lkml.org 
[lkml]   [2020]   [Jun]   [29]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH 41/41] regset: kill user_regset_copyout{,_zero}()
Date
From: Al Viro <viro@zeniv.linux.org.uk>

no callers left

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
---
include/linux/regset.h | 67 --------------------------------------------------
1 file changed, 67 deletions(-)

diff --git a/include/linux/regset.h b/include/linux/regset.h
index d82bb32e434c..facfaf300b44 100644
--- a/include/linux/regset.h
+++ b/include/linux/regset.h
@@ -238,44 +238,6 @@ struct user_regset_view {
*/
const struct user_regset_view *task_user_regset_view(struct task_struct *tsk);

-
-/*
- * These are helpers for writing regset get/set functions in arch code.
- * Because @start_pos and @end_pos are always compile-time constants,
- * these are inlined into very little code though they look large.
- *
- * Use one or more calls sequentially for each chunk of regset data stored
- * contiguously in memory. Call with constants for @start_pos and @end_pos,
- * giving the range of byte positions in the regset that data corresponds
- * to; @end_pos can be -1 if this chunk is at the end of the regset layout.
- * Each call updates the arguments to point past its chunk.
- */
-
-static inline int user_regset_copyout(unsigned int *pos, unsigned int *count,
- void **kbuf,
- void __user **ubuf, const void *data,
- const int start_pos, const int end_pos)
-{
- if (*count == 0)
- return 0;
- BUG_ON(*pos < start_pos);
- if (end_pos < 0 || *pos < end_pos) {
- unsigned int copy = (end_pos < 0 ? *count
- : min(*count, end_pos - *pos));
- data += *pos - start_pos;
- if (*kbuf) {
- memcpy(*kbuf, data, copy);
- *kbuf += copy;
- } else if (__copy_to_user(*ubuf, data, copy))
- return -EFAULT;
- else
- *ubuf += copy;
- *pos += copy;
- *count -= copy;
- }
- return 0;
-}
-
static inline int user_regset_copyin(unsigned int *pos, unsigned int *count,
const void **kbuf,
const void __user **ubuf, void *data,
@@ -301,35 +263,6 @@ static inline int user_regset_copyin(unsigned int *pos, unsigned int *count,
return 0;
}

-/*
- * These two parallel the two above, but for portions of a regset layout
- * that always read as all-zero or for which writes are ignored.
- */
-static inline int user_regset_copyout_zero(unsigned int *pos,
- unsigned int *count,
- void **kbuf, void __user **ubuf,
- const int start_pos,
- const int end_pos)
-{
- if (*count == 0)
- return 0;
- BUG_ON(*pos < start_pos);
- if (end_pos < 0 || *pos < end_pos) {
- unsigned int copy = (end_pos < 0 ? *count
- : min(*count, end_pos - *pos));
- if (*kbuf) {
- memset(*kbuf, 0, copy);
- *kbuf += copy;
- } else if (clear_user(*ubuf, copy))
- return -EFAULT;
- else
- *ubuf += copy;
- *pos += copy;
- *count -= copy;
- }
- return 0;
-}
-
static inline int user_regset_copyin_ignore(unsigned int *pos,
unsigned int *count,
const void **kbuf,
--
2.11.0
\
 
 \ /
  Last update: 2020-06-29 20:47    [W:0.320 / U:3.932 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site