1 // SPDX-License-Identifier: GPL-2.0 2 /* 3 * Data with an alignment stricter than its size. 4 * 5 * A cloned data section has to keep its sh_addralign. The kernel has plenty 6 * of data whose alignment is a correctness property rather than an 7 * optimisation -- per-CPU variables, anything touched by an aligned SSE move, 8 * cacheline-aligned locks -- and a clone that lands under-aligned faults or 9 * silently shares a cacheline it was written to avoid. 10 * 11 * The object is new in the patched build, so klp diff has to clone it rather 12 * than reference the kernel's copy. 13 */ 14 15 static const char __modinfo[] 16 __attribute__((section(".modinfo"), used, aligned(1))) = "\0name=vmlinux"; 17 18 #ifdef PATCHED 19 int aligned_data[2] __attribute__((aligned(64))) = { 1, 2 }; 20 #endif 21 22 int target(int x) 23 { 24 #ifdef PATCHED 25 return x + aligned_data[0]; 26 #else 27 return x; 28 #endif 29 } 30