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sparc: Replace one-element array with flexible array member

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Replace the deprecated one-element array with a modern flexible array
member in the struct hvtramp_descr.

Additionally, 15 unnecessary bytes were allocated for hdesc, but instead
of fixing the parentheses in the open-coded version, use struct_size()
to calculate the correct number of bytes.

Link: https://github.com/KSPP/linux/issues/79
Signed-off-by: Thorsten Blum <thorsten.blum@linux.dev>
Fixes: 64658743fd ("[SPARC64]: Remove most limitations to kernel image size.")
Reviewed-by: Andreas Larsson <andreas@gaisler.com>
Link: https://lore.kernel.org/r/20241111204724.165263-2-thorsten.blum@linux.dev
Signed-off-by: Andreas Larsson <andreas@gaisler.com>
This commit is contained in:
Thorsten Blum 2024-11-11 21:47:21 +01:00 committed by Andreas Larsson
parent f6dee26d26
commit 8467d8b282
2 changed files with 2 additions and 4 deletions
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2
arch/sparc/include/asm/hvtramp.h
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@ -17,7 +17,7 @@ struct hvtramp_descr {
__u64 fault_info_va;
__u64 fault_info_pa;
__u64 thread_reg;
struct hvtramp_mapping maps[1];
struct hvtramp_mapping maps[];
};
void hv_cpu_startup(unsigned long hvdescr_pa);

4
arch/sparc/kernel/smp_64.c
View File

@ -297,9 +297,7 @@ static void ldom_startcpu_cpuid(unsigned int cpu, unsigned long thread_reg,
unsigned long hv_err;
int i;
hdesc = kzalloc(sizeof(*hdesc) +
(sizeof(struct hvtramp_mapping) *
num_kernel_image_mappings - 1),
hdesc = kzalloc(struct_size(hdesc, maps, num_kernel_image_mappings),
GFP_KERNEL);
if (!hdesc) {
printk(KERN_ERR "ldom_startcpu_cpuid: Cannot allocate "