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| author | Sasha Levin <sashal@kernel.org> | 2019-06-25 07:36:40 -0400 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2019-07-03 13:15:57 +0200 |
| commit | a8a53c768424dc225da5dd9d9b01615fa91a25af (patch) | |
| tree | 378a252201fc09429ee17b6c2e533d63d8c3624a /kernel/trace | |
| parent | 2a2e3b98fc00d4a1b0231173cf33b553e848895f (diff) | |
Revert "x86/uaccess, ftrace: Fix ftrace_likely_update() vs. SMAP"
This reverts commit 8190d6fbb1e9b7fa4eb41fe7aa337c46ca514e79, 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>
Diffstat (limited to 'kernel/trace')
| -rw-r--r-- | kernel/trace/trace_branch.c | 4 |
1 files changed, 0 insertions, 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); |