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x86/crash: Remove crash_reserve_low_1M()

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The entire memory range under 1M is unconditionally reserved in
setup_arch(), so there is no need for crash_reserve_low_1M() anymore.

Remove this function.

Signed-off-by: Mike Rapoport <rppt@linux.ibm.com>
Signed-off-by: Borislav Petkov <bp@suse.de>
Link: https://lkml.kernel.org/r/20210601075354.5149-4-rppt@kernel.org
This commit is contained in:
Mike Rapoport 2021-06-01 10:53:54 +03:00 committed by Borislav Petkov
parent 1a6a9044b9
commit 23721c8e92
2 changed files with 0 additions and 19 deletions
repo.diff.show_diff_stats Download patch file Download diff file Expand all files Collapse all files

6
arch/x86/include/asm/crash.h
View file

@ -9,10 +9,4 @@ int crash_setup_memmap_entries(struct kimage *image,
struct boot_params *params);
void crash_smp_send_stop(void);
#ifdef CONFIG_KEXEC_CORE
void __init crash_reserve_low_1M(void);
#else
static inline void __init crash_reserve_low_1M(void) { }
#endif
#endif /* _ASM_X86_CRASH_H */

13
arch/x86/kernel/crash.c
View file

@ -70,19 +70,6 @@ static inline void cpu_crash_vmclear_loaded_vmcss(void)
rcu_read_unlock();
}
/*
* When the crashkernel option is specified, only use the low
* 1M for the real mode trampoline.
*/
void __init crash_reserve_low_1M(void)
{
if (cmdline_find_option(boot_command_line, "crashkernel", NULL, 0) < 0)
return;
memblock_reserve(0, 1<<20);
pr_info("Reserving the low 1M of memory for crashkernel\n");
}
#if defined(CONFIG_SMP) && defined(CONFIG_X86_LOCAL_APIC)
static void kdump_nmi_callback(int cpu, struct pt_regs *regs)