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Revert "x86/uaccess, ftrace: Fix ftrace_likely_update() vs. SMAP"

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This reverts commit 8190d6fbb1, which was
upstream commit 4a6c91fbde.

On Tue, Jun 25, 2019 at 09:39:45AM +0200, Sebastian Andrzej Siewior wrote:
>Please backport commit e74deb1193 to
>stable _or_ revert the backport of commit 4a6c91fbde ("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>
This commit is contained in:
Sasha Levin
2019-06-25 07:36:40 -04:00
committed by Greg Kroah-Hartman
parent 2a2e3b98fc
commit a8a53c7684
1 changed files with 0 additions and 4 deletions
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4
kernel/trace/trace_branch.c
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@@ -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);