]> git.ipfire.org Git - thirdparty/kernel/stable-queue.git/commitdiff
fixes for 5.1
authorSasha Levin <sashal@kernel.org>
Wed, 26 Jun 2019 03:39:23 +0000 (23:39 -0400)
committerSasha Levin <sashal@kernel.org>
Wed, 26 Jun 2019 03:39:23 +0000 (23:39 -0400)
Signed-off-by: Sasha Levin <sashal@kernel.org>
queue-5.1/revert-x86-uaccess-ftrace-fix-ftrace_likely_update-v.patch [new file with mode: 0644]
queue-5.1/series

diff --git a/queue-5.1/revert-x86-uaccess-ftrace-fix-ftrace_likely_update-v.patch b/queue-5.1/revert-x86-uaccess-ftrace-fix-ftrace_likely_update-v.patch
new file mode 100644 (file)
index 0000000..a0a3574
--- /dev/null
@@ -0,0 +1,45 @@
+From c2b81fef082a1f72720aa0f0d213572f51708abe Mon Sep 17 00:00:00 2001
+From: Sasha Levin <sashal@kernel.org>
+Date: Tue, 25 Jun 2019 07:36:40 -0400
+Subject: Revert "x86/uaccess, ftrace: Fix ftrace_likely_update() vs. SMAP"
+
+This reverts commit b65b70ba068b7cdbfeb65eee87cce84a74618603, which was
+upstream commit 4a6c91fbdef846ec7250b82f2eeeb87ac5f18cf9.
+
+On Tue, Jun 25, 2019 at 09:39:45AM +0200, Sebastian Andrzej Siewior wrote:
+>Please backport commit e74deb11931ff682b59d5b9d387f7115f689698e to
+>stable _or_ revert the backport of commit 4a6c91fbdef84 ("x86/uaccess,
+>ftrace: Fix ftrace_likely_update() vs. SMAP"). It uses
+>user_access_{save|restore}() which has been introduced in the following
+>commit.
+
+Signed-off-by: Sasha Levin <sashal@kernel.org>
+---
+ kernel/trace/trace_branch.c | 4 ----
+ 1 file changed, 4 deletions(-)
+
+diff --git a/kernel/trace/trace_branch.c b/kernel/trace/trace_branch.c
+index 3ea65cdff30d..4ad967453b6f 100644
+--- a/kernel/trace/trace_branch.c
++++ b/kernel/trace/trace_branch.c
+@@ -205,8 +205,6 @@ void trace_likely_condition(struct ftrace_likely_data *f, int val, int expect)
+ void ftrace_likely_update(struct ftrace_likely_data *f, int val,
+                         int expect, int is_constant)
+ {
+-      unsigned long flags = user_access_save();
+-
+       /* A constant is always correct */
+       if (is_constant) {
+               f->constant++;
+@@ -225,8 +223,6 @@ void ftrace_likely_update(struct ftrace_likely_data *f, int val,
+               f->data.correct++;
+       else
+               f->data.incorrect++;
+-
+-      user_access_restore(flags);
+ }
+ EXPORT_SYMBOL(ftrace_likely_update);
+-- 
+2.20.1
+
index 09a48bd90ef7f4724a859cfd01425fbea0e7fc47..4d22dced11915e4a3c2453358303412f21babf09 100644 (file)
@@ -1 +1,2 @@
 arm64-don-t-unconditionally-add-wno-psabi-to-kbuild_cflags.patch
+revert-x86-uaccess-ftrace-fix-ftrace_likely_update-v.patch