1. 20 Aug, 2018 2 commits
  2. 19 Aug, 2018 27 commits
  3. 18 Aug, 2018 7 commits
  4. 09 Aug, 2018 1 commit
    • Crestez Dan Leonard's avatar
      regmap: Add regmap_noinc_read API · 74fe7b55
      Crestez Dan Leonard authored
      The regmap API usually assumes that bulk read operations will read a
      range of registers but some I2C/SPI devices have certain registers for
      which a such a read operation will return data from an internal FIFO
      instead. Add an explicit API to support bulk read without range semantics.
      
      Some linux drivers use regmap_bulk_read or regmap_raw_read for such
      registers, for example mpu6050 or bmi150 from IIO. This only happens to
      work because when caching is disabled a single regmap read op will map
      to a single bus read op (as desired). This breaks if caching is enabled and
      reg+1 happens to be a cacheable register.
      
      Without regmap support refactoring a driver to enable regmap caching
      requires separate I2C and SPI paths. This is exactly what regmap is
      supposed to help avoid.
      Suggested-by: default avatarJonathan Cameron <jic23@kernel.org>
      Signed-off-by: default avatarCrestez Dan Leonard <leonard.crestez@intel.com>
      Signed-off-by: default avatarStefan Popa <stefan.popa@analog.com>
      Signed-off-by: default avatarMark Brown <broonie@kernel.org>
      74fe7b55
  5. 03 Aug, 2018 2 commits
  6. 02 Aug, 2018 1 commit
    • Chao Yu's avatar
      staging: erofs: disable compiling temporarile · 156c3df8
      Chao Yu authored
      As Stephen Rothwell reported:
      
      "After merging the staging tree, today's linux-next build (x86_64
      allmodconfig) failed like this:
      
      drivers/staging/erofs/super.c: In function 'erofs_read_super':
      drivers/staging/erofs/super.c:343:17: error: 'MS_RDONLY' undeclared (first use in this function); did you mean 'IS_RDONLY'?
        sb->s_flags |= MS_RDONLY | MS_NOATIME;
                       ^~~~~~~~~
                       IS_RDONLY
      drivers/staging/erofs/super.c:343:17: note: each undeclared identifier is reported only once for each function it appears in
      drivers/staging/erofs/super.c:343:29: error: 'MS_NOATIME' undeclared (first use in this function); did you mean 'S_NOATIME'?
        sb->s_flags |= MS_RDONLY | MS_NOATIME;
                                   ^~~~~~~~~~
                                   S_NOATIME
      drivers/staging/erofs/super.c: In function 'erofs_mount':
      drivers/staging/erofs/super.c:501:10: warning: passing argument 5 of 'mount_bdev' makes integer from pointer without a cast [-Wint-conversion]
         &priv, erofs_fill_super);
                ^~~~~~~~~~~~~~~~
      In file included from include/linux/buffer_head.h:12:0,
                       from drivers/staging/erofs/super.c:14:
      include/linux/fs.h:2151:23: note: expected 'size_t {aka long unsigned int}' but argument is of type 'int (*)(struct super_block *, void *, int)'
       extern struct dentry *mount_bdev(struct file_system_type *fs_type,
                             ^~~~~~~~~~
      drivers/staging/erofs/super.c:500:9: error: too few arguments to function 'mount_bdev'
        return mount_bdev(fs_type, flags, dev_name,
               ^~~~~~~~~~
      In file included from include/linux/buffer_head.h:12:0,
                       from drivers/staging/erofs/super.c:14:
      include/linux/fs.h:2151:23: note: declared here
       extern struct dentry *mount_bdev(struct file_system_type *fs_type,
                             ^~~~~~~~~~
      drivers/staging/erofs/super.c: At top level:
      drivers/staging/erofs/super.c:518:20: error: initialization from incompatible pointer type [-Werror=incompatible-pointer-types]
        .mount          = erofs_mount,
                          ^~~~~~~~~~~
      drivers/staging/erofs/super.c:518:20: note: (near initialization for 'erofs_fs_type.mount')
      drivers/staging/erofs/super.c: In function 'erofs_remount':
      drivers/staging/erofs/super.c:630:12: error: 'MS_RDONLY' undeclared (first use in this function); did you mean 'IS_RDONLY'?
        *flags |= MS_RDONLY;
                  ^~~~~~~~~
                  IS_RDONLY
      drivers/staging/erofs/super.c: At top level:
      drivers/staging/erofs/super.c:640:16: error: initialization from incompatible pointer type [-Werror=incompatible-pointer-types]
        .remount_fs = erofs_remount,
                      ^~~~~~~~~~~~~
      
      Caused by various commits creating erofs in the staging tree interacting
      with various commits redoing the mount infrastructure in the vfs tree.
      
      I have disabed CONFIG_EROFS_FS for now:"
      
      The reason of compiling error is:
      
      Since -next collects and merges developing patches including common vfs
      stuff from multi-trees, but those patches didn't cover erofs, such as:
      
      ('vfs: Suppress MS_* flag defs within the kernel unless explicitly enabled")
      https://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs.git/commit/?h=for-next&id=109b45090d7d3ce2797bb1ef7f70eead5bfe0ff3
      
      ("vfs: Require specification of size of mount data for internal mounts")
      https://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs.git/commit/?h=for-next&id=0a191e4505a4f255e6513b49426213da69bf0e80
      
      Above vfs related patches has not been merged in staging tree, if we
      submit those erofs patches to staging mailing list and after including
      them in staging-{test,nexts} tree, it can easily cause compiling error.
      
      We worked out some patches to adjust those vfs change, but now we just
      submit them to -next tree temporarily to avoid compiling error.
      
      For potentail conflict in between erofs and vfs changes in incoming
      merge window, Stephen suggested that we can disable CONFIG_EROFS_FS
      temporarily to pass merge window, and after that we can do restore by
      reenabling CONFIG_EROFS_FS and applying those fixing patches. Also
      Greg confirmed this solution.
      
      So, let's disable compiling erofs for a while.
      Suggested-by: default avatarStephen Rothwell <sfr@canb.auug.org.au>
      Signed-off-by: default avatarGao Xiang <gaoxiang25@huawei.com>
      Reviewed-by: default avatarGao Xiang <gaoxiang25@huawei.com>
      Signed-off-by: default avatarChao Yu <yuchao0@huawei.com>
      Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
      156c3df8