The patch titled
Subject: sections: provide internal __is_kernel() and __is_kernel_text() helper
has been added to the -mm tree. Its filename is
sections-provide-internal-__is_kernel-and-__is_kernel_text-helper.patch
This patch should soon appear at
https://ozlabs.org/~akpm/mmots/broken-out/sections-provide-internal-__is_kernel-and-__is_kernel_text-helper.patch
and later at
https://ozlabs.org/~akpm/mmotm/broken-out/sections-provide-internal-__is_kernel-and-__is_kernel_text-helper.patch
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------------------------------------------------------
From: Kefeng Wang <wangkefeng.wang@xxxxxxxxxx>
Subject: sections: provide internal __is_kernel() and __is_kernel_text() helper
An internal __is_kernel() helper which only check the kernel address
ranges, and an internal __is_kernel_text() helper which only check text
section ranges.
Link: https://lkml.kernel.org/r/20210930071143.63410-7-wangkefeng.wang@xxxxxxxxxx
Signed-off-by: Kefeng Wang <wangkefeng.wang@xxxxxxxxxx>
Cc: Alexander Potapenko <glider@xxxxxxxxxx>
Cc: Alexei Starovoitov <ast@xxxxxxxxxx>
Cc: Andrey Konovalov <andreyknvl@xxxxxxxxx>
Cc: Andrey Ryabinin <ryabinin.a.a@xxxxxxxxx>
Cc: Arnd Bergmann <arnd@xxxxxxxx>
Cc: Benjamin Herrenschmidt <benh@xxxxxxxxxxxxxxxxxxx>
Cc: Borislav Petkov <bp@xxxxxxxxx>
Cc: Christophe Leroy <christophe.leroy@xxxxxxxxxx>
Cc: "David S. Miller" <davem@xxxxxxxxxxxxx>
Cc: Dmitry Vyukov <dvyukov@xxxxxxxxxx>
Cc: Ingo Molnar <mingo@xxxxxxxxxx>
Cc: Ivan Kokshaysky <ink@xxxxxxxxxxxxxxxxxxxx>
Cc: Matt Turner <mattst88@xxxxxxxxx>
Cc: Michael Ellerman <mpe@xxxxxxxxxxxxxx>
Cc: Michal Simek <monstr@xxxxxxxxx>
Cc: Paul Mackerras <paulus@xxxxxxxxx>
Cc: Petr Mladek <pmladek@xxxxxxxx>
Cc: Richard Henderson <rth@xxxxxxxxxxx>
Cc: Sergey Senozhatsky <senozhatsky@xxxxxxxxxxxx>
Cc: Steven Rostedt <rostedt@xxxxxxxxxxx>
Cc: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
include/asm-generic/sections.h | 29 +++++++++++++++++++++++++++++
include/linux/kallsyms.h | 4 ++--
2 files changed, 31 insertions(+), 2 deletions(-)
--- a/include/asm-generic/sections.h~sections-provide-internal-__is_kernel-and-__is_kernel_text-helper
+++ a/include/asm-generic/sections.h
@@ -172,4 +172,33 @@ static inline bool is_kernel_inittext(un
addr < (unsigned long)_einittext;
}
+/**
+ * __is_kernel_text - checks if the pointer address is located in the
+ * .text section
+ *
+ * @addr: address to check
+ *
+ * Returns: true if the address is located in .text, false otherwise.
+ * Note: an internal helper, only check the range of _stext to _etext.
+ */
+static inline bool __is_kernel_text(unsigned long addr)
+{
+ return addr >= (unsigned long)_stext &&
+ addr < (unsigned long)_etext;
+}
+
+/**
+ * __is_kernel - checks if the pointer address is located in the kernel range
+ *
+ * @addr: address to check
+ *
+ * Returns: true if the address is located in the kernel range, false otherwise.
+ * Note: an internal helper, only check the range of _stext to _end.
+ */
+static inline bool __is_kernel(unsigned long addr)
+{
+ return addr >= (unsigned long)_stext &&
+ addr < (unsigned long)_end;
+}
+
#endif /* _ASM_GENERIC_SECTIONS_H_ */
--- a/include/linux/kallsyms.h~sections-provide-internal-__is_kernel-and-__is_kernel_text-helper
+++ a/include/linux/kallsyms.h
@@ -26,14 +26,14 @@ struct module;
static inline int is_kernel_text(unsigned long addr)
{
- if ((addr >= (unsigned long)_stext && addr < (unsigned long)_etext))
+ if (__is_kernel_text(addr))
return 1;
return in_gate_area_no_mm(addr);
}
static inline int is_kernel(unsigned long addr)
{
- if (addr >= (unsigned long)_stext && addr < (unsigned long)_end)
+ if (__is_kernel(addr))
return 1;
return in_gate_area_no_mm(addr);
}
_
Patches currently in -mm which might be from wangkefeng.wang@xxxxxxxxxx are
slub-add-back-check-for-free-nonslab-objects.patch
mm-nommu-kill-arch_get_unmapped_area.patch
kallsyms-remove-arch-specific-text-and-data-check.patch
kallsyms-fix-address-checks-for-kernel-related-range.patch
sections-move-and-rename-core_kernel_data-to-is_kernel_core_data.patch
sections-move-is_kernel_inittext-into-sectionsh.patch
x86-mm-rename-__is_kernel_text-to-is_x86_32_kernel_text.patch
sections-provide-internal-__is_kernel-and-__is_kernel_text-helper.patch
mm-kasan-use-is_kernel-helper.patch
extable-use-is_kernel_text-helper.patch
powerpc-mm-use-core_kernel_text-helper.patch
microblaze-use-is_kernel_text-helper.patch
alpha-use-is_kernel_text-helper.patch
