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authorDaniel Vetter <daniel.vetter@ffwll.ch>2016-02-12 14:24:37 +0100
committerDaniel Vetter <daniel.vetter@ffwll.ch>2016-02-12 14:24:37 +0100
commit05fd934ba585ea8c9f129f15f11327adb1f96fe3 (patch)
tree7b678c512c43419ccf484e71c84d69caee84a6da /include/linux/livepatch.h
parentebb7c78d358b2ea45c7d997423e6feb42e5ce4ef (diff)
parent382ab95d1af85381d8a5dff09b16a80c7e492534 (diff)
Merge tag 'topic/drm-misc-2016-02-12' into drm-intel-next-queued
Backmerge to get at the new encoder_mask support in atomic helpers. Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
Diffstat (limited to 'include/linux/livepatch.h')
-rw-r--r--include/linux/livepatch.h24
1 files changed, 12 insertions, 12 deletions
diff --git a/include/linux/livepatch.h b/include/linux/livepatch.h
index 31db7a05dd36..a8828652f794 100644
--- a/include/linux/livepatch.h
+++ b/include/linux/livepatch.h
@@ -37,8 +37,9 @@ enum klp_state {
* struct klp_func - function structure for live patching
* @old_name: name of the function to be patched
* @new_func: pointer to the patched function code
- * @old_addr: a hint conveying at what address the old function
- * can be found (optional, vmlinux patches only)
+ * @old_sympos: a hint indicating which symbol position the old function
+ * can be found (optional)
+ * @old_addr: the address of the function being patched
* @kobj: kobject for sysfs resources
* @state: tracks function-level patch application state
* @stack_node: list node for klp_ops func_stack list
@@ -48,16 +49,16 @@ struct klp_func {
const char *old_name;
void *new_func;
/*
- * The old_addr field is optional and can be used to resolve
- * duplicate symbol names in the vmlinux object. If this
- * information is not present, the symbol is located by name
- * with kallsyms. If the name is not unique and old_addr is
- * not provided, the patch application fails as there is no
- * way to resolve the ambiguity.
+ * The old_sympos field is optional and can be used to resolve
+ * duplicate symbol names in livepatch objects. If this field is zero,
+ * it is expected the symbol is unique, otherwise patching fails. If
+ * this value is greater than zero then that occurrence of the symbol
+ * in kallsyms for the given object is used.
*/
- unsigned long old_addr;
+ unsigned long old_sympos;
/* internal */
+ unsigned long old_addr;
struct kobject kobj;
enum klp_state state;
struct list_head stack_node;
@@ -66,8 +67,7 @@ struct klp_func {
/**
* struct klp_reloc - relocation structure for live patching
* @loc: address where the relocation will be written
- * @val: address of the referenced symbol (optional,
- * vmlinux patches only)
+ * @sympos: position in kallsyms to disambiguate symbols (optional)
* @type: ELF relocation type
* @name: name of the referenced symbol (for lookup/verification)
* @addend: offset from the referenced symbol
@@ -75,7 +75,7 @@ struct klp_func {
*/
struct klp_reloc {
unsigned long loc;
- unsigned long val;
+ unsigned long sympos;
unsigned long type;
const char *name;
int addend;