[PATCH RESEND 3/4] kexec: replace crash_mem_range with range

Baoquan He
2022-09-29T04:30:24Z

From: Li Chen <lchen@ambarella.com>

We already have struct range, so just use it.

Signed-off-by: Li Chen <lchen@ambarella.com>
Acked-by: Baoquan He <bhe@redhat.com>
Signed-off-by: Baoquan He <bhe@redhat.com>
Cc: linuxppc-dev <linuxppc-dev@lists.ozlabs.org>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Paul Mackerras <paulus@samba.org>
---
Baoquan:
- Rebased to the latest linus's master branch, fix the conflict
in include/linux/kexec.h.
- Test passed on ibm-p9wr ppc64le system.

arch/powerpc/kexec/file_load_64.c | 2 +-
arch/powerpc/kexec/ranges.c | 8 ++++----
include/linux/kexec.h | 7 ++-----
kernel/kexec_file.c | 2 +-
4 files changed, 8 insertions(+), 11 deletions(-)

diff --git a/arch/powerpc/kexec/file_load_64.c b/arch/powerpc/kexec/file_load_64.c
index 349a781cea0b..60e12b716d3c 100644
--- a/arch/powerpc/kexec/file_load_64.c
+++ b/arch/powerpc/kexec/file_load_64.c
@@ -35,7 +35,7 @@ struct umem_info {

/* usable memory ranges to look up */
unsigned int nr_ranges;
- const struct crash_mem_range *ranges;
+ const struct range *ranges;
};

const struct kexec_file_ops * const kexec_file_loaders[] = {
diff --git a/arch/powerpc/kexec/ranges.c b/arch/powerpc/kexec/ranges.c
index 563e9989a5bf..5fc53a5fcfdf 100644
--- a/arch/powerpc/kexec/ranges.c
+++ b/arch/powerpc/kexec/ranges.c
@@ -33,7 +33,7 @@
static inline unsigned int get_max_nr_ranges(size_t size)
{
return ((size - sizeof(struct crash_mem)) /
- sizeof(struct crash_mem_range));
+ sizeof(struct range));
}

/**
@@ -51,7 +51,7 @@ static inline size_t get_mem_rngs_size(struct crash_mem *mem_rngs)
return 0;

size = (sizeof(struct crash_mem) +
- (mem_rngs->max_nr_ranges * sizeof(struct crash_mem_range)));
+ (mem_rngs->max_nr_ranges * sizeof(struct range)));

/*
* Memory is allocated in size multiple of MEM_RANGE_CHUNK_SZ.
@@ -98,7 +98,7 @@ static int __add_mem_range(struct crash_mem **mem_ranges, u64 base, u64 size)
*/
static void __merge_memory_ranges(struct crash_mem *mem_rngs)
{
- struct crash_mem_range *ranges;
+ struct range *ranges;
int i, idx;

if (!mem_rngs)
@@ -123,7 +123,7 @@ static void __merge_memory_ranges(struct crash_mem *mem_rngs)
/* cmp_func_t callback to sort ranges with sort() */
static int rngcmp(const void *_x, const void *_y)
{
- const struct crash_mem_range *x = _x, *y = _y;
+ const struct range *x = _x, *y = _y;

if (x->start > y->start)
return 1;
diff --git a/include/linux/kexec.h b/include/linux/kexec.h
index 13e6c4b58f07..b900311b4f87 100644
--- a/include/linux/kexec.h
+++ b/include/linux/kexec.h
@@ -17,6 +17,7 @@

#include <linux/crash_core.h>
#include <asm/io.h>
+#include <linux/range.h>

#include <uapi/linux/kexec.h>
#include <linux/verification.h>
@@ -240,14 +241,10 @@ static inline int arch_kexec_locate_mem_hole(struct kexec_buf *kbuf)
/* Alignment required for elf header segment */
#define ELF_CORE_HEADER_ALIGN 4096

-struct crash_mem_range {
- u64 start, end;
-};
-
struct crash_mem {
unsigned int max_nr_ranges;
unsigned int nr_ranges;
- struct crash_mem_range ranges[];
+ struct range ranges[];
};

extern int crash_exclude_mem_range(struct crash_mem *mem,
diff --git a/kernel/kexec_file.c b/kernel/kexec_file.c
index 1d546dc97c50..22df37ca5143 100644
--- a/kernel/kexec_file.c
+++ b/kernel/kexec_file.c
@@ -1141,7 +1141,7 @@ int crash_exclude_mem_range(struct crash_mem *mem,
{
int i, j;
unsigned long long start, end, p_start, p_end;
- struct crash_mem_range temp_range = {0, 0};
+ struct range temp_range = {0, 0};

for (i = 0; i < mem->nr_ranges; i++) {
start = mem->ranges[i].start;
--
2.34.1