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| author | Al Viro <viro@zeniv.linux.org.uk> | 2020-02-18 21:01:02 +0300 |
|---|---|---|
| committer | Al Viro <viro@zeniv.linux.org.uk> | 2020-05-29 23:11:49 +0300 |
| commit | 77a8710ba7ef7ffcb71f0618bddf78c1b04f01d3 (patch) | |
| tree | da070d513882510df04191e3c3bda35473fcd328 /arch/parisc/lib/checksum.c | |
| parent | 808b49da54e640cba5c5c92dee658018a529226b (diff) | |
| download | linux-77a8710ba7ef7ffcb71f0618bddf78c1b04f01d3.tar.xz | |
parisc: turn csum_partial_copy_from_user() into csum_and_copy_from_user()
Already has the right semantics. Incidentally. failing copy_from_user()
zeroes the tail of destination - no need to repeat that manually
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'arch/parisc/lib/checksum.c')
| -rw-r--r-- | arch/parisc/lib/checksum.c | 12 |
1 files changed, 3 insertions, 9 deletions
diff --git a/arch/parisc/lib/checksum.c b/arch/parisc/lib/checksum.c index 256322c7b648..4e47c2ff2bcd 100644 --- a/arch/parisc/lib/checksum.c +++ b/arch/parisc/lib/checksum.c @@ -128,18 +128,12 @@ EXPORT_SYMBOL(csum_partial_copy_nocheck); * Copy from userspace and compute checksum. If we catch an exception * then zero the rest of the buffer. */ -__wsum csum_partial_copy_from_user(const void __user *src, +__wsum csum_and_copy_from_user(const void __user *src, void *dst, int len, __wsum sum, int *err_ptr) { - int missing; - - missing = copy_from_user(dst, src, len); - if (missing) { - memset(dst + len - missing, 0, missing); + if (copy_from_user(dst, src, len)) *err_ptr = -EFAULT; - } - return csum_partial(dst, len, sum); } -EXPORT_SYMBOL(csum_partial_copy_from_user); +EXPORT_SYMBOL(csum_and_copy_from_user); |