diff options
Diffstat (limited to '0007-x86-crash-remove-crash_reserve_low_1M.patch')
| -rw-r--r-- | 0007-x86-crash-remove-crash_reserve_low_1M.patch | 58 |
1 files changed, 58 insertions, 0 deletions
diff --git a/0007-x86-crash-remove-crash_reserve_low_1M.patch b/0007-x86-crash-remove-crash_reserve_low_1M.patch new file mode 100644 index 000000000000..903e5fa0969a --- /dev/null +++ b/0007-x86-crash-remove-crash_reserve_low_1M.patch @@ -0,0 +1,58 @@ +From bb4c1200fdfd6c17fff64e159e625c3678342b87 Mon Sep 17 00:00:00 2001 +From: Mike Rapoport <rppt@linux.ibm.com> +Date: Tue, 1 Jun 2021 10:53:54 +0300 +Subject: [PATCH 7/8] x86/crash: remove crash_reserve_low_1M() + +The entire memory range under 1M is unconditionally reserved at +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> +--- + arch/x86/include/asm/crash.h | 6 ------ + arch/x86/kernel/crash.c | 13 ------------- + 2 files changed, 19 deletions(-) + +diff --git a/arch/x86/include/asm/crash.h b/arch/x86/include/asm/crash.h +index f58de66091e5..8b6bd63530dc 100644 +--- a/arch/x86/include/asm/crash.h ++++ b/arch/x86/include/asm/crash.h +@@ -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 */ +diff --git a/arch/x86/kernel/crash.c b/arch/x86/kernel/crash.c +index b1deacbeb266..e0b8d9662da5 100644 +--- a/arch/x86/kernel/crash.c ++++ b/arch/x86/kernel/crash.c +@@ -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) +-- +2.32.0 + |