x86/pti: Fix section mismatch warning/error

rddunlap · KAGA-KOKO · commit ff924c5a1ec7 · 2018-09-02T11:24:41.000+02:00
Fix the section mismatch warning in arch/x86/mm/pti.c: WARNING: vmlinux.o(.text+0x6972a): Section mismatch in reference from the function pti_clone_pgtable() to the function .init.text:pti_user_pagetable_walk_pte() The function pti_clone_pgtable() references the function __init pti_user_pagetable_walk_pte(). This is often because pti_clone_pgtable lacks a __init annotation or the annotation of pti_user_pagetable_walk_pte is wrong. FATAL: modpost: Section mismatches detected. Fixes: 85900ea ("x86/pti: Map the vsyscall page if needed") Reported-by: kbuild test robot <lkp@intel.com> Signed-off-by: Randy Dunlap <rdunlap@infradead.org> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: Andy Lutomirski <luto@kernel.org> Link: https://lkml.kernel.org/r/43a6d6a3-d69d-5eda-da09-0b1c88215a2a@infradead.org
diff --git a/arch/x86/mm/pti.c b/arch/x86/mm/pti.c
@@ -248,7 +248,7 @@ static pmd_t *pti_user_pagetable_walk_pmd(unsigned long address)
  *
  * Returns a pointer to a PTE on success, or NULL on failure.
  */
-static __init pte_t *pti_user_pagetable_walk_pte(unsigned long address)
+static pte_t *pti_user_pagetable_walk_pte(unsigned long address)
 {
 	gfp_t gfp = (GFP_KERNEL | __GFP_NOTRACK | __GFP_ZERO);
 	pmd_t *pmd;

Original file line number	Diff line number	Diff line change
`@@ -248,7 +248,7 @@ static pmd_t *pti_user_pagetable_walk_pmd(unsigned long address)`
`248`	`248`	`*`
`249`	`249`	`* Returns a pointer to a PTE on success, or NULL on failure.`
`250`	`250`	`*/`
`251`		`-static __init pte_t *pti_user_pagetable_walk_pte(unsigned long address)`
	`251`	`+static pte_t *pti_user_pagetable_walk_pte(unsigned long address)`
`252`	`252`	`{`
`253`	`253`	`gfp_t gfp = (GFP_KERNEL \| __GFP_NOTRACK \| __GFP_ZERO);`
`254`	`254`	`pmd_t *pmd;`