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intel_fb: remove schedule_timeout wrap

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Issue #4540
This commit is contained in:
Alexander Boettcher
2022-06-16 14:57:15 +02:00
committed by Christian Helmuth
parent 9ecbe51e34
commit 7b4556e546
4 changed files with 0 additions and 146 deletions
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7
repos/pc/src/drivers/framebuffer/intel/pc/target.inc
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@@ -18,7 +18,6 @@ SRC_C += $(notdir $(wildcard $(REL_PRG_DIR)/generated_dummies.c))
SRC_C += fb.c
SRC_C += lx_user.c
SRC_C += gem.c
SRC_C += timeout.c
SRC_C += lx_emul/common_dummies.c
SRC_C += lx_emul/spec/x86/pci.c
SRC_C += lx_emul/shadow/kernel/softirq.c
@@ -49,12 +48,6 @@ CC_OPT_generated_dummies += -include $(LX_SRC_DIR)/drivers/gpu/drm/i915/i915_drv
CC_C_OPT += -Wno-unused-label
#
# Original symbol is renamed to __real_* and references to original symbol
# are replaced by __wrap_*. Used to shadow schedule_timeout, see timeout.c
#
LD_OPT += --wrap=schedule_timeout
#
# Genode C-API backends
#

33
repos/pc/src/drivers/framebuffer/intel/pc/timeout.c
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@@ -1,33 +0,0 @@
/*
* \brief Wrapper to update jiffies before invoking schedule_timeout().
* Schedule_timeout() expects that the jiffie value is current,
* in order to setup the timeouts. Without current jiffies,
* the programmed timeouts are too short, which leads to timeouts
* firing too early. The Intel driver uses this mechanism frequently
* by utilizing wait_queue_timeout*() in order to wait for hardware
* state changes, e.g. connectors hotplug. The schedule_timeout is
* shadowed by the Linker feature '--wrap'. This code can be removed
* as soon as the timeout handling is implemented by lx_emul/lx_kit
* instead of using the original Linux sources of kernel/time/timer.c.
* \author Alexander Boettcher
* \date 2022-04-04
*/
/*
* Copyright (C) 2022 Genode Labs GmbH
*
* This file is distributed under the terms of the GNU General Public License
* version 2.
*/
#include <lx_emul/time.h>
signed long __real_schedule_timeout(signed long timeout);
signed long __wrap_schedule_timeout(signed long timeout)
{
lx_emul_force_jiffies_update();
return __real_schedule_timeout(timeout);
}