[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [PATCH] x86: fix UP build with gcc14
The complaint is: In file included from ././include/xen/config.h:17, from <command-line>: arch/x86/smpboot.c: In function ‘link_thread_siblings.constprop’: ./include/asm-generic/percpu.h:16:51: error: array subscript [0, 0] is outside array bounds of ‘long unsigned int[1]’ [-Werror=array-bounds=] 16 | (*RELOC_HIDE(&per_cpu__##var, __per_cpu_offset[cpu])) ./include/xen/compiler.h:140:29: note: in definition of macro ‘RELOC_HIDE’ 140 | (typeof(ptr)) (__ptr + (off)); }) | ^~~ arch/x86/smpboot.c:238:27: note: in expansion of macro ‘per_cpu’ 238 | cpumask_set_cpu(cpu2, per_cpu(cpu_sibling_mask, cpu1)); | ^~~~~~~ In file included from ./arch/x86/include/generated/asm/percpu.h:1, from ./include/xen/percpu.h:30, from ./arch/x86/include/asm/cpuid.h:9, from ./arch/x86/include/asm/cpufeature.h:11, from ./arch/x86/include/asm/system.h:6, from ./include/xen/list.h:11, from ./include/xen/mm.h:68, from arch/x86/smpboot.c:12: ./include/asm-generic/percpu.h:12:22: note: while referencing ‘__per_cpu_offset’ 12 | extern unsigned long __per_cpu_offset[NR_CPUS]; | ^~~~~~~~~~~~~~~~ Which I consider bogus in the first place ("array subscript [0, 0]" vs a 1-element array). Yet taking the experience from 99f942f3d410 ("Arm64: adjust __irq_to_desc() to fix build with gcc14") I guessed that switching function parameters to unsigned int (which they should have been anyway) might help. And voilà ... Signed-off-by: Jan Beulich <jbeulich@xxxxxxxx> --- a/xen/arch/x86/smpboot.c +++ b/xen/arch/x86/smpboot.c @@ -226,7 +226,7 @@ static int booting_cpu; /* CPUs for which sibling maps can be computed. */ static cpumask_t cpu_sibling_setup_map; -static void link_thread_siblings(int cpu1, int cpu2) +static void link_thread_siblings(unsigned int cpu1, unsigned int cpu2) { cpumask_set_cpu(cpu1, per_cpu(cpu_sibling_mask, cpu2)); cpumask_set_cpu(cpu2, per_cpu(cpu_sibling_mask, cpu1));
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