drivers/iommu/intel/dmar.c:2023 dmar_detect_dsm() warn: should '1 << func' be a 64 bit type?

drivers/iommu/intel/dmar.c:2023 dmar_detect_dsm() warn: should '1 << func' be a 64 bit type?

[kernel test robot]

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CC: kbuild-all(a)lists.01.org
CC: linux-kernel(a)vger.kernel.org
TO: Joerg Roedel <jroedel@suse.de>
CC: Jerry Snitselaar <jsnitsel@redhat.com>
CC: Lu Baolu <baolu.lu@linux.intel.com>

Hi Joerg,

First bad commit (maybe != root cause):

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   a050a6d2b7e80ca52b2f4141eaf3420d201b72b3
commit: 672cf6df9b8a3a6d70a6a5c30397f76fa40d3178 iommu/vt-d: Move Intel IOMMU driver into subdirectory
date:   12 months ago
:::::: branch date: 8 hours ago
:::::: commit date: 12 months ago
config: x86_64-randconfig-m001-20210525 (attached as .config)
compiler: gcc-9 (Debian 9.3.0-22) 9.3.0

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@intel.com>
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>

smatch warnings:
drivers/iommu/intel/dmar.c:2023 dmar_detect_dsm() warn: should '1 << func' be a 64 bit type?

vim +2023 drivers/iommu/intel/dmar.c

6b1972493a84f8 drivers/iommu/dmar.c Jiang Liu       2014-11-09  2020  
6b1972493a84f8 drivers/iommu/dmar.c Jiang Liu       2014-11-09  2021  static inline bool dmar_detect_dsm(acpi_handle handle, int func)
6b1972493a84f8 drivers/iommu/dmar.c Jiang Liu       2014-11-09  2022  {
94116f8126de97 drivers/iommu/dmar.c Andy Shevchenko 2017-06-05 @2023  	return acpi_check_dsm(handle, &dmar_hp_guid, DMAR_DSM_REV_ID, 1 << func);
6b1972493a84f8 drivers/iommu/dmar.c Jiang Liu       2014-11-09  2024  }
6b1972493a84f8 drivers/iommu/dmar.c Jiang Liu       2014-11-09  2025  

:::::: The code@line 2023 was first introduced by commit
:::::: 94116f8126de9762751fd92731581b73b56292e5 ACPI: Switch to use generic guid_t in acpi_evaluate_dsm()

:::::: TO: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
:::::: CC: Christoph Hellwig <hch@lst.de>

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all(a)lists.01.org

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