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UPSTREAM: maccess: remove various unused weak aliases

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maccess tends to define lots of underscore prefixed symbols that then
have other weak aliases.  But except for two cases they are never
actually used, so remove them.

Change-Id: Ia529e72bd40d80f1b17a4482a2f68ad56d3067f3
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Cc: Alexei Starovoitov <ast@kernel.org>
Cc: Daniel Borkmann <daniel@iogearbox.net>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Masami Hiramatsu <mhiramat@kernel.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: http://lkml.kernel.org/r/20200521152301.2587579-3-hch@lst.de
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Christoph Hellwig 2020-06-08 21:34:01 -07:00 • committed by basamaryan
commit 099101399d
No known key found for this signature in database
GPG key ID: 210D5384FB2A5885
2 changed files with 3 additions and 19 deletions
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3
include/linux/uaccess.h
View file

@ -328,7 +328,6 @@ extern long __probe_kernel_read(void *dst, const void *src, size_t size);
* happens, handle that and return -EFAULT.
*/
extern long probe_user_read(void *dst, const void __user *src, size_t size);
extern long __probe_user_read(void *dst, const void __user *src, size_t size);
/*
* probe_kernel_write(): safely attempt to write to a location
@ -340,7 +339,6 @@ extern long __probe_user_read(void *dst, const void __user *src, size_t size);
* happens, handle that and return -EFAULT.
*/
extern long notrace probe_kernel_write(void *dst, const void *src, size_t size);
extern long notrace __probe_kernel_write(void *dst, const void *src, size_t size);
/*
* probe_user_write(): safely attempt to write to a location in user space
@ -352,7 +350,6 @@ extern long notrace __probe_kernel_write(void *dst, const void *src, size_t size
* happens, handle that and return -EFAULT.
*/
extern long notrace probe_user_write(void __user *dst, const void *src, size_t size);
extern long notrace __probe_user_write(void __user *dst, const void *src, size_t size);
extern long strncpy_from_unsafe(char *dst, const void *unsafe_addr, long count);
long strncpy_from_kernel_nofault(char *dst, const void *unsafe_addr,

19
mm/maccess.c
View file

@ -86,11 +86,7 @@ EXPORT_SYMBOL_GPL(probe_kernel_read);
* Safely read from user address @src to the buffer at @dst. If a kernel fault
* happens, handle that and return -EFAULT.
*/
long __weak probe_user_read(void *dst, const void __user *src, size_t size)
__attribute__((alias("__probe_user_read")));
long __probe_user_read(void *dst, const void __user *src, size_t size)
long probe_user_read(void *dst, const void __user *src, size_t size)
{
long ret = -EFAULT;
mm_segment_t old_fs = get_fs();
@ -113,11 +109,7 @@ EXPORT_SYMBOL_GPL(probe_user_read);
* Safely write to address @dst from the buffer at @src. If a kernel fault
* happens, handle that and return -EFAULT.
*/
long __weak probe_kernel_write(void *dst, const void *src, size_t size)
__attribute__((alias("__probe_kernel_write")));
long __probe_kernel_write(void *dst, const void *src, size_t size)
long probe_kernel_write(void *dst, const void *src, size_t size)
{
long ret;
mm_segment_t old_fs = get_fs();
@ -139,11 +131,7 @@ EXPORT_SYMBOL_GPL(probe_kernel_write);
* Safely write to address @dst from the buffer at @src. If a kernel fault
* happens, handle that and return -EFAULT.
*/
long __weak probe_user_write(void __user *dst, const void *src, size_t size)
__attribute__((alias("__probe_user_write")));
long __probe_user_write(void __user *dst, const void *src, size_t size)
long probe_user_write(void __user *dst, const void *src, size_t size)
{
long ret = -EFAULT;
mm_segment_t old_fs = get_fs();
@ -181,7 +169,6 @@ EXPORT_SYMBOL_GPL(probe_user_write);
* DO NOT USE THIS FUNCTION - it is broken on architectures with entirely
* separate kernel and user address spaces, and also a bad idea otherwise.
*/
long __weak strncpy_from_unsafe(char *dst, const void *unsafe_addr, long count)
__attribute__((alias("__strncpy_from_unsafe")));