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authorLinus Torvalds <torvalds@linux-foundation.org>2018-01-31 13:02:18 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2018-01-31 13:02:18 -0800
commite1c70f32386c4984ed8ca1a7aedb9bbff9ed3414 (patch)
tree09a9092c1ea56b1d9c218a77b2510036b509f225 /samples
parent183b6366cf473ff0e706a6751adc082faa44843d (diff)
parentd05b695c25bf0d704c74e0e1375de893531b9424 (diff)
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/livepatching
Pull livepatching updates from Jiri Kosina: - handle 'infinitely'-long sleeping tasks, from Miroslav Benes - remove 'immediate' feature, as it turns out it doesn't provide the originally expected semantics, and brings more issues than value * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/livepatching: livepatch: add locking to force and signal functions livepatch: Remove immediate feature livepatch: force transition to finish livepatch: send a fake signal to all blocking tasks
Diffstat (limited to 'samples')
-rw-r--r--samples/livepatch/livepatch-callbacks-demo.c15
-rw-r--r--samples/livepatch/livepatch-sample.c15
-rw-r--r--samples/livepatch/livepatch-shadow-fix1.c15
-rw-r--r--samples/livepatch/livepatch-shadow-fix2.c15
4 files changed, 0 insertions, 60 deletions
diff --git a/samples/livepatch/livepatch-callbacks-demo.c b/samples/livepatch/livepatch-callbacks-demo.c
index 3d115bd68442..72f9e6d1387b 100644
--- a/samples/livepatch/livepatch-callbacks-demo.c
+++ b/samples/livepatch/livepatch-callbacks-demo.c
@@ -197,21 +197,6 @@ static int livepatch_callbacks_demo_init(void)
{
int ret;
- if (!klp_have_reliable_stack() && !patch.immediate) {
- /*
- * WARNING: Be very careful when using 'patch.immediate' in
- * your patches. It's ok to use it for simple patches like
- * this, but for more complex patches which change function
- * semantics, locking semantics, or data structures, it may not
- * be safe. Use of this option will also prevent removal of
- * the patch.
- *
- * See Documentation/livepatch/livepatch.txt for more details.
- */
- patch.immediate = true;
- pr_notice("The consistency model isn't supported for your architecture. Bypassing safety mechanisms and applying the patch immediately.\n");
- }
-
ret = klp_register_patch(&patch);
if (ret)
return ret;
diff --git a/samples/livepatch/livepatch-sample.c b/samples/livepatch/livepatch-sample.c
index 84795223f15f..2d554dd930e2 100644
--- a/samples/livepatch/livepatch-sample.c
+++ b/samples/livepatch/livepatch-sample.c
@@ -71,21 +71,6 @@ static int livepatch_init(void)
{
int ret;
- if (!klp_have_reliable_stack() && !patch.immediate) {
- /*
- * WARNING: Be very careful when using 'patch.immediate' in
- * your patches. It's ok to use it for simple patches like
- * this, but for more complex patches which change function
- * semantics, locking semantics, or data structures, it may not
- * be safe. Use of this option will also prevent removal of
- * the patch.
- *
- * See Documentation/livepatch/livepatch.txt for more details.
- */
- patch.immediate = true;
- pr_notice("The consistency model isn't supported for your architecture. Bypassing safety mechanisms and applying the patch immediately.\n");
- }
-
ret = klp_register_patch(&patch);
if (ret)
return ret;
diff --git a/samples/livepatch/livepatch-shadow-fix1.c b/samples/livepatch/livepatch-shadow-fix1.c
index fbe0a1f3d99b..830c55514f9f 100644
--- a/samples/livepatch/livepatch-shadow-fix1.c
+++ b/samples/livepatch/livepatch-shadow-fix1.c
@@ -133,21 +133,6 @@ static int livepatch_shadow_fix1_init(void)
{
int ret;
- if (!klp_have_reliable_stack() && !patch.immediate) {
- /*
- * WARNING: Be very careful when using 'patch.immediate' in
- * your patches. It's ok to use it for simple patches like
- * this, but for more complex patches which change function
- * semantics, locking semantics, or data structures, it may not
- * be safe. Use of this option will also prevent removal of
- * the patch.
- *
- * See Documentation/livepatch/livepatch.txt for more details.
- */
- patch.immediate = true;
- pr_notice("The consistency model isn't supported for your architecture. Bypassing safety mechanisms and applying the patch immediately.\n");
- }
-
ret = klp_register_patch(&patch);
if (ret)
return ret;
diff --git a/samples/livepatch/livepatch-shadow-fix2.c b/samples/livepatch/livepatch-shadow-fix2.c
index 53c1794bdc5f..ff9948f0ec00 100644
--- a/samples/livepatch/livepatch-shadow-fix2.c
+++ b/samples/livepatch/livepatch-shadow-fix2.c
@@ -128,21 +128,6 @@ static int livepatch_shadow_fix2_init(void)
{
int ret;
- if (!klp_have_reliable_stack() && !patch.immediate) {
- /*
- * WARNING: Be very careful when using 'patch.immediate' in
- * your patches. It's ok to use it for simple patches like
- * this, but for more complex patches which change function
- * semantics, locking semantics, or data structures, it may not
- * be safe. Use of this option will also prevent removal of
- * the patch.
- *
- * See Documentation/livepatch/livepatch.txt for more details.
- */
- patch.immediate = true;
- pr_notice("The consistency model isn't supported for your architecture. Bypassing safety mechanisms and applying the patch immediately.\n");
- }
-
ret = klp_register_patch(&patch);
if (ret)
return ret;