If CONFIG_JUMP_LABEL=y and CONFIG_MMU=n:
arch/arm/kernel/patch.c: In function 'patch_map':
arch/arm/kernel/patch.c:39:129: error: 'L_PTE_YOUNG' undeclared (first use
in this function)
set_fixmap(fixmap, page_to_phys(page));
^
arch/arm/kernel/patch.c:39:129: note: each undeclared identifier is
reported only once for each function it appears in
arch/arm/kernel/patch.c:39:143: error: 'L_PTE_PRESENT' undeclared (first
use in this function)
set_fixmap(fixmap, page_to_phys(page));
^
arch/arm/kernel/patch.c:39:159: error: 'L_PTE_XN' undeclared (first use in
this function)
set_fixmap(fixmap, page_to_phys(page));
^
arch/arm/kernel/patch.c:39:170: error: 'L_PTE_DIRTY' undeclared (first use
in this function)
set_fixmap(fixmap, page_to_phys(page));
^
arch/arm/kernel/patch.c:39:185: error: 'L_PTE_MT_WRITEBACK' undeclared
(first use in this function)
set_fixmap(fixmap, page_to_phys(page));
^
Protect the calls to set_fixmap() and clear_fixmap() by #ifdef
CONFIG_MMU to fix this.
Fixes: commit ab0615e2d6fb0747 ("arm: use fixmap for text patching when text is
RO")
Signed-off-by: Geert Uytterhoeven <[email protected]>
---
http://kisskb.ellerman.id.au/kisskb/buildresult/12531538/
arch/arm/kernel/patch.c | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/arch/arm/kernel/patch.c b/arch/arm/kernel/patch.c
index 69bda1a5707ee826..447b53a68be5bd6f 100644
--- a/arch/arm/kernel/patch.c
+++ b/arch/arm/kernel/patch.c
@@ -36,7 +36,9 @@ static void __kprobes *patch_map(void *addr, int fixmap,
unsigned long *flags)
else
__acquire(&patch_lock);
+#ifdef CONFIG_MMU
set_fixmap(fixmap, page_to_phys(page));
+#endif
return (void *) (__fix_to_virt(fixmap) + (uintaddr & ~PAGE_MASK));
}
@@ -44,7 +46,9 @@ static void __kprobes *patch_map(void *addr, int fixmap,
unsigned long *flags)
static void __kprobes patch_unmap(int fixmap, unsigned long *flags)
__releases(&patch_lock)
{
+#ifdef CONFIG_MMU
clear_fixmap(fixmap);
+#endif
if (flags)
spin_unlock_irqrestore(&patch_lock, *flags);
--
1.9.1
--
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