From: Eric Biggers ebiggers@google.com

commit 9f35e33144ae5377d6a8de86dd3bd4d995c6ac65 upstream.

Fix several build errors when CONFIG_MODULES=n, including the following:

../arch/x86/kernel/alternative.c:195:25: error: incomplete definition of type 'struct module' 195 | for (int i = 0; i < mod->its_num_pages; i++) {

Fixes: 872df34d7c51 ("x86/its: Use dynamic thunks for indirect branches") Cc: stable@vger.kernel.org Signed-off-by: Eric Biggers ebiggers@google.com Acked-by: Dave Hansen dave.hansen@intel.com Tested-by: Steven Rostedt (Google) rostedt@goodmis.org Reviewed-by: Alexandre Chartre alexandre.chartre@oracle.com Signed-off-by: Linus Torvalds torvalds@linux-foundation.org Signed-off-by: Pawan Gupta pawan.kumar.gupta@linux.intel.com --- arch/x86/kernel/alternative.c | 6 ++++++ 1 file changed, 6 insertions(+)

diff --git a/arch/x86/kernel/alternative.c b/arch/x86/kernel/alternative.c index 6085919d3b3ebbf57b4c6f257eb30d0781569fe4..5a0b84e21285d16b7869b59c7d9e622a99c7ad7a 100644 --- a/arch/x86/kernel/alternative.c +++ b/arch/x86/kernel/alternative.c @@ -129,7 +129,9 @@ const unsigned char * const x86_nops[ASM_NOP_MAX+1] =

#ifdef CONFIG_MITIGATION_ITS

+#ifdef CONFIG_MODULES static struct module *its_mod; +#endif static void *its_page; static unsigned int its_offset;

@@ -150,6 +152,7 @@ static void *its_init_thunk(void *thunk, int reg) return thunk; }

+#ifdef CONFIG_MODULES void its_init_mod(struct module *mod) { if (!cpu_feature_enabled(X86_FEATURE_INDIRECT_THUNK_ITS)) @@ -188,6 +191,7 @@ void its_free_mod(struct module *mod) } kfree(mod->its_page_array); } +#endif /* CONFIG_MODULES */

DEFINE_FREE(its_execmem, void *, if (_T) module_memfree(_T));

@@ -198,6 +202,7 @@ static void *its_alloc(void) if (!page) return NULL;

+#ifdef CONFIG_MODULES if (its_mod) { void *tmp = krealloc(its_mod->its_page_array, (its_mod->its_num_pages+1) * sizeof(void *), @@ -208,6 +213,7 @@ static void *its_alloc(void) its_mod->its_page_array = tmp; its_mod->its_page_array[its_mod->its_num_pages++] = page; } +#endif /* CONFIG_MODULES */

return no_free_ptr(page); }

--- change-id: 20250513-its-fixes-6-6-990e444d4d67