kernel/linux.git/drivers/cxl/core/features.c, branch linux-7.0.y

Convert 'alloc_flex' family to use the new default GFP_KERNEL argument

2026-02-22T01:09:51+00:00

This is the exact same thing as the 'alloc_obj()' version, only much smaller because there are a lot fewer users of the *alloc_flex() interface. As with alloc_obj() version, this was done entirely with mindless brute force, using the same script, except using 'flex' in the pattern rather than 'objs*'. Signed-off-by: Linus Torvalds

Convert 'alloc_obj' family to use the new default GFP_KERNEL argument

2026-02-22T01:09:51+00:00

This was done entirely with mindless brute force, using git grep -l '\

treewide: Replace kmalloc with kmalloc_obj for non-scalar types

2026-02-21T09:02:28+00:00

This is the result of running the Coccinelle script from scripts/coccinelle/api/kmalloc_objs.cocci. The script is designed to avoid scalar types (which need careful case-by-case checking), and instead replace kmalloc-family calls that allocate struct or union object instances: Single allocations: kmalloc(sizeof(TYPE), ...) are replaced with: kmalloc_obj(TYPE, ...) Array allocations: kmalloc_array(COUNT, sizeof(TYPE), ...) are replaced with: kmalloc_objs(TYPE, COUNT, ...) Flex array allocations: kmalloc(struct_size(PTR, FAM, COUNT), ...) are replaced with: kmalloc_flex(*PTR, FAM, COUNT, ...) (where TYPE may also be *VAR) The resulting allocations no longer return "void *", instead returning "TYPE *". Signed-off-by: Kees Cook

cxl/features: Add check for no entries in cxl_feature_info

2025-10-13T20:47:49+00:00

cxl EDAC calls cxl_feature_info() to get the feature information and if the hardware has no Features support, cxlfs may be passed in as NULL. [ 51.957498] BUG: kernel NULL pointer dereference, address: 0000000000000008 [ 51.965571] #PF: supervisor read access in kernel mode [ 51.971559] #PF: error_code(0x0000) - not-present page [ 51.977542] PGD 17e4f6067 P4D 0 [ 51.981384] Oops: Oops: 0000 [#1] SMP NOPTI [ 51.986300] CPU: 49 UID: 0 PID: 3782 Comm: systemd-udevd Not tainted 6.17.0dj test+ #64 PREEMPT(voluntary) [ 51.997355] Hardware name: [ 52.009790] RIP: 0010:cxl_feature_info+0xa/0x80 [cxl_core] Add a check for cxlfs before dereferencing it and return -EOPNOTSUPP if there is no cxlfs created due to no hardware support. Fixes: eb5dfcb9e36d ("cxl: Add support to handle user feature commands for set feature") Reviewed-by: Davidlohr Bueso Reviewed-by: Alison Schofield Signed-off-by: Dave Jiang

cxl: fix return value in cxlctl_validate_set_features()

2025-06-09T16:18:15+00:00

The cxlctl_validate_set_features() function is type bool. It's supposed to return true for valid requests and false for invalid. However, this error path returns ERR_PTR(-EINVAL) which is true when it was intended to return false. The incorrect return will result in kernel failing to prevent a incorrect op_size passed in from userspace to be detected. [ dj: Add user impact to commit log ] Fixes: f76e0bbc8bc3 ("cxl: Update prototype of function get_support_feature_info()") Signed-off-by: Dan Carpenter Reviewed-by: Ira Weiny Link: https://patch.msgid.link/aDbFPSCujpJLY1if@stanley.mountain Signed-off-by: Dave Jiang

Merge branch 'for-6.16/cxl-features-ras' into cxl-for-next

2025-05-23T20:26:24+00:00

Add CXL RAS Features support. Features include "patrol scrub control", "error check scrub", "perform maintenance", and "memory sparing". This support connects the RAS Featurs to EDAC.

cxl: Update prototype of function get_support_feature_info()

2025-05-23T20:24:00+00:00

Add following changes to function get_support_feature_info() 1. Make generic to share between cxl-fwctl and cxl-edac paths. 2. Rename get_support_feature_info() to cxl_feature_info() 3. Change parameter const struct fwctl_rpc_cxl *rpc_in to const uuid_t *uuid. Suggested-by: Dan Williams Reviewed-by: Dave Jiang Reviewed-by: Jonathan Cameron Signed-off-by: Shiju Jose Reviewed-by: Fan Ni Reviewed-by: Alison Schofield Acked-by: Dan Williams Link: https://patch.msgid.link/20250521124749.817-3-shiju.jose@huawei.com Signed-off-by: Dave Jiang

cxl/features: Remove the inline specifier from to_cxlfs()

2025-05-22T14:39:01+00:00

to_cxlfs() was declared 'inline' in the header but only defined in drivers/cxl/core/features.c. This has worked because features.c was the only file using the function and the definition happened to be available in the same compilation unit. However, in preparation for a second .c file using the header and needing to call the function, the inline specifier became an issue. Sparse flagged the declaration as invalid since 'inline' requires a visible definition at the point of use. Defining the function in the header was considered but rejected, as it depends on internal symbols not visible at that level. Remove the inline specifier to correct the linkage violation. Signed-off-by: Alison Schofield Reviewed-by: Dave Jiang Reviewed-by: Jonathan Cameron Reviewed-by: Shiju Jose Link: https://patch.msgid.link/20250521233625.1745849-1-alison.schofield@intel.com Signed-off-by: Dave Jiang

cxl/feature: Remove redundant code of get supported features

2025-05-19T15:58:04+00:00

In cxlctl_get_supported_features(), there is a code block that handles the case where the requested is equal to 0. But the code following the code block can also handle this situation. So the code block is not needed. Signed-off-by: Li Ming Reviewed-by: Jonathan Cameron Reviewed-by: Dave Jiang Link: https://patch.msgid.link/20250516143220.35302-1-ming.li@zohomail.com Signed-off-by: Dave Jiang

Documentation: Update the CXL Maturity Map

2025-05-15T23:34:26+00:00

Changes for extended-linear cache, hetero-interleave, and HPA->DPA address translation. Signed-off-by: Alison Schofield Reviewed-by: Dave Jiang Link: https://patch.msgid.link/20250512214225.1389484-1-alison.schofield@intel.com Signed-off-by: Dave Jiang