (u64 __user *)(_dst + _i), e); \ + if (_len & 4) { \ unsafe_put_user(*(u32*)(_src + _i), (u32 __user *)(_dst + _i), e); \ _i += 4; \ } \