From e11640b9cea4e0c448df1d31b9e950fa52cf19af Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Thomas=20Hellstr=C3=B6m?= Date: Sat, 25 Jul 2026 12:00:32 +0200 Subject: cgroup/dmem: Introduce struct dmem_cgroup_init for region initialization MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Replace the bare u64 size argument to dmem_cgroup_register_region() and drmm_cgroup_register_region() with a const struct dmem_cgroup_init * pointer. The struct currently carries only the size field, but using a struct makes the API extensible: future callers can supply additional initialization parameters without adding more positional arguments. Update all in-tree callers (amdgpu, xe) to use a compound-literal initializer. v5: - Commit introduced. Assisted-by: GitHub_Copilot:claude-sonnet-4.6 Signed-off-by: Thomas Hellström Reviewed-by: Maarten Lankhorst Tested-by: Thadeu Lima de Souza Cascardo Link: https://patch.msgid.link/20260725100036.2372-3-thomas.hellstrom@linux.intel.com Acked-by: Dave Airlie Acked-by: Christian König Signed-off-by: Maarten Lankhorst --- kernel/cgroup/dmem.c | 10 ++++++---- 1 file changed, 6 insertions(+), 4 deletions(-) (limited to 'kernel') diff --git a/kernel/cgroup/dmem.c b/kernel/cgroup/dmem.c index 1af08b0464b8..aea21e39180a 100644 --- a/kernel/cgroup/dmem.c +++ b/kernel/cgroup/dmem.c @@ -502,7 +502,7 @@ EXPORT_SYMBOL_GPL(dmem_cgroup_unregister_region); /** * dmem_cgroup_register_region() - Register a regions for dev cgroup. - * @size: Size of region to register, in bytes. + * @init: Initialization parameters for the region. * @fmt: Region parameters to register * * This function registers a node in the dmem cgroup with the @@ -511,13 +511,15 @@ EXPORT_SYMBOL_GPL(dmem_cgroup_unregister_region); * * Return: NULL or a struct on success, PTR_ERR on failure. */ -struct dmem_cgroup_region *dmem_cgroup_register_region(u64 size, const char *fmt, ...) +struct dmem_cgroup_region * +dmem_cgroup_register_region(const struct dmem_cgroup_init *init, + const char *fmt, ...) { struct dmem_cgroup_region *ret; char *region_name; va_list ap; - if (!size) + if (!init || !init->size) return NULL; va_start(ap, fmt); @@ -534,7 +536,7 @@ struct dmem_cgroup_region *dmem_cgroup_register_region(u64 size, const char *fmt INIT_LIST_HEAD(&ret->pools); ret->name = region_name; - ret->size = size; + ret->size = init->size; kref_init(&ret->ref); spin_lock(&dmemcg_lock); -- cgit v1.2.3