linux-toradex.git/drivers/base/devres.c, branch v5.11-rc6

drivers: base: fix some kernel-doc markups

2020-11-09T17:56:49+00:00

class_create is actually defined at the header. Fix the
markup there and add a new one at the right place.

While here, also fix some markups for functions that have
different names between their prototypes and kernel-doc
comments.

Signed-off-by: Mauro Carvalho Chehab 
Link: https://lore.kernel.org/r/2fb6efd6a1f90d69ff73bf579566079cbb051e15.1603469755.git.mchehab+huawei@kernel.org
Signed-off-by: Greg Kroah-Hartman

devres: provide devm_krealloc()

2020-09-08T11:32:06+00:00

Implement the managed variant of krealloc(). This function works with
all memory allocated by devm_kmalloc() (or devres functions using it
implicitly like devm_kmemdup(), devm_kstrdup() etc.).

Managed realloc'ed chunks can be manually released with devm_kfree().

Signed-off-by: Bartosz Golaszewski 
Reviewed-by: Andy Shevchenko 
Link: https://lore.kernel.org/r/20200824173859.4910-2-brgl@bgdev.pl
Signed-off-by: Greg Kroah-Hartman

devres: handle zero size in devm_kmalloc()

2020-07-02T12:36:02+00:00

Make devm_kmalloc() behave similarly to non-managed kmalloc(): return
ZERO_SIZE_PTR when requested size is 0. Update devm_kfree() to handle
this case.

Signed-off-by: Bartosz Golaszewski 
Link: https://lore.kernel.org/r/20200629065008.27620-5-brgl@bgdev.pl
Signed-off-by: Greg Kroah-Hartman

devres: move the size check from alloc_dr() into a separate function

2020-07-02T12:36:02+00:00

We will perform the same size check in devm_krealloc(). Move the relevant
code into a separate helper.

Signed-off-by: Bartosz Golaszewski 
Link: https://lore.kernel.org/r/20200629065008.27620-3-brgl@bgdev.pl
Signed-off-by: Greg Kroah-Hartman

devres: remove stray space from devm_kmalloc() definition

2020-07-02T12:36:01+00:00

Use the preferred coding style for functions returning pointers.

Signed-off-by: Bartosz Golaszewski 
Link: https://lore.kernel.org/r/20200629065008.27620-2-brgl@bgdev.pl
Signed-off-by: Greg Kroah-Hartman

drivers/base/devres: introduce devm_release_action()

2019-06-14T03:34:56+00:00

Patch series "mm/devm_memremap_pages: Fix page release race", v2.

Logan audited the devm_memremap_pages() shutdown path and noticed that
it was possible to proceed to arch_remove_memory() before all potential
page references have been reaped.

Introduce a new ->cleanup() callback to do the work of waiting for any
straggling page references and then perform the percpu_ref_exit() in
devm_memremap_pages_release() context.

For p2pdma this involves some deeper reworks to reference count
resources on a per-instance basis rather than a per pci-device basis.  A
modified genalloc api is introduced to convey a driver-private pointer
through gen_pool_{alloc,free}() interfaces.  Also, a
devm_memunmap_pages() api is introduced since p2pdma does not
auto-release resources on a setup failure.

The dax and pmem changes pass the nvdimm unit tests, and the p2pdma
changes should now pass testing with the pci_p2pdma_release() fix.
Jrme, how does this look for HMM?

This patch (of 6):

The devm_add_action() facility allows a resource allocation routine to
add custom devm semantics.  One such user is devm_memremap_pages().

There is now a need to manually trigger
devm_memremap_pages_release().  Introduce devm_release_action() so the
release action can be triggered via a new devm_memunmap_pages() api in a
follow-on change.

Link: http://lkml.kernel.org/r/155727336530.292046.2926860263201336366.stgit@dwillia2-desk3.amr.corp.intel.com
Signed-off-by: Dan Williams 
Reviewed-by: Ira Weiny 
Reviewed-by: Logan Gunthorpe 
Cc: Bjorn Helgaas 
Cc: Christoph Hellwig 
Cc: Greg Kroah-Hartman 
Cc: "Rafael J. Wysocki" 
Cc: "Jérôme Glisse" 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

devres: Align data[] to ARCH_KMALLOC_MINALIGN

2018-11-11T19:40:04+00:00

Initially we bumped into problem with 32-bit aligned atomic64_t
on ARC, see [1]. And then during quite lengthly discussion Peter Z.
mentioned ARCH_KMALLOC_MINALIGN which IMHO makes perfect sense.
If allocation is done by plain kmalloc() obtained buffer will be
ARCH_KMALLOC_MINALIGN aligned and then why buffer obtained via
devm_kmalloc() should have any other alignment?

This way we at least get the same behavior for both types of
allocation.

[1] http://lists.infradead.org/pipermail/linux-snps-arc/2018-July/004009.html
[2] http://lists.infradead.org/pipermail/linux-snps-arc/2018-July/004036.html

Signed-off-by: Alexey Brodkin 
Cc: Greg Kroah-Hartman 
Cc: Geert Uytterhoeven 
Cc: David Laight 
Cc: Peter Zijlstra 
Cc: Thomas Gleixner 
Cc: Vineet Gupta 
Cc: Will Deacon 
Cc: Greg KH 
Cc:  # 4.8+
Signed-off-by: Greg Kroah-Hartman

devres: provide devm_kstrdup_const()

2018-10-16T10:53:27+00:00

Provide a resource managed version of kstrdup_const(). This variant
internally calls devm_kstrdup() on pointers that are outside of
.rodata section and returns the string as is otherwise.

Make devm_kfree() check if the passed pointer doesn't point to .rodata
and if so - don't actually destroy the resource.

Signed-off-by: Bartosz Golaszewski 
Reviewed-by: Bjorn Andersson 
Acked-by: Mike Rapoport 
Acked-by: Rasmus Villemoes 
Reviewed-by: Geert Uytterhoeven 
Reviewed-by: Andy Shevchenko 
Signed-off-by: Greg Kroah-Hartman

devres: constify p in devm_kfree()

2018-10-16T10:53:27+00:00

Make devm_kfree() signature uniform with that of kfree(). To avoid
compiler warnings: cast p to (void *) when calling devres_destroy().

Signed-off-by: Bartosz Golaszewski 
Reviewed-by: Bjorn Andersson 
Reviewed-by: Geert Uytterhoeven 
Acked-by: Rasmus Villemoes 
Reviewed-by: Andy Shevchenko 
Signed-off-by: Greg Kroah-Hartman

device: Use overflow helpers for devm_kmalloc()

2018-06-05T19:16:51+00:00

Use the overflow helpers both in existing multiplication-using inlines as
well as the addition-overflow case in the core allocation routine.

Signed-off-by: Kees Cook