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++) {
[ pawan: backport: Bring ITS dynamic thunk code under CONFIG_MODULES ]
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: Greg Kroah-Hartman gregkh@linuxfoundation.org Signed-off-by: Pawan Gupta pawan.kumar.gupta@linux.intel.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- arch/x86/kernel/alternative.c | 9 +++++++++ 1 file changed, 9 insertions(+)
diff --git a/arch/x86/kernel/alternative.c b/arch/x86/kernel/alternative.c index 33d17fe841828738ee248e3c2dbd2693ffd33672..923b4d1e98dbc378270e254960fcb7ce1bc3e665 100644 --- a/arch/x86/kernel/alternative.c +++ b/arch/x86/kernel/alternative.c @@ -554,6 +554,7 @@ static int emit_indirect(int op, int reg, u8 *bytes)
#ifdef CONFIG_MITIGATION_ITS
+#ifdef CONFIG_MODULES static struct module *its_mod; static void *its_page; static unsigned int its_offset; @@ -674,6 +675,14 @@ static void *its_allocate_thunk(int reg)
return thunk; } +#else /* CONFIG_MODULES */ + +static void *its_allocate_thunk(int reg) +{ + return NULL; +} + +#endif /* CONFIG_MODULES */
static int __emit_trampoline(void *addr, struct insn *insn, u8 *bytes, void *call_dest, void *jmp_dest)