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https://github.com/AuxXxilium/arc-lkm.git
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26 lines
1.1 KiB
C
26 lines
1.1 KiB
C
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/**
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* This very simple submodule which prevents kernel log from being flooded with "I/O scheduler elevator not found"
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*
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* When this shim is loaded as a I/O scheduler (to load very early) it is being set as a I/O scheduler. As we later
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* remove the module file the system will constantly try to load now non-existing module "elevator-iosched". By
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* resetting the "chosen_elevator" using the same function called by "elevator=" handler we can pretend no custom
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* I/O scheduler was ever set (so that the system uses default one and stops complaining)
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*/
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#include "ioscheduler_fixer.h"
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#include "../common.h"
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#include "call_protected.h" //is_system_booting(), elevator_setup()
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#include <linux/kernel.h> //system_state
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#define SHIM_NAME "I/O scheduler fixer"
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int reset_elevator(void)
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{
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if (!is_system_booting()) {
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pr_loc_wrn("Cannot reset I/O scheduler / elevator= set - system is past booting stage (state=%d)",
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system_state);
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return 0; //This is not an error technically speaking
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}
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pr_loc_dbg("Resetting I/O scheduler to default");
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return _elevator_setup("") == 1 ? 0 : -EINVAL;
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}
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