[PATCH -tip 3/4] arm64: Cleanup in_exception_text() and move it in asm/sections.h

Masami Hiramatsu
2017-08-17T07:16:57Z

Cleanup in_exception_text() using memory_contains() and
move it in asm/sections.h from asm/trap.h because
section symbols and memory_contains() are defined in
asm/sections.h.

Signed-off-by: Masami Hiramatsu <mhiramat@kernel.org>
---
arch/arm64/include/asm/sections.h | 16 ++++++++++++++++
arch/arm64/include/asm/traps.h | 16 ----------------
2 files changed, 16 insertions(+), 16 deletions(-)

diff --git a/arch/arm64/include/asm/sections.h b/arch/arm64/include/asm/sections.h
index 941267caa39c..abaa8ac79eaf 100644
--- a/arch/arm64/include/asm/sections.h
+++ b/arch/arm64/include/asm/sections.h
@@ -29,4 +29,20 @@ extern char __inittext_begin[], __inittext_end[];
extern char __irqentry_text_start[], __irqentry_text_end[];
extern char __mmuoff_data_start[], __mmuoff_data_end[];

+/**
+ * in_exception_text - check if an address is in exception_text or
+ * irqentry_text
+ * @addr: virtual address to be checked
+ *
+ * Returns: true if the address specified by @addr is in the exception_text or
+ * irqentry_text, false otherwise.
+ */
+static inline bool in_exception_text(unsigned long addr)
+{
+ return memory_contains(__exception_text_start, __exception_text_end,
+ (void *)addr, 0) ||
+ memory_contains(__irqentry_text_start, __irqentry_text_end,
+ (void *)addr, 0);
+}
+
#endif /* __ASM_SECTIONS_H */
diff --git a/arch/arm64/include/asm/traps.h b/arch/arm64/include/asm/traps.h
index 47a9066f7c86..c3734c3e8115 100644
--- a/arch/arm64/include/asm/traps.h
+++ b/arch/arm64/include/asm/traps.h
@@ -37,20 +37,4 @@ void unregister_undef_hook(struct undef_hook *hook);

void arm64_notify_segfault(struct pt_regs *regs, unsigned long addr);

-static inline int __in_irqentry_text(unsigned long ptr)
-{
- return ptr >= (unsigned long)&__irqentry_text_start &&
- ptr < (unsigned long)&__irqentry_text_end;
-}
-
-static inline int in_exception_text(unsigned long ptr)
-{
- int in;
-
- in = ptr >= (unsigned long)&__exception_text_start &&
- ptr < (unsigned long)&__exception_text_end;
-
- return in ? : __in_irqentry_text(ptr);
-}
-
#endif