* [PATCH 0/9] sections: Unify kernel sections range check and use
@ 2021-06-26 7:34 Kefeng Wang
2021-06-26 7:34 ` [PATCH 8/9] powerpc/mm: Use is_kernel_text() and is_kernel_inittext() helper Kefeng Wang
0 siblings, 1 reply; 2+ messages in thread
From: Kefeng Wang @ 2021-06-26 7:34 UTC (permalink / raw)
To: Arnd Bergmann, linux-arch, linux-kernel
Cc: linux-s390, Kefeng Wang, bpf, linuxppc-dev, iommu
There are three head files(kallsyms.h, kernel.h and sections.h) which
include the kernel sections range check, let's make some cleanup and
unify them.
1. cleanup arch specific text/data check and fix address boundary check in kallsyms.h
2. make all the basic kernel range check function into sections.h
3. update all the callers, and use the helper in sections.h to simplify the code
4. use memory_intersects() in sections.h instead of private overlap for dma-debug
Cc: linuxppc-dev@lists.ozlabs.org
Cc: linux-s390@vger.kernel.org
Cc: linux-arch@vger.kernel.org
Cc: iommu@lists.linux-foundation.org
Cc: bpf@vger.kernel.org
Kefeng Wang (9):
kallsyms: Remove arch specific text and data check
kallsyms: Fix address-checks for kernel related range
sections: Move and rename core_kernel_data() to is_kernel_data()
sections: Move is_kernel_inittext() into sections.h
kallsyms: Rename is_kernel() and is_kernel_text()
sections: Add new is_kernel() and is_kernel_text()
s390: kprobes: Use is_kernel() helper
powerpc/mm: Use is_kernel_text() and is_kernel_inittext() helper
dma-debug: Use memory_intersects() directly
arch/powerpc/mm/pgtable_32.c | 7 +---
arch/s390/kernel/kprobes.c | 9 +----
arch/x86/kernel/unwind_orc.c | 2 +-
arch/x86/net/bpf_jit_comp.c | 2 +-
include/asm-generic/sections.h | 71 ++++++++++++++++++++++++++--------
include/linux/kallsyms.h | 21 +++-------
include/linux/kernel.h | 2 -
kernel/cfi.c | 2 +-
kernel/dma/debug.c | 14 +------
kernel/extable.c | 33 ++--------------
kernel/locking/lockdep.c | 3 --
kernel/trace/ftrace.c | 2 +-
mm/kasan/report.c | 2 +-
net/sysctl_net.c | 2 +-
14 files changed, 76 insertions(+), 96 deletions(-)
--
2.26.2
^ permalink raw reply [flat|nested] 2+ messages in thread
* [PATCH 8/9] powerpc/mm: Use is_kernel_text() and is_kernel_inittext() helper
2021-06-26 7:34 [PATCH 0/9] sections: Unify kernel sections range check and use Kefeng Wang
@ 2021-06-26 7:34 ` Kefeng Wang
0 siblings, 0 replies; 2+ messages in thread
From: Kefeng Wang @ 2021-06-26 7:34 UTC (permalink / raw)
To: Arnd Bergmann, linux-arch, linux-kernel
Cc: Kefeng Wang, Paul Mackerras, linuxppc-dev
Use is_kernel_text() and is_kernel_inittext() helper to simplify code,
also drop etext, _stext, _sinittext, _einittext declaration which
already declared in section.h.
Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: linuxppc-dev@lists.ozlabs.org
Signed-off-by: Kefeng Wang <wangkefeng.wang@huawei.com>
---
arch/powerpc/mm/pgtable_32.c | 7 ++-----
1 file changed, 2 insertions(+), 5 deletions(-)
diff --git a/arch/powerpc/mm/pgtable_32.c b/arch/powerpc/mm/pgtable_32.c
index dcf5ecca19d9..13c798308c2e 100644
--- a/arch/powerpc/mm/pgtable_32.c
+++ b/arch/powerpc/mm/pgtable_32.c
@@ -33,8 +33,6 @@
#include <mm/mmu_decl.h>
-extern char etext[], _stext[], _sinittext[], _einittext[];
-
static u8 early_fixmap_pagetable[FIXMAP_PTE_SIZE] __page_aligned_data;
notrace void __init early_ioremap_init(void)
@@ -104,14 +102,13 @@ static void __init __mapin_ram_chunk(unsigned long offset, unsigned long top)
{
unsigned long v, s;
phys_addr_t p;
- int ktext;
+ bool ktext;
s = offset;
v = PAGE_OFFSET + s;
p = memstart_addr + s;
for (; s < top; s += PAGE_SIZE) {
- ktext = ((char *)v >= _stext && (char *)v < etext) ||
- ((char *)v >= _sinittext && (char *)v < _einittext);
+ ktext = (is_kernel_text(v) || is_kernel_inittext(v));
map_kernel_page(v, p, ktext ? PAGE_KERNEL_TEXT : PAGE_KERNEL);
v += PAGE_SIZE;
p += PAGE_SIZE;
--
2.26.2
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