From 24f9aa928c3cc88bae573b39b6976844968f80a0 Mon Sep 17 00:00:00 2001 From: Al Viro Date: Tue, 18 Feb 2020 14:19:54 -0500 Subject: 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 --- arch/arm/include/asm/checksum.h | 14 ++++++++++++++ 1 file changed, 14 insertions(+) (limited to 'arch/arm/include/asm/checksum.h') 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 */ -- cgit v1.2.3