The patch titled
Subject: x86: kexec_file: remove X86_64 dependency from prepare_elf64_headers()
has been added to the -mm tree. Its filename is
x86-kexec_file-remove-x86_64-dependency-from-prepare_elf64_headers.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/x86-kexec_file-remove-x86_64-dependency-from-prepare_elf64_headers.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/x86-kexec_file-remove-x86_64-dependency-from-prepare_elf64_headers.patch
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------------------------------------------------------
From: AKASHI Takahiro <takahiro.akashi@xxxxxxxxxx>
Subject: x86: kexec_file: remove X86_64 dependency from prepare_elf64_headers()
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.
Link: http://lkml.kernel.org/r/20180306102303.9063-5-takahiro.akashi@xxxxxxxxxx
Signed-off-by: AKASHI Takahiro <takahiro.akashi@xxxxxxxxxx>
Acked-by: Dave Young <dyoung@xxxxxxxxxx>
Tested-by: Dave Young <dyoung@xxxxxxxxxx>
Cc: Vivek Goyal <vgoyal@xxxxxxxxxx>
Cc: Baoquan He <bhe@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
arch/x86/kernel/crash.c | 24 ++++++++++++------------
1 file changed, 12 insertions(+), 12 deletions(-)
diff -puN arch/x86/kernel/crash.c~x86-kexec_file-remove-x86_64-dependency-from-prepare_elf64_headers arch/x86/kernel/crash.c
--- a/arch/x86/kernel/crash.c~x86-kexec_file-remove-x86_64-dependency-from-prepare_elf64_headers
+++ a/arch/x86/kernel/crash.c
@@ -347,7 +347,7 @@ static int prepare_elf64_ram_headers_cal
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
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 ki
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;
_
Patches currently in -mm which might be from takahiro.akashi@xxxxxxxxxx are
kexec_file-make-an-use-of-purgatory-optional.patch
kexec_file-make-an-use-of-purgatory-optional-fix.patch
kexec_filex86powerpc-factor-out-kexec_file_ops-functions.patch
x86-kexec_file-purge-system-ram-walking-from-prepare_elf64_headers.patch
x86-kexec_file-remove-x86_64-dependency-from-prepare_elf64_headers.patch
x86-kexec_file-lift-crash_max_ranges-limit-on-crash_mem-buffer.patch
x86-kexec_file-clean-up-prepare_elf64_headers.patch
kexec_file-x86-move-re-factored-code-to-generic-side.patch
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