drivers/ptp/ptp_vmclock.c:392:24: warning: unused variable 'st'

[kernel test robot <lkp@intel.com>]

:::::: 
:::::: Manual check reason: "bisect to a FBC not belonging to original linux-review patches: branch: linux-review/Arthur-Kiyanovski/ptp-Add-ioctls-for-PHC-timestamps-with-quality-attributes/20260501-120618, commit: df313359b943b68d54c834330766e4f1d3afade0"
:::::: 

BCC: lkp@intel.com
CC: oe-kbuild-all@lists.linux.dev
TO: Arthur Kiyanovski <akiyano@amazon.com>
CC: 0day robot <lkp@intel.com>

tree:   https://github.com/intel-lab-lkp/linux/commits/Arthur-Kiyanovski/ptp-Add-ioctls-for-PHC-timestamps-with-quality-attributes/20260501-120618
head:   02bdf82208619595607dd1a4004fa7b729f7b43a
commit: df313359b943b68d54c834330766e4f1d3afade0 ptp: ptp_vmclock: Implement attributes ioctls
date:   3 days ago
:::::: branch date: 3 days ago
:::::: commit date: 3 days ago
config: arm64-randconfig-001-20260503 (https://download.01.org/0day-ci/archive/20260504/202605040151.8XwAzkix-lkp@intel.com/config)
compiler: aarch64-linux-gcc (GCC) 8.5.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260504/202605040151.8XwAzkix-lkp@intel.com/reproduce)

If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@intel.com>
| Closes: https://lore.kernel.org/r/202605040151.8XwAzkix-lkp@intel.com/

All warnings (new ones prefixed by >>):

   drivers/ptp/ptp_vmclock.c: In function 'ptp_vmclock_do_getcrosststamp':
>> drivers/ptp/ptp_vmclock.c:392:24: warning: unused variable 'st' [-Wunused-variable]
     struct vmclock_state *st = vctx->st;
                           ^~


vim +/st +392 drivers/ptp/ptp_vmclock.c

20503272422693d David Woodhouse   2024-10-06  388  
df313359b943b68 Arthur Kiyanovski 2026-04-30  389  static int ptp_vmclock_do_getcrosststamp(struct vmclock_crosststamp_ctx *vctx,
20503272422693d David Woodhouse   2024-10-06  390  					 struct system_device_crosststamp *xtstamp)
20503272422693d David Woodhouse   2024-10-06  391  {
df313359b943b68 Arthur Kiyanovski 2026-04-30 @392  	struct vmclock_state *st = vctx->st;
df313359b943b68 Arthur Kiyanovski 2026-04-30  393  	int ret = get_device_system_crosststamp(ptp_vmclock_get_time_fn, vctx,
20503272422693d David Woodhouse   2024-10-06  394  						NULL, xtstamp);
20503272422693d David Woodhouse   2024-10-06  395  #ifdef SUPPORT_KVMCLOCK
20503272422693d David Woodhouse   2024-10-06  396  	/*
20503272422693d David Woodhouse   2024-10-06  397  	 * On x86, the KVM clock may be used for the system time. We can
20503272422693d David Woodhouse   2024-10-06  398  	 * actually convert a TSC reading to that, and return a paired
20503272422693d David Woodhouse   2024-10-06  399  	 * timestamp that get_device_system_crosststamp() *can* handle.
20503272422693d David Woodhouse   2024-10-06  400  	 */
20503272422693d David Woodhouse   2024-10-06  401  	if (ret == -ENODEV) {
20503272422693d David Woodhouse   2024-10-06  402  		struct system_time_snapshot systime_snapshot;
20503272422693d David Woodhouse   2024-10-06  403  
20503272422693d David Woodhouse   2024-10-06  404  		ktime_get_snapshot(&systime_snapshot);
20503272422693d David Woodhouse   2024-10-06  405  
20503272422693d David Woodhouse   2024-10-06  406  		if (systime_snapshot.cs_id == CSID_X86_TSC ||
20503272422693d David Woodhouse   2024-10-06  407  		    systime_snapshot.cs_id == CSID_X86_KVM_CLK) {
20503272422693d David Woodhouse   2024-10-06  408  			WRITE_ONCE(st->sys_cs_id, systime_snapshot.cs_id);
20503272422693d David Woodhouse   2024-10-06  409  			ret = get_device_system_crosststamp(ptp_vmclock_get_time_fn,
df313359b943b68 Arthur Kiyanovski 2026-04-30  410  							    vctx, NULL, xtstamp);
20503272422693d David Woodhouse   2024-10-06  411  		}
20503272422693d David Woodhouse   2024-10-06  412  	}
20503272422693d David Woodhouse   2024-10-06  413  #endif
20503272422693d David Woodhouse   2024-10-06  414  	return ret;
20503272422693d David Woodhouse   2024-10-06  415  }
20503272422693d David Woodhouse   2024-10-06  416  

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