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drm/i915: Make semaphore modparam RO 

A couple patches in the upcoming rework of semaphores will break if
semaphores are toggled by the user at various times. Since the code
cleanups there seem to be an overall win, and toggling semaphores at
runtime is not a terribly useful thing to do, simply make the module
parameter read-only.

Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
Cc: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Ben Widawsky <ben@bwidawsk.net>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
This commit is contained in:
Ben Widawsky 2013-12-17 15:06:42 -08:00 committed by Daniel Vetter
parent f0a9f74c0d
commit fae0ce15c2
1 changed files with 1 additions and 1 deletions
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2
drivers/gpu/drm/i915/i915_drv.c
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@ -59,7 +59,7 @@ MODULE_PARM_DESC(powersave,
"Enable powersavings, fbc, downclocking, etc. (default: true)");
int i915_semaphores __read_mostly = -1;
module_param_named(semaphores, i915_semaphores, int, 0600);
module_param_named(semaphores, i915_semaphores, int, 0400);
MODULE_PARM_DESC(semaphores,
"Use semaphores for inter-ring sync (default: -1 (use per-chip defaults))");