diff options
| -rw-r--r-- | arch/i386/kernel/crash.c | 5 | ||||
| -rw-r--r-- | arch/ppc/kernel/machine_kexec.c | 6 | ||||
| -rw-r--r-- | arch/s390/kernel/crash.c | 2 | ||||
| -rw-r--r-- | arch/x86_64/kernel/crash.c | 2 | ||||
| -rw-r--r-- | include/asm-i386/kexec.h | 3 | ||||
| -rw-r--r-- | include/asm-powerpc/kexec.h | 3 | ||||
| -rw-r--r-- | include/asm-s390/kexec.h | 3 | ||||
| -rw-r--r-- | include/asm-x86_64/kexec.h | 3 | ||||
| -rw-r--r-- | include/linux/kexec.h | 2 | ||||
| -rw-r--r-- | kernel/kexec.c | 16 |
10 files changed, 21 insertions, 24 deletions
diff --git a/arch/i386/kernel/crash.c b/arch/i386/kernel/crash.c index 10fe656..f1e65c2 100644 --- a/arch/i386/kernel/crash.c +++ b/arch/i386/kernel/crash.c @@ -25,7 +25,6 @@ #include <mach_ipi.h> -note_buf_t crash_notes[NR_CPUS]; /* This keeps a track of which one is crashing cpu. */ static int crashing_cpu; @@ -72,7 +71,9 @@ static void crash_save_this_cpu(struct pt_regs *regs, int cpu) * squirrelled away. ELF notes happen to provide * all of that that no need to invent something new. */ - buf = &crash_notes[cpu][0]; + buf = (u32*)per_cpu_ptr(crash_notes, cpu); + if (!buf) + return; memset(&prstatus, 0, sizeof(prstatus)); prstatus.pr_pid = current->pid; elf_core_copy_regs(&prstatus.pr_reg, regs); diff --git a/arch/ppc/kernel/machine_kexec.c b/arch/ppc/kernel/machine_kexec.c index a882b0d..84d65a8 100644 --- a/arch/ppc/kernel/machine_kexec.c +++ b/arch/ppc/kernel/machine_kexec.c @@ -28,12 +28,6 @@ typedef NORET_TYPE void (*relocate_new_kernel_t)( const extern unsigned char relocate_new_kernel[]; const extern unsigned int relocate_new_kernel_size; -/* - * Provide a dummy crash_notes definition while crash dump arrives to ppc. - * This prevents breakage of crash_notes attribute in kernel/ksysfs.c. - */ -note_buf_t crash_notes[NR_CPUS]; - void machine_shutdown(void) { if (ppc_md.machine_shutdown) diff --git a/arch/s390/kernel/crash.c b/arch/s390/kernel/crash.c index 7bd169c..926ccee 100644 --- a/arch/s390/kernel/crash.c +++ b/arch/s390/kernel/crash.c @@ -10,8 +10,6 @@ #include <linux/threads.h> #include <linux/kexec.h> -note_buf_t crash_notes[NR_CPUS]; - void machine_crash_shutdown(struct pt_regs *regs) { } diff --git a/arch/x86_64/kernel/crash.c b/arch/x86_64/kernel/crash.c index 535e044..efe4507 100644 --- a/arch/x86_64/kernel/crash.c +++ b/arch/x86_64/kernel/crash.c @@ -19,8 +19,6 @@ #include <asm/nmi.h> #include <asm/hw_irq.h> -note_buf_t crash_notes[NR_CPUS]; - void machine_crash_shutdown(struct pt_regs *regs) { /* This function is only called after the system diff --git a/include/asm-i386/kexec.h b/include/asm-i386/kexec.h index 6ed2a03..d80d446 100644 --- a/include/asm-i386/kexec.h +++ b/include/asm-i386/kexec.h @@ -26,8 +26,5 @@ #define KEXEC_ARCH KEXEC_ARCH_386 #define MAX_NOTE_BYTES 1024 -typedef u32 note_buf_t[MAX_NOTE_BYTES/4]; - -extern note_buf_t crash_notes[]; #endif /* _I386_KEXEC_H */ diff --git a/include/asm-powerpc/kexec.h b/include/asm-powerpc/kexec.h index 4263af3..e363752 100644 --- a/include/asm-powerpc/kexec.h +++ b/include/asm-powerpc/kexec.h @@ -38,9 +38,6 @@ #ifdef CONFIG_KEXEC #define MAX_NOTE_BYTES 1024 -typedef u32 note_buf_t[MAX_NOTE_BYTES / sizeof(u32)]; - -extern note_buf_t crash_notes[]; #ifdef __powerpc64__ extern void kexec_smp_wait(void); /* get and clear naca physid, wait for diff --git a/include/asm-s390/kexec.h b/include/asm-s390/kexec.h index 54cf7d9..b4809d9 100644 --- a/include/asm-s390/kexec.h +++ b/include/asm-s390/kexec.h @@ -35,8 +35,5 @@ #define KEXEC_ARCH KEXEC_ARCH_S390 #define MAX_NOTE_BYTES 1024 -typedef u32 note_buf_t[MAX_NOTE_BYTES/4]; - -extern note_buf_t crash_notes[]; #endif /*_S390_KEXEC_H */ diff --git a/include/asm-x86_64/kexec.h b/include/asm-x86_64/kexec.h index 42d2ff1..cea7854 100644 --- a/include/asm-x86_64/kexec.h +++ b/include/asm-x86_64/kexec.h @@ -26,8 +26,5 @@ #define KEXEC_ARCH KEXEC_ARCH_X86_64 #define MAX_NOTE_BYTES 1024 -typedef u32 note_buf_t[MAX_NOTE_BYTES/4]; - -extern note_buf_t crash_notes[]; #endif /* _X86_64_KEXEC_H */ diff --git a/include/linux/kexec.h b/include/linux/kexec.h index c846847..c1cd9b3 100644 --- a/include/linux/kexec.h +++ b/include/linux/kexec.h @@ -125,6 +125,8 @@ extern struct kimage *kexec_image; /* Location of a reserved region to hold the crash kernel. */ extern struct resource crashk_res; +typedef u32 note_buf_t[MAX_NOTE_BYTES/4]; +extern note_buf_t *crash_notes; #else /* !CONFIG_KEXEC */ struct pt_regs; diff --git a/kernel/kexec.c b/kernel/kexec.c index 2c95848..1197de8 100644 --- a/kernel/kexec.c +++ b/kernel/kexec.c @@ -26,6 +26,9 @@ #include <asm/system.h> #include <asm/semaphore.h> +/* Per cpu memory for storing cpu states in case of system crash. */ +note_buf_t* crash_notes; + /* Location of the reserved area for the crash kernel */ struct resource crashk_res = { .name = "Crash kernel", @@ -1060,3 +1063,16 @@ void crash_kexec(struct pt_regs *regs) xchg(&kexec_lock, 0); } } + +static int __init crash_notes_memory_init(void) +{ + /* Allocate memory for saving cpu registers. */ + crash_notes = alloc_percpu(note_buf_t); + if (!crash_notes) { + printk("Kexec: Memory allocation for saving cpu register" + " states failed\n"); + return -ENOMEM; + } + return 0; +} +module_init(crash_notes_memory_init) |