From: Tong Tiangen <tongtiangen@huawei.com>
To: Mark Rutland <mark.rutland@arm.com>,
James Morse <james.morse@arm.com>,
Andrew Morton <akpm@linux-foundation.org>,
Thomas Gleixner <tglx@linutronix.de>,
Ingo Molnar <mingo@redhat.com>, Borislav Petkov <bp@alien8.de>,
Robin Murphy <robin.murphy@arm.com>,
Dave Hansen <dave.hansen@linux.intel.com>,
Catalin Marinas <catalin.marinas@arm.com>,
Will Deacon <will@kernel.org>,
Alexander Viro <viro@zeniv.linux.org.uk>,
Michael Ellerman <mpe@ellerman.id.au>,
Benjamin Herrenschmidt <benh@kernel.crashing.org>,
Paul Mackerras <paulus@samba.org>, <x86@kernel.org>,
"H . Peter Anvin" <hpa@zytor.com>
Cc: <linuxppc-dev@lists.ozlabs.org>,
<linux-arm-kernel@lists.infradead.org>,
<linux-kernel@vger.kernel.org>, <linux-mm@kvack.org>,
Kefeng Wang <wangkefeng.wang@huawei.com>,
Xie XiuQi <xiexiuqi@huawei.com>, Guohanjun <guohanjun@huawei.com>,
Tong Tiangen <tongtiangen@huawei.com>
Subject: [PATCH -next v6 07/10] Add generic fallback version of copy_mc_to_user()
Date: Tue, 21 Jun 2022 07:26:35 +0000 [thread overview]
Message-ID: <20220621072638.1273594-8-tongtiangen@huawei.com> (raw)
In-Reply-To: <20220621072638.1273594-1-tongtiangen@huawei.com>
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 <tongtiangen@huawei.com>
Acked-by: Michael Ellerman <mpe@ellerman.id.au>
---
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 9b82b38ff867..58dbe8e2e318 100644
--- a/arch/powerpc/include/asm/uaccess.h
+++ b/arch/powerpc/include/asm/uaccess.h
@@ -358,6 +358,7 @@ 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 913e593a3b45..64ba7f723ddf 100644
--- a/arch/x86/include/asm/uaccess.h
+++ b/arch/x86/include/asm/uaccess.h
@@ -512,6 +512,7 @@ copy_mc_to_kernel(void *to, const void *from, unsigned len);
unsigned long __must_check
copy_mc_to_user(void *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 5a328cf02b75..07e9faeb14b5 100644
--- a/include/linux/uaccess.h
+++ b/include/linux/uaccess.h
@@ -174,6 +174,15 @@ 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++;
--
2.25.1
next prev parent reply other threads:[~2022-06-21 7:29 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-06-21 7:26 [PATCH -next v6 00/10]arm64: add machine check safe support Tong Tiangen
2022-06-21 7:26 ` [PATCH -next v6 01/10] arm64: extable: add new extable type EX_TYPE_KACCESS_ERR_ZERO support Tong Tiangen
2022-06-21 7:26 ` [PATCH -next v6 02/10] arm64: asm-extable: move data fields Tong Tiangen
2022-06-28 11:15 ` Will Deacon
2022-06-21 7:26 ` [PATCH -next v6 03/10] arm64: asm-extable: add asm uacess helpers Tong Tiangen
2022-06-21 7:26 ` [PATCH -next v6 04/10] arm64: extable: make uaaccess helper use extable type EX_TYPE_UACCESS_ERR_ZERO Tong Tiangen
2022-06-21 7:26 ` [PATCH -next v6 05/10] arm64: extable: move _cond_extable to _cond_uaccess_extable Tong Tiangen
2022-06-21 7:26 ` [PATCH -next v6 06/10] arm64: extable: cleanup redundant extable type EX_TYPE_FIXUP Tong Tiangen
2022-06-21 7:26 ` Tong Tiangen [this message]
2022-06-21 7:26 ` [PATCH -next v6 08/10] arm64: add support for machine check error safe Tong Tiangen
2022-06-21 7:26 ` [PATCH -next v6 09/10] arm64: add uaccess to machine check safe Tong Tiangen
2022-06-21 7:26 ` [PATCH -next v6 10/10] arm64: add cow " Tong Tiangen
2022-06-28 11:17 ` [PATCH -next v6 00/10]arm64: add machine check safe support Kefeng Wang
2022-06-28 12:30 ` Tong Tiangen
2022-06-28 17:02 ` Will Deacon
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