The code guarded by CONFIG_X86_64 is necessary on some architectures
which have a dedicated kernel mapping outside of linear memory mapping.
(arm64 is among those.)
In this patch, an additional argument, kernel_map, is added to enable/
disable the code removing #ifdef.
Signed-off-by: AKASHI Takahiro <takahiro.aka...@linaro.org>
Cc: Dave Young <dyo...@redhat.com>
Cc: Vivek Goyal <vgo...@redhat.com>
Cc: Baoquan He <b...@redhat.com>
---
arch/x86/kernel/crash.c | 24 ++++++++++++------------
1 file changed, 12 insertions(+), 12 deletions(-)
diff --git a/arch/x86/kernel/crash.c b/arch/x86/kernel/crash.c
index 2123fa0efc17..b328153cee65 100644
--- a/arch/x86/kernel/crash.c
+++ b/arch/x86/kernel/crash.c
@@ -347,7 +347,7 @@ static int prepare_elf64_ram_headers_callback(struct
resource *res, void *arg)
return 0;
}
-static int prepare_elf64_headers(struct crash_elf_data *ced,
+static int prepare_elf64_headers(struct crash_elf_data *ced, bool kernel_map,
void **addr, unsigned long *sz)
{
Elf64_Ehdr *ehdr;
@@ -414,17 +414,17 @@ static int prepare_elf64_headers(struct crash_elf_data
*ced,
phdr->p_filesz = phdr->p_memsz = VMCOREINFO_NOTE_SIZE;
(ehdr->e_phnum)++;
-#ifdef CONFIG_X86_64
/* Prepare PT_LOAD type program header for kernel text region */
- phdr = (Elf64_Phdr *)bufp;
- bufp += sizeof(Elf64_Phdr);
- phdr->p_type = PT_LOAD;
- phdr->p_flags = PF_R|PF_W|PF_X;
- phdr->p_vaddr = (Elf64_Addr)_text;
- phdr->p_filesz = phdr->p_memsz = _end - _text;
- phdr->p_offset = phdr->p_paddr = __pa_symbol(_text);
- (ehdr->e_phnum)++;
-#endif
+ if (kernel_map) {
+ phdr = (Elf64_Phdr *)bufp;
+ bufp += sizeof(Elf64_Phdr);
+ phdr->p_type = PT_LOAD;
+ phdr->p_flags = PF_R|PF_W|PF_X;
+ phdr->p_vaddr = (Elf64_Addr)_text;
+ phdr->p_filesz = phdr->p_memsz = _end - _text;
+ phdr->p_offset = phdr->p_paddr = __pa_symbol(_text);
+ (ehdr->e_phnum)++;
+ }
/* Go through all the ranges in cmem->ranges[] and prepare phdr */
for (i = 0; i < cmem->nr_ranges; i++) {
@@ -477,7 +477,7 @@ static int prepare_elf_headers(struct kimage *image, void
**addr,
goto out;
/* By default prepare 64bit headers */
- ret = prepare_elf64_headers(ced, addr, sz);
+ ret = prepare_elf64_headers(ced, IS_ENABLED(CONFIG_X86_64), addr, sz);
if (ret)
goto out;
--
2.16.2
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