user/sven/linux.git/include/linux/cpumask.h, branch v6.16.5

Merge tag 'bitmap-for-6.16-rc1' of https://github.com/norov/linux

2025-06-03T14:39:23Z

Pull bitmap updates from Yury Norov: - dead code cleanups for cpumasks and nodemasks (me) - fixed-width flavors of GENMASK() and BIT() (Vincent, Lucas and me) - FIELD_MODIFY() helper (Luo) - for_each_node_with_cpus() optimization (me) - bitmap-str fixes (Andy) * tag 'bitmap-for-6.16-rc1' of https://github.com/norov/linux: topology: make for_each_node_with_cpus() O(N) bitfield: Add FIELD_MODIFY() helper bitmap-str: Add missing header(s) bitmap-str: Get rid of 'extern' for function prototypes build_bug.h: more user friendly error messages in BUILD_BUG_ON_ZERO() test_bits: add tests for BIT_U*() test_bits: add tests for GENMASK_U*() drm/i915: Convert REG_GENMASK*() to fixed-width GENMASK_U*() bits: introduce fixed-type BIT_U*() bits: introduce fixed-type GENMASK_U*() bits: add comments and newlines to #if, #else and #endif directives cpumask: drop cpumask_assign_cpu() riscv: switch set_icache_stale_mask() to using non-atomic assign_cpu() cpumask: add non-atomic __assign_cpu() nodemask: drop nodes_shift

cpumask: Add cpumask_{first,next}_andnot() API

2025-05-15T18:28:12Z

With the lack of the functions, client code has to abuse less efficient cpumask_nth(). Signed-off-by: Yury Norov [NVIDIA] Signed-off-by: James Morse Signed-off-by: Borislav Petkov (AMD) Reviewed-by: James Morse Reviewed-by: Reinette Chatre Reviewed-by: Fenghua Yu Tested-by: Fenghua Yu Tested-by: James Morse Tested-by: Tony Luck Link: https://lore.kernel.org/20250515165855.31452-4-james.morse@arm.com

cpumask: Relax cpumask_any_but()

2025-05-15T18:24:22Z

Similarly to other cpumask search functions, accept -1, and consider it as 'any CPU' hint. This helps users to avoid coding special cases. Signed-off-by: Yury Norov [NVIDIA] Signed-off-by: James Morse Signed-off-by: Borislav Petkov (AMD) Reviewed-by: James Morse Reviewed-by: Reinette Chatre Reviewed-by: Fenghua Yu Tested-by: James Morse Tested-by: Tony Luck Tested-by: Fenghua Yu Link: https://lore.kernel.org/20250515165855.31452-2-james.morse@arm.com

cpumask: drop cpumask_assign_cpu()

2025-04-29T19:58:38Z

Commit decde1fa209323c7 ("cpumask: Add assign cpu") was merged bypassing cpumasks reviewers. It adds atomic and non-atomic cpumask_assign_cpu() helpers. In the same merge window, commit 5c563ee90a22d3 ("cpumask: introduce assign_cpu() macro") added the same functionality. So now we have it duplicated. __cpumask_assign_cpu() has never been used since introducing, and because this series reworks the only user of cpumask_assign_cpu(), both functions become a dead code. Signed-off-by: Yury Norov [NVIDIA]

cpumask: add non-atomic __assign_cpu()

2025-04-29T19:58:37Z

Similarly to atomic, add a non-atomic version. Signed-off-by: Yury Norov [NVIDIA]

cpumask: align text in comment

2025-03-20T21:33:31Z

Since commit 4e1a7df45480 ("cpumask: Add enabled cpumask for present CPUs that can be brought online") introduced cpu_enabled_mask, the comment line describing the mask has been slightly out of alignment with the adjacent lines. Fix this by removing a single space character. Signed-off-by: Joel Savitz Signed-off-by: Yury Norov

cpumask: drop cpumask_next_wrap_old()

2025-02-24T21:37:23Z

Now that we have cpumask_next_wrap() wired to generic find_next_bit_wrap(), the old implementation is not needed. Signed-off-by: Yury Norov

cpumask: re-introduce cpumask_next{,_and}_wrap()

2025-02-24T21:37:22Z

cpumask_next_wrap_old() has two additional parameters, comparing to its generic counterpart find_next_bit_wrap(). The reason for that is historical. Before 4fe49b3b97c262 ("lib/bitmap: introduce for_each_set_bit_wrap() macro"), cpumask_next_wrap() was used to implement for_each_cpu_wrap() iterator. Now that the iterator is an alias to generic for_each_set_bit_wrap(), the additional parameters aren't used and may confuse readers. All existing users call cpumask_next_wrap() in a way that makes it possible to turn it to straight and simple alias to find_next_bit_wrap(). In a couple of places kernel users opencode missing cpumask_next_and_wrap(). Add it as well. CC: Alexander Gordeev CC: Bjorn Helgaas Signed-off-by: Yury Norov

cpumask: deprecate cpumask_next_wrap()

2025-02-24T21:37:22Z

The next patch aligns implementation of cpumask_next_wrap() with the find_next_bit_wrap(), and it changes function signature. To make the transition smooth, this patch deprecates current implementation by adding an _old suffix. The following patches switch current users to the new implementation one by one. No functional changes were intended. Signed-off-by: Yury Norov

cpumask: add for_each_{possible,online}_cpu_wrap

2025-02-18T16:51:22Z

The iterators are trivial extensions of for_each_cpu_wrap(). They are used in the following patches of the series to replace cpumask_next_wrap(). Signed-off-by: Yury Norov