[PATCH 1/6] drm/i915: add a helper to make a copy of i915_params

[Jani Nikula <jani.nikula@xxxxxxxxx>]

Abstract the one user in anticipation of more.

Reviewed-by: Chris Wilson <chris@xxxxxxxxxxxxxxxxxx>
Signed-off-by: Jani Nikula <jani.nikula@xxxxxxxxx>
---
 drivers/gpu/drm/i915/i915_gpu_error.c | 11 +----------
 drivers/gpu/drm/i915/i915_params.c    | 14 ++++++++++++++
 drivers/gpu/drm/i915/i915_params.h    |  1 +
 3 files changed, 16 insertions(+), 10 deletions(-)

diff --git a/drivers/gpu/drm/i915/i915_gpu_error.c b/drivers/gpu/drm/i915/i915_gpu_error.c
index 63df41d93379..8c04479c1586 100644
--- a/drivers/gpu/drm/i915/i915_gpu_error.c
+++ b/drivers/gpu/drm/i915/i915_gpu_error.c
@@ -1834,18 +1834,9 @@ static void capture_gen_state(struct i915_gpu_state *error)
 	error->driver_caps = i915->caps;
 }
 
-static __always_inline void dup_param(const char *type, void *x)
-{
-	if (!__builtin_strcmp(type, "char *"))
-		*(void **)x = kstrdup(*(void **)x, GFP_ATOMIC);
-}
-
 static void capture_params(struct i915_gpu_state *error)
 {
-	error->params = i915_modparams;
-#define DUP(T, x, ...) dup_param(#T, &error->params.x);
-	I915_PARAMS_FOR_EACH(DUP);
-#undef DUP
+	i915_params_copy(&error->params, &i915_modparams);
 }
 
 static unsigned long capture_find_epoch(const struct i915_gpu_state *error)
diff --git a/drivers/gpu/drm/i915/i915_params.c b/drivers/gpu/drm/i915/i915_params.c
index 2e0356561839..ae3ece4ec7ab 100644
--- a/drivers/gpu/drm/i915/i915_params.c
+++ b/drivers/gpu/drm/i915/i915_params.c
@@ -203,3 +203,17 @@ void i915_params_dump(const struct i915_params *params, struct drm_printer *p)
 	I915_PARAMS_FOR_EACH(PRINT);
 #undef PRINT
 }
+
+static __always_inline void dup_param(const char *type, void *x)
+{
+	if (!__builtin_strcmp(type, "char *"))
+		*(void **)x = kstrdup(*(void **)x, GFP_ATOMIC);
+}
+
+void i915_params_copy(struct i915_params *dest, const struct i915_params *src)
+{
+	*dest = *src;
+#define DUP(T, x, ...) dup_param(#T, &dest->x);
+	I915_PARAMS_FOR_EACH(DUP);
+#undef DUP
+}
diff --git a/drivers/gpu/drm/i915/i915_params.h b/drivers/gpu/drm/i915/i915_params.h
index 7e56c516c815..fd1cf9415e60 100644
--- a/drivers/gpu/drm/i915/i915_params.h
+++ b/drivers/gpu/drm/i915/i915_params.h
@@ -78,6 +78,7 @@ struct i915_params {
 extern struct i915_params i915_modparams __read_mostly;
 
 void i915_params_dump(const struct i915_params *params, struct drm_printer *p);
+void i915_params_copy(struct i915_params *dest, const struct i915_params *src);
 
 #endif
 
-- 
2.11.0

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