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arm64: mm: Really fix sparse warning in untagged_addr()

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untagged_addr() can be called with a '__user' pointer parameter and must
therefore use '__force' casts both when passing this parameter through
to sign_extend64() as a 'u64', but also when casting the 's64' return
value back to the '__user' pointer type.

Signed-off-by: Will Deacon <will@kernel.org>
This commit is contained in:
Will Deacon 2019-08-09 15:39:37 +01:00
parent 9ce1263033
commit 9c1cac424c
1 changed files with 1 additions and 1 deletions
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2
arch/arm64/include/asm/memory.h
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@ -201,7 +201,7 @@ extern u64 vabits_user;
* pass on to access_ok(), for instance.
*/
#define untagged_addr(addr) \
((__typeof__(addr))sign_extend64((__force u64)(addr), 55))
((__force __typeof__(addr))sign_extend64((__force u64)(addr), 55))
#ifdef CONFIG_KASAN_SW_TAGS
#define __tag_shifted(tag) ((u64)(tag) << 56)