kernel/linux.git/drivers/base/devres.c, branch v5.10.258

devres: fix missing node debug info in devm_krealloc()

2026-06-01T15:29:30+00:00

[ Upstream commit f813ec9e84b4d0ca81ec1da94ab07bfb4a29266c ] Fix missing call to set_node_dbginfo() for new devres nodes created by devm_krealloc(). Fixes: f82485722e5d ("devres: provide devm_krealloc()") Reviewed-by: Greg Kroah-Hartman Link: https://patch.msgid.link/20260202235210.55176-2-dakr@kernel.org Signed-off-by: Danilo Krummrich Signed-off-by: Sasha Levin

devres: Initialize an uninitialized struct member

2024-09-12T09:06:48+00:00

[ Upstream commit 56a20ad349b5c51909cf8810f7c79b288864ad33 ] Initialize an uninitialized struct member for driver API devres_open_group(). Signed-off-by: Zijun Hu Link: https://lore.kernel.org/r/1719931914-19035-4-git-send-email-quic_zijuhu@quicinc.com Signed-off-by: Greg Kroah-Hartman Signed-off-by: Sasha Levin

devres: Fix memory leakage caused by driver API devm_free_percpu()

2024-08-19T03:41:07+00:00

[ Upstream commit bd50a974097bb82d52a458bd3ee39fb723129a0c ] It will cause memory leakage when use driver API devm_free_percpu() to free memory allocated by devm_alloc_percpu(), fixed by using devres_release() instead of devres_destroy() within devm_free_percpu(). Fixes: ff86aae3b411 ("devres: add devm_alloc_percpu()") Cc: stable@vger.kernel.org Signed-off-by: Zijun Hu Link: https://lore.kernel.org/r/1719931914-19035-3-git-send-email-quic_zijuhu@quicinc.com Signed-off-by: Greg Kroah-Hartman Signed-off-by: Sasha Levin

driver core: Cast to (void *) with force for percpu pointer

2024-08-19T03:41:07+00:00

[ Upstream commit d7aa44f5a1f86cb40659eef06035d8d92604b9d5 ] Sparse is not happy: drivers/base/devres.c:1230:9: warning: cast removes address space '__percpu' of expression Use __force attribute to make it happy. Signed-off-by: Andy Shevchenko Link: https://lore.kernel.org/r/20210401171030.60527-1-andriy.shevchenko@linux.intel.com Signed-off-by: Greg Kroah-Hartman Stable-dep-of: bd50a974097b ("devres: Fix memory leakage caused by driver API devm_free_percpu()") Signed-off-by: Sasha Levin

devres: Fix devm_krealloc() wasting memory

2024-08-19T03:41:00+00:00

commit c884e3249f753dcef7a2b2023541ac1dc46b318e upstream. Driver API devm_krealloc() calls alloc_dr() with wrong argument @total_new_size, so causes more memory to be allocated than required fix this memory waste by using @new_size as the argument for alloc_dr(). Fixes: f82485722e5d ("devres: provide devm_krealloc()") Cc: stable@vger.kernel.org Signed-off-by: Zijun Hu Link: https://lore.kernel.org/r/1719931914-19035-2-git-send-email-quic_zijuhu@quicinc.com 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