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| author |   Al Viro <viro@zeniv.linux.org.uk> | 2020-02-17 12:25:14 -0500 |
|---|---|---|
| committer | Al Viro <viro@zeniv.linux.org.uk> | 2020-07-27 14:31:07 -0400 |
| commit | dc12d7968f9c9540494deb1285854b18ca4465ec (patch) | |
| tree | 5d62016a11db4117707189853899ee466b5bcafb /include/linux/regset.h | |
| parent | Merge branches 'regset.x86', 'regset.ia64', 'regset.sparc' and 'regset.arm64' into work.regset (diff) | |
| download | linux-dev-dc12d7968f9c9540494deb1285854b18ca4465ec.tar.xz linux-dev-dc12d7968f9c9540494deb1285854b18ca4465ec.zip | |
copy_regset_to_user(): do all copyout at once.
Turn copy_regset_to_user() into regset_get_alloc() + copy_to_user().
Now all ->get() calls have a kernel buffer as destination.
Note that we'd already eliminated the callers of copy_regset_to_user()
with non-zero offset; now that argument is simply unused.
Uninlined, while we are at it.
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'include/linux/regset.h')
| -rw-r--r-- | include/linux/regset.h | 29 |
1 files changed, 4 insertions, 25 deletions
diff --git a/include/linux/regset.h b/include/linux/regset.h index 968a032922d5..af57c1db1924 100644 --- a/include/linux/regset.h +++ b/include/linux/regset.h @@ -362,31 +362,10 @@ extern int regset_get_alloc(struct task_struct *target, unsigned int size, void **data); -/** - * copy_regset_to_user - fetch a thread's user_regset data into user memory - * @target: thread to be examined - * @view: &struct user_regset_view describing user thread machine state - * @setno: index in @view->regsets - * @offset: offset into the regset data, in bytes - * @size: amount of data to copy, in bytes - * @data: user-mode pointer to copy into - */ -static inline int copy_regset_to_user(struct task_struct *target, - const struct user_regset_view *view, - unsigned int setno, - unsigned int offset, unsigned int size, - void __user *data) -{ - const struct user_regset *regset = &view->regsets[setno]; - - if (!regset->get) - return -EOPNOTSUPP; - - if (!access_ok(data, size)) - return -EFAULT; - - return regset->get(target, regset, offset, size, NULL, data); -} +extern int copy_regset_to_user(struct task_struct *target, + const struct user_regset_view *view, + unsigned int setno, unsigned int offset, + unsigned int size, void __user *data); /** * copy_regset_from_user - store into thread's user_regset data from user memory |