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author | Linus Torvalds <torvalds@linux-foundation.org> | 2019-01-03 18:57:57 -0800 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2019-01-03 18:57:57 -0800 |
commit | 96d4f267e40f9509e8a66e2b39e8b95655617693 (patch) | |
tree | df03d142d405652392707b1b80c284d68d6ea6ab /arch/sparc/include/asm | |
parent | 135143b2cac43d2a1ec73b53033b9473fbbcce6d (diff) | |
download | linux-96d4f267e40f9509e8a66e2b39e8b95655617693.tar.bz2 |
Remove 'type' argument from access_ok() function
Nobody has actually used the type (VERIFY_READ vs VERIFY_WRITE) argument
of the user address range verification function since we got rid of the
old racy i386-only code to walk page tables by hand.
It existed because the original 80386 would not honor the write protect
bit when in kernel mode, so you had to do COW by hand before doing any
user access. But we haven't supported that in a long time, and these
days the 'type' argument is a purely historical artifact.
A discussion about extending 'user_access_begin()' to do the range
checking resulted this patch, because there is no way we're going to
move the old VERIFY_xyz interface to that model. And it's best done at
the end of the merge window when I've done most of my merges, so let's
just get this done once and for all.
This patch was mostly done with a sed-script, with manual fix-ups for
the cases that weren't of the trivial 'access_ok(VERIFY_xyz' form.
There were a couple of notable cases:
- csky still had the old "verify_area()" name as an alias.
- the iter_iov code had magical hardcoded knowledge of the actual
values of VERIFY_{READ,WRITE} (not that they mattered, since nothing
really used it)
- microblaze used the type argument for a debug printout
but other than those oddities this should be a total no-op patch.
I tried to fix up all architectures, did fairly extensive grepping for
access_ok() uses, and the changes are trivial, but I may have missed
something. Any missed conversion should be trivially fixable, though.
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'arch/sparc/include/asm')
-rw-r--r-- | arch/sparc/include/asm/checksum_32.h | 2 | ||||
-rw-r--r-- | arch/sparc/include/asm/uaccess_32.h | 2 | ||||
-rw-r--r-- | arch/sparc/include/asm/uaccess_64.h | 2 |
3 files changed, 3 insertions, 3 deletions
diff --git a/arch/sparc/include/asm/checksum_32.h b/arch/sparc/include/asm/checksum_32.h index d1e53d7aed39..5fc98d80b03b 100644 --- a/arch/sparc/include/asm/checksum_32.h +++ b/arch/sparc/include/asm/checksum_32.h @@ -87,7 +87,7 @@ static inline __wsum csum_partial_copy_to_user(const void *src, void __user *dst, int len, __wsum sum, int *err) { - if (!access_ok (VERIFY_WRITE, dst, len)) { + if (!access_ok(dst, len)) { *err = -EFAULT; return sum; } else { diff --git a/arch/sparc/include/asm/uaccess_32.h b/arch/sparc/include/asm/uaccess_32.h index de71c65b99f0..69afb856e181 100644 --- a/arch/sparc/include/asm/uaccess_32.h +++ b/arch/sparc/include/asm/uaccess_32.h @@ -39,7 +39,7 @@ #define __user_ok(addr, size) ({ (void)(size); (addr) < STACK_TOP; }) #define __kernel_ok (uaccess_kernel()) #define __access_ok(addr, size) (__user_ok((addr) & get_fs().seg, (size))) -#define access_ok(type, addr, size) \ +#define access_ok(addr, size) \ ({ (void)(type); __access_ok((unsigned long)(addr), size); }) /* diff --git a/arch/sparc/include/asm/uaccess_64.h b/arch/sparc/include/asm/uaccess_64.h index cbb308cee394..87ae9ffb1521 100644 --- a/arch/sparc/include/asm/uaccess_64.h +++ b/arch/sparc/include/asm/uaccess_64.h @@ -68,7 +68,7 @@ static inline int __access_ok(const void __user * addr, unsigned long size) return 1; } -static inline int access_ok(int type, const void __user * addr, unsigned long size) +static inline int access_ok(const void __user * addr, unsigned long size) { return 1; } |