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Peter Anvin" CC: , , , , , Tong Tiangen , , Guohanjun Subject: [PATCH v10 1/6] uaccess: add generic fallback version of copy_mc_to_user() Date: Mon, 29 Jan 2024 21:46:47 +0800 Message-ID: <20240129134652.4004931-2-tongtiangen@huawei.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20240129134652.4004931-1-tongtiangen@huawei.com> References: <20240129134652.4004931-1-tongtiangen@huawei.com> MIME-Version: 1.0 X-Originating-IP: [10.175.112.125] X-ClientProxiedBy: dggems701-chm.china.huawei.com (10.3.19.178) To kwepemm600017.china.huawei.com (7.193.23.234) X-Rspamd-Queue-Id: 69ED440019 X-Rspam-User: X-Stat-Signature: 4tdoiaud5wxk4yjsrfj3hhcakeip7p74 X-Rspamd-Server: rspam01 X-HE-Tag: 1706536023-913529 X-HE-Meta: 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 8PC3MtiL 06gg9QhZ1RGhVhw0uxBtVVJrfE20E6jCLw49/HbG1bnNxzq39AP4TkdjyTKhRsXC8fFFRkHX40mc5m3idDURU2Td8dKR8ksgZ07xFm+yZI6ck3Rgfe0xChV0iL8nPdIxQ2PmrqdYaTNJw0YsKowf4AyJfBlIqGgEpicjXloNDlJ7mCaTas7SKv4fLKlV8YGUcmiCVmji1nJJW8yCEc4OuQvPBmaB2I8WSmNToDBg3KRVQtPmaNo78JjZHEgcZvOWRe4EVWOOl5NIs68k= X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: x86/powerpc has it's implementation of copy_mc_to_user(), we add generic fallback in include/linux/uaccess.h prepare for other architechures to enable CONFIG_ARCH_HAS_COPY_MC. Signed-off-by: Tong Tiangen Acked-by: Michael Ellerman --- arch/powerpc/include/asm/uaccess.h | 1 + arch/x86/include/asm/uaccess.h | 1 + include/linux/uaccess.h | 9 +++++++++ 3 files changed, 11 insertions(+) diff --git a/arch/powerpc/include/asm/uaccess.h b/arch/powerpc/include/asm/uaccess.h index f1f9890f50d3..4bfd1e6f0702 100644 --- a/arch/powerpc/include/asm/uaccess.h +++ b/arch/powerpc/include/asm/uaccess.h @@ -381,6 +381,7 @@ copy_mc_to_user(void __user *to, const void *from, unsigned long n) return n; } +#define copy_mc_to_user copy_mc_to_user #endif extern long __copy_from_user_flushcache(void *dst, const void __user *src, diff --git a/arch/x86/include/asm/uaccess.h b/arch/x86/include/asm/uaccess.h index 5c367c1290c3..fd56282ee9a8 100644 --- a/arch/x86/include/asm/uaccess.h +++ b/arch/x86/include/asm/uaccess.h @@ -497,6 +497,7 @@ copy_mc_to_kernel(void *to, const void *from, unsigned len); unsigned long __must_check copy_mc_to_user(void __user *to, const void *from, unsigned len); +#define copy_mc_to_user copy_mc_to_user #endif /* diff --git a/include/linux/uaccess.h b/include/linux/uaccess.h index 3064314f4832..550287c92990 100644 --- a/include/linux/uaccess.h +++ b/include/linux/uaccess.h @@ -205,6 +205,15 @@ copy_mc_to_kernel(void *dst, const void *src, size_t cnt) } #endif +#ifndef copy_mc_to_user +static inline unsigned long __must_check +copy_mc_to_user(void *dst, const void *src, size_t cnt) +{ + check_object_size(src, cnt, true); + return raw_copy_to_user(dst, src, cnt); +} +#endif + static __always_inline void pagefault_disabled_inc(void) { current->pagefault_disabled++;