In file included from ../drivers/char/tpm/xen-tpmfront.c:17:
In file included from ../drivers/char/tpm/tpm.h:28:
../include/linux/tpm_eventlog.h:167:6: warning: variable 'mapping_size' set but not used [-Wunused-but-set-variable]
  167 |         int mapping_size;
      |             ^
1 warning generated.
../drivers/dma/dw-edma/dw-edma-core.c:27:16: warning: unused function 'dchan2dev' [-Wunused-function]
   27 | struct device *dchan2dev(struct dma_chan *dchan)
      |                ^~~~~~~~~
../drivers/dma/dw-edma/dw-edma-core.c:33:16: warning: unused function 'chan2dev' [-Wunused-function]
   33 | struct device *chan2dev(struct dw_edma_chan *chan)
      |                ^~~~~~~~
2 warnings generated.
../arch/x86/kernel/cpu/mtrr/generic.c:693:15: warning: variable 'dummy' set but not used [-Wunused-but-set-variable]
  693 |         unsigned lo, dummy;
      |                      ^
../arch/x86/kernel/cpu/mtrr/generic.c:1061:24: warning: variable 'dummy' set but not used [-Wunused-but-set-variable]
 1061 |         unsigned long config, dummy;
      |                               ^
2 warnings generated.
../arch/x86/kernel/apic/apic.c:2140: warning: Function parameter or struct member 'spurious_interrupt' not described in 'DEFINE_IDTENTRY_IRQ'
../arch/x86/kernel/apic/apic.c:2140: warning: expecting prototype for spurious_interrupt(). Prototype was for DEFINE_IDTENTRY_IRQ() instead
../drivers/hv/channel.c:578: warning: Function parameter or struct member 'size' not described in 'request_arr_init'
../drivers/ntb/msi.c:33: warning: Function parameter or struct member 'desc_changed' not described in 'ntb_msi_init'