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authorAl Viro <viro@zeniv.linux.org.uk>2020-02-18 14:19:54 -0500
committerAl Viro <viro@zeniv.linux.org.uk>2020-05-29 16:11:49 -0400
commit24f9aa928c3cc88bae573b39b6976844968f80a0 (patch)
treee4092ee465fb2be7f19930a9e36d2217852dc2b4 /arch
parent7fe8970a78a1934545d53267281f1737eefea3bb (diff)
arm: switch to csum_and_copy_from_user()
Note that csum_partial_copy_from_user() is in assembler here, so I'm leaving it alone and just providing the wrapper for it. When/if we go for switching arm to user_access_{begin,end}() (doing domain switches in those), somebody well need to look into that one. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'arch')
-rw-r--r--arch/arm/include/asm/checksum.h14
1 files changed, 14 insertions, 0 deletions
diff --git a/arch/arm/include/asm/checksum.h b/arch/arm/include/asm/checksum.h
index 20043e0ebb07..ed6073fee338 100644
--- a/arch/arm/include/asm/checksum.h
+++ b/arch/arm/include/asm/checksum.h
@@ -40,6 +40,20 @@ csum_partial_copy_nocheck(const void *src, void *dst, int len, __wsum sum);
__wsum
csum_partial_copy_from_user(const void __user *src, void *dst, int len, __wsum sum, int *err_ptr);
+#define _HAVE_ARCH_COPY_AND_CSUM_FROM_USER
+static inline
+__wsum csum_and_copy_from_user (const void __user *src, void *dst,
+ int len, __wsum sum, int *err_ptr)
+{
+ if (access_ok(src, len))
+ return csum_partial_copy_from_user(src, dst, len, sum, err_ptr);
+
+ if (len)
+ *err_ptr = -EFAULT;
+
+ return sum;
+}
+
/*
* Fold a partial checksum without adding pseudo headers
*/