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Driver core patches for 4.20-rc1

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Driver core patches for 4.20-rc1
 
 Here is a small number of driver core patches for 4.20-rc1.
 
 Not much happened here this merge window, only a very tiny number of
 patches that do:
 	- add BUS_ATTR_WO() for use by drivers
 	- component error path fixes
 	- kernfs range check fix
 	- other tiny error path fixes and const changes
 
 All of these have been in linux-next with no reported issues for a
 while.
 
 Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Merge tag 'driver-core-4.20-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core

Pull driver core updates from Greg KH:
 "Here is a small number of driver core patches for 4.20-rc1.

  Not much happened here this merge window, only a very tiny number of
  patches that do:

   - add BUS_ATTR_WO() for use by drivers

   - component error path fixes

   - kernfs range check fix

   - other tiny error path fixes and const changes

  All of these have been in linux-next with no reported issues for a
  while"

* tag 'driver-core-4.20-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core:
  devres: provide devm_kstrdup_const()
  mm: move is_kernel_rodata() to asm-generic/sections.h
  devres: constify p in devm_kfree()
  driver core: add BUS_ATTR_WO() macro
  kernfs: Fix range checks in kernfs_get_target_path
  component: fix loop condition to call unbind() if bind() fails
  drivers/base/devtmpfs.c: don't pretend path is const in delete_path
  kernfs: update comment about kernfs_path() return value
This commit is contained in:
Linus Torvalds 2018-10-26 08:42:25 -07:00
commit 26873acacb
8 changed files with 66 additions and 19 deletions
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6
include/linux/device.h
View file

@ -55,6 +55,8 @@ struct bus_attribute {
struct bus_attribute bus_attr_##_name = __ATTR_RW(_name)
#define BUS_ATTR_RO(_name) \
struct bus_attribute bus_attr_##_name = __ATTR_RO(_name)
#define BUS_ATTR_WO(_name) \
struct bus_attribute bus_attr_##_name = __ATTR_WO(_name)
extern int __must_check bus_create_file(struct bus_type *,
struct bus_attribute *);
@ -692,8 +694,10 @@ static inline void *devm_kcalloc(struct device *dev,
{
return devm_kmalloc_array(dev, n, size, flags | __GFP_ZERO);
}
extern void devm_kfree(struct device *dev, void *p);
extern void devm_kfree(struct device *dev, const void *p);
extern char *devm_kstrdup(struct device *dev, const char *s, gfp_t gfp) __malloc;
extern const char *devm_kstrdup_const(struct device *dev,
const char *s, gfp_t gfp);
extern void *devm_kmemdup(struct device *dev, const void *src, size_t len,
gfp_t gfp);

9
include/linux/kernfs.h
View file

@ -477,10 +477,11 @@ static inline void kernfs_init(void) { }
* @buf: buffer to copy @kn's name into
* @buflen: size of @buf
*
* Builds and returns the full path of @kn in @buf of @buflen bytes. The
* path is built from the end of @buf so the returned pointer usually
* doesn't match @buf. If @buf isn't long enough, @buf is nul terminated
* and %NULL is returned.
* If @kn is NULL result will be "(null)".
*
* Returns the length of the full path. If the full length is equal to or
* greater than @buflen, @buf contains the truncated path with the trailing
* '\0'. On error, -errno is returned.
*/
static inline int kernfs_path(struct kernfs_node *kn, char *buf, size_t buflen)
{