From: Christoph Hellwig <hch@lst.de>
To: x86@kernel.org, Alexei Starovoitov <ast@kernel.org>,
Daniel Borkmann <daniel@iogearbox.net>,
Masami Hiramatsu <mhiramat@kernel.org>,
Linus Torvalds <torvalds@linux-foundation.org>,
Andrew Morton <akpm@linux-foundation.org>
Cc: linux-parisc@vger.kernel.org, linux-um@lists.infradead.org,
netdev@vger.kernel.org, bpf@vger.kernel.org, linux-mm@kvack.org,
linux-kernel@vger.kernel.org
Subject: [PATCH 02/18] maccess: remove various unused weak aliases
Date: Wed, 13 May 2020 18:00:22 +0200 [thread overview]
Message-ID: <20200513160038.2482415-3-hch@lst.de> (raw)
In-Reply-To: <20200513160038.2482415-1-hch@lst.de>
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.
Signed-off-by: Christoph Hellwig <hch@lst.de>
---
include/linux/uaccess.h | 3 ---
mm/maccess.c | 19 +++----------------
2 files changed, 3 insertions(+), 19 deletions(-)
diff --git a/include/linux/uaccess.h b/include/linux/uaccess.h
index 67f016010aad5..a2c606a403745 100644
--- a/include/linux/uaccess.h
+++ b/include/linux/uaccess.h
@@ -324,7 +324,6 @@ 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
@@ -336,7 +335,6 @@ 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
@@ -348,7 +346,6 @@ 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);
extern long strncpy_from_unsafe_strict(char *dst, const void *unsafe_addr,
diff --git a/mm/maccess.c b/mm/maccess.c
index cf21e604f78cb..4e7f3b6eb05ae 100644
--- a/mm/maccess.c
+++ b/mm/maccess.c
@@ -79,11 +79,7 @@ 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();
@@ -106,11 +102,7 @@ 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();
@@ -131,11 +123,7 @@ long __probe_kernel_write(void *dst, const void *src, size_t size)
* 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();
@@ -171,7 +159,6 @@ long __probe_user_write(void __user *dst, const void *src, size_t size)
* probing memory on a user address range where strncpy_from_unsafe_user() is
* supposed to be used instead.
*/
-
long __weak strncpy_from_unsafe(char *dst, const void *unsafe_addr, long count)
__attribute__((alias("__strncpy_from_unsafe")));
--
2.26.2
next prev parent reply other threads:[~2020-05-13 16:02 UTC|newest]
Thread overview: 46+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-05-13 16:00 clean up and streamline probe_kernel_* and friends v2 Christoph Hellwig
2020-05-13 16:00 ` [PATCH 01/18] maccess: unexport probe_kernel_write and probe_user_write Christoph Hellwig
2020-05-13 16:00 ` Christoph Hellwig [this message]
2020-05-13 16:00 ` [PATCH 03/18] maccess: remove duplicate kerneldoc comments Christoph Hellwig
2020-05-13 16:00 ` [PATCH 04/18] maccess: clarify " Christoph Hellwig
2020-05-13 16:00 ` [PATCH 05/18] maccess: update the top of file comment Christoph Hellwig
2020-05-13 16:00 ` [PATCH 06/18] maccess: rename strncpy_from_unsafe_user to strncpy_from_user_nofault Christoph Hellwig
2020-05-13 16:00 ` [PATCH 07/18] maccess: rename strncpy_from_unsafe_strict to strncpy_from_kernel_nofault Christoph Hellwig
2020-05-13 16:00 ` [PATCH 08/18] maccess: rename strnlen_unsafe_user to strnlen_user_nofault Christoph Hellwig
2020-05-13 16:00 ` [PATCH 09/18] maccess: remove probe_read_common and probe_write_common Christoph Hellwig
2020-05-13 16:00 ` [PATCH 10/18] maccess: unify the probe kernel arch hooks Christoph Hellwig
2020-05-14 1:13 ` Masami Hiramatsu
2020-05-19 5:46 ` Christoph Hellwig
2020-05-13 16:00 ` [PATCH 11/18] maccess: remove strncpy_from_unsafe Christoph Hellwig
2020-05-13 19:11 ` Linus Torvalds
2020-05-13 19:28 ` Christoph Hellwig
2020-05-13 22:36 ` Daniel Borkmann
2020-05-13 23:03 ` Linus Torvalds
2020-05-13 23:24 ` Daniel Borkmann
2020-05-13 23:20 ` Masami Hiramatsu
2020-05-13 23:59 ` Linus Torvalds
2020-05-14 1:00 ` Masami Hiramatsu
2020-05-14 2:43 ` Linus Torvalds
2020-05-14 9:44 ` Masami Hiramatsu
2020-05-14 10:27 ` Daniel Borkmann
2020-05-13 23:28 ` Al Viro
2020-05-13 23:58 ` Daniel Borkmann
2020-05-14 10:01 ` David Laight
2020-05-14 10:21 ` Daniel Borkmann
2020-05-13 16:00 ` [PATCH 12/18] maccess: always use strict semantics for probe_kernel_read Christoph Hellwig
2020-05-13 16:00 ` [PATCH 13/18] maccess: move user access routines together Christoph Hellwig
2020-05-13 16:00 ` [PATCH 14/18] maccess: allow architectures to provide kernel probing directly Christoph Hellwig
2020-05-13 19:36 ` Linus Torvalds
2020-05-13 19:40 ` Christoph Hellwig
2020-05-13 19:48 ` Linus Torvalds
2020-05-13 19:54 ` Christoph Hellwig
2020-05-16 3:42 ` Masami Hiramatsu
2020-05-18 15:09 ` Christoph Hellwig
2020-05-13 16:00 ` [PATCH 15/18] x86: use non-set_fs based maccess routines Christoph Hellwig
2020-05-13 16:00 ` [PATCH 16/18] maccess: rename probe_kernel_{read,write} to copy_{from,to}_kernel_nofault Christoph Hellwig
2020-05-13 16:00 ` [PATCH 17/18] maccess: rename probe_user_{read,write} to copy_{from,to}_user_nofault Christoph Hellwig
2020-05-13 16:00 ` [PATCH 18/18] maccess: rename probe_kernel_address to get_kernel_nofault Christoph Hellwig
2020-05-13 19:37 ` clean up and streamline probe_kernel_* and friends v2 Linus Torvalds
2020-05-13 23:04 ` Daniel Borkmann
2020-05-13 23:20 ` Linus Torvalds
2020-05-19 5:50 ` Christoph Hellwig
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20200513160038.2482415-3-hch@lst.de \
--to=hch@lst.de \
--cc=akpm@linux-foundation.org \
--cc=ast@kernel.org \
--cc=bpf@vger.kernel.org \
--cc=daniel@iogearbox.net \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-mm@kvack.org \
--cc=linux-parisc@vger.kernel.org \
--cc=linux-um@lists.infradead.org \
--cc=mhiramat@kernel.org \
--cc=netdev@vger.kernel.org \
--cc=torvalds@linux-foundation.org \
--cc=x86@kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).