| Age | Commit message (Collapse) | Author | |
|---|---|---|---|
| 2026-07-29 | s390/runtime-const: Introduce runtime_const_mask_32() | K Prateek Nayak | |
| Futex hash computation requires a mask operation with read-only after init data that will be converted to a runtime constant in the subsequent commit. Introduce runtime_const_mask_32 to further optimize the mask operation in the futex hash computation hot path. GCC generates a: nilf %r1,<imm32> to tackle arbitrary 32-bit masks and the same is implemented here. Immediate patching pattern for __runtime_fixup_mask() has been adopted from __runtime_fixup_ptr(). Signed-off-by: K Prateek Nayak <kprateek.nayak@amd.com> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Acked-by: Heiko Carstens <hca@linux.ibm.com> Link: https://patch.msgid.link/20260728052540.4728-7-kprateek.nayak@amd.com | |||
| 2024-07-23 | s390: Add runtime constant support | Heiko Carstens | |
| Implement the runtime constant infrastructure for s390, allowing the dcache d_hash() function to be generated using as a constant for hash table address followed by shift by a constant of the hash index. This is the s390 variant of commit 94a2bc0f611c ("arm64: add 'runtime constant' support") and commit e3c92e81711d ("runtime constants: add x86 architecture support"). Signed-off-by: Heiko Carstens <hca@linux.ibm.com> Acked-by: Vasily Gorbik <gor@linux.ibm.com> Signed-off-by: Vasily Gorbik <gor@linux.ibm.com> | |||
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