[ammarfaizi2-block:google/android/kernel/common/android-4.19-stable 1647/9999] fs/incfs/data_mgmt.h:318:44: sparse: sparse: cast truncates bits from constant value (5346434e49 becomes 46434e49)

[ammarfaizi2-block:google/android/kernel/common/android-4.19-stable 1647/9999] fs/incfs/data_mgmt.h:318:44: sparse: sparse: cast truncates bits from constant value (5346434e49 becomes 46434e49)

[kernel test robot]

tree:   https://github.com/ammarfaizi2/linux-block google/android/kernel/common/android-4.19-stable
head:   ef8b9b38090e63de841d55b568aa5f60c587f14c
commit: 4c79cf5d012528485d0f2433eddab96b0c116776 [1647/9999] ANDROID: Incremental fs: Fix four error-path bugs
config: i386-randconfig-s002 (https://download.01.org/0day-ci/archive/20230303/202303031458.ffUHcc1E-lkp@intel.com/config)
compiler: gcc-11 (Debian 11.3.0-8) 11.3.0
reproduce:
        # apt-get install sparse
        # sparse version: v0.6.4-39-gce1a6720-dirty
        # https://github.com/ammarfaizi2/linux-block/commit/4c79cf5d012528485d0f2433eddab96b0c116776
        git remote add ammarfaizi2-block https://github.com/ammarfaizi2/linux-block
        git fetch --no-tags ammarfaizi2-block google/android/kernel/common/android-4.19-stable
        git checkout 4c79cf5d012528485d0f2433eddab96b0c116776
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        make W=1 C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' O=build_dir ARCH=i386 olddefconfig
        make W=1 C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' O=build_dir ARCH=i386 SHELL=/bin/bash fs/

If you fix the issue, kindly add following tag where applicable
| Reported-by: kernel test robot <lkp@intel.com>
| Link: https://lore.kernel.org/oe-kbuild-all/202303031458.ffUHcc1E-lkp@intel.com/

sparse warnings: (new ones prefixed by >>)
   fs/incfs/data_mgmt.c: note: in included file:
>> fs/incfs/data_mgmt.h:318:44: sparse: sparse: cast truncates bits from constant value (5346434e49 becomes 46434e49)
   fs/incfs/data_mgmt.c: In function 'incfs_process_new_hash_block':
   fs/incfs/data_mgmt.c:1026:28: warning: variable 'mi' set but not used [-Wunused-but-set-variable]
    1026 |         struct mount_info *mi = NULL;
         |                            ^~
--
   fs/incfs/vfs.c: note: in included file:
>> fs/incfs/data_mgmt.h:318:44: sparse: sparse: cast truncates bits from constant value (5346434e49 becomes 46434e49)
   fs/incfs/vfs.c:1256:48: sparse: sparse: non size-preserving integer to pointer cast
   fs/incfs/vfs.c:2180:23: sparse: sparse: cast truncates bits from constant value (5346434e49 becomes 46434e49)
   fs/incfs/vfs.c: In function 'ioctl_create_file':
   fs/incfs/vfs.c:1256:31: warning: cast to pointer from integer of different size [-Wint-to-pointer-cast]
    1256 |                               (u8 __user *)args.signature_info,
         |                               ^
   In file included from fs/incfs/vfs.c:19:
   fs/incfs/vfs.c: In function 'incfs_mount_fs':
   include/uapi/linux/incrementalfs.h:21:28: warning: conversion from 'long long unsigned int' to 'long unsigned int' changes value from '357661101641' to '1178816073' [-Woverflow]
      21 | #define INCFS_MAGIC_NUMBER (0x5346434e49ul)
         |                            ^
   fs/incfs/vfs.c:2180:23: note: in expansion of macro 'INCFS_MAGIC_NUMBER'
    2180 |         sb->s_magic = INCFS_MAGIC_NUMBER;
         |                       ^~~~~~~~~~~~~~~~~~

vim +318 fs/incfs/data_mgmt.h

   295	
   296	/*
   297	 * Collects pending reads and saves them into the array (reads/reads_size).
   298	 * Only reads with serial_number > sn_lowerbound are reported.
   299	 * Returns how many reads were saved into the array.
   300	 */
   301	int incfs_collect_pending_reads(struct mount_info *mi, int sn_lowerbound,
   302					struct incfs_pending_read_info *reads,
   303					int reads_size);
   304	
   305	int incfs_collect_logged_reads(struct mount_info *mi,
   306				       struct read_log_state *start_state,
   307				       struct incfs_pending_read_info *reads,
   308				       int reads_size);
   309	struct read_log_state incfs_get_log_state(struct mount_info *mi);
   310	int incfs_get_uncollected_logs_count(struct mount_info *mi,
   311					     const struct read_log_state *state);
   312	
   313	static inline struct inode_info *get_incfs_node(struct inode *inode)
   314	{
   315		if (!inode)
   316			return NULL;
   317	
 > 318		if (inode->i_sb->s_magic != (long) INCFS_MAGIC_NUMBER) {
   319			/* This inode doesn't belong to us. */
   320			pr_warn_once("incfs: %s on an alien inode.", __func__);
   321			return NULL;
   322		}
   323	
   324		return container_of(inode, struct inode_info, n_vfs_inode);
   325	}
   326	

-- 
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https://github.com/intel/lkp-tests