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| author | Mark Rutland <mark.rutland@arm.com> | 2020-12-02 13:15:51 +0000 |
|---|---|---|
| committer | Catalin Marinas <catalin.marinas@arm.com> | 2020-12-02 19:49:10 +0000 |
| commit | 9e94fdade4d8f3c9b64c302ba081e2718c9e4087 (patch) | |
| tree | c76d94f31c9d8c5926c32b22f41ad471903b8ee8 /arch/arm64/lib | |
| parent | 923e1e7d8223cfa6e67d00ad238ee415c3c59320 (diff) | |
| download | linux-9e94fdade4d8f3c9b64c302ba081e2718c9e4087.tar.bz2 | |
arm64: uaccess: simplify __copy_user_flushcache()
Currently __copy_user_flushcache() open-codes raw_copy_from_user(), and
doesn't use uaccess_mask_ptr() on the user address. Let's have it call
raw_copy_from_user(), which is both a simplification and ensures that
user pointers are masked under speculation.
There should be no functional change as a result of this patch.
Signed-off-by: Mark Rutland <mark.rutland@arm.com>
Reviewed-by: Robin Murphy <robin.murphy@arm.com>
Cc: Christoph Hellwig <hch@lst.de>
Cc: Will Deacon <will@kernel.org>
Link: https://lore.kernel.org/r/20201202131558.39270-6-mark.rutland@arm.com
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Diffstat (limited to 'arch/arm64/lib')
| -rw-r--r-- | arch/arm64/lib/uaccess_flushcache.c | 4 |
1 files changed, 1 insertions, 3 deletions
diff --git a/arch/arm64/lib/uaccess_flushcache.c b/arch/arm64/lib/uaccess_flushcache.c index bfa30b75b2b8..c83bb5a4aad2 100644 --- a/arch/arm64/lib/uaccess_flushcache.c +++ b/arch/arm64/lib/uaccess_flushcache.c @@ -30,9 +30,7 @@ unsigned long __copy_user_flushcache(void *to, const void __user *from, { unsigned long rc; - uaccess_enable_not_uao(); - rc = __arch_copy_from_user(to, from, n); - uaccess_disable_not_uao(); + rc = raw_copy_from_user(to, from, n); /* See above */ __clean_dcache_area_pop(to, n - rc); |