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x86/its: Fix build errors when CONFIG_MODULES=n

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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: Pawan Gupta <pawan.kumar.gupta@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Eric Biggers
2025-06-17 17:47:56 -07:00
committed by Greg Kroah-Hartman
parent ac1b649e46
commit 31967b4481
1 changed files with 9 additions and 0 deletions
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9
arch/x86/kernel/alternative.c
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@@ -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)