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authorLinus Torvalds <torvalds@linux-foundation.org>2014-04-02 12:51:41 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2014-04-02 12:51:41 -0700
commit7125764c5d1a5c72d522f1011b6cc8b8100b48fe (patch)
tree678f3355ac872a4379b28dbe36f5beddd0e284d8 /include/linux/compat.h
parentc6f21243ce1e8d81ad8361da4d2eaa5947b667c4 (diff)
parentdce44e03b0a3448ad11ac6c6e0cbe299e0400791 (diff)
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Merge branch 'x86-x32-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull compat time conversion changes from Peter Anvin: "Despite the branch name this is really neither an x86 nor an x32-specific patchset, although it the implementation of the discussions that followed the x32 security hole a few months ago. This removes get/put_compat_timespec/val() and replaces them with compat_get/put_timespec/val() which are savvy as to the current status of COMPAT_USE_64BIT_TIME. It removes several unused and/or incorrect/misleading functions (like compat_put_timeval_convert which doesn't in fact do any conversion) and also replaces several open-coded implementations what is now called compat_convert_timespec() with that function" * 'x86-x32-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: compat: Fix sparse address space warnings compat: Get rid of (get|put)_compat_time(val|spec)
Diffstat (limited to 'include/linux/compat.h')
-rw-r--r--include/linux/compat.h23
1 files changed, 10 insertions, 13 deletions
diff --git a/include/linux/compat.h b/include/linux/compat.h
index 01c0aa57ccec..e6494261eaff 100644
--- a/include/linux/compat.h
+++ b/include/linux/compat.h
@@ -147,26 +147,23 @@ struct compat_sigaction {
};
/*
- * These functions operate strictly on struct compat_time*
- */
-extern int get_compat_timespec(struct timespec *,
- const struct compat_timespec __user *);
-extern int put_compat_timespec(const struct timespec *,
- struct compat_timespec __user *);
-extern int get_compat_timeval(struct timeval *,
- const struct compat_timeval __user *);
-extern int put_compat_timeval(const struct timeval *,
- struct compat_timeval __user *);
-/*
* These functions operate on 32- or 64-bit specs depending on
- * COMPAT_USE_64BIT_TIME, hence the void user pointer arguments and the
- * naming as compat_get/put_ rather than get/put_compat_.
+ * COMPAT_USE_64BIT_TIME, hence the void user pointer arguments.
*/
extern int compat_get_timespec(struct timespec *, const void __user *);
extern int compat_put_timespec(const struct timespec *, void __user *);
extern int compat_get_timeval(struct timeval *, const void __user *);
extern int compat_put_timeval(const struct timeval *, void __user *);
+/*
+ * This function convert a timespec if necessary and returns a *user
+ * space* pointer. If no conversion is necessary, it returns the
+ * initial pointer. NULL is a legitimate argument and will always
+ * output NULL.
+ */
+extern int compat_convert_timespec(struct timespec __user **,
+ const void __user *);
+
struct compat_iovec {
compat_uptr_t iov_base;
compat_size_t iov_len;