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Merge branch 'parisc-4.9-2' of git://git.kernel.org/pub/scm/linux/kernel/git/deller/parisc-linux

Browse Source 
Pull parisc fixes from Helge Deller:
 "Some final updates and fixes for this merge window for the parisc
  architecture. Changes include:

   - Fix boot problems with new memblock allocator on rp3410 machine

   - Increase initial kernel mapping size for 32- and 64-bit kernels,
     this allows to boot bigger kernels which have many modules built-in

   - Fix kernel layout regarding __gp and move exception table into RO
     section

   - Show trap names in crashes, use extable.h header instead of
     module.h"

* 'parisc-4.9-2' of git://git.kernel.org/pub/scm/linux/kernel/git/deller/parisc-linux:
  parisc: Show trap name in kernel crash
  parisc: Zero-initialize newly alloced memblock
  parisc: Move exception table into read-only section
  parisc: Fix kernel memory layout regarding position of __gp
  parisc: Increase initial kernel mapping size
  parisc: Migrate exception table users off module.h and onto extable.h
This commit is contained in:
Linus Torvalds 2016-10-11 23:59:07 -07:00
commit 1573d2caf7
6 changed files with 29 additions and 17 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

6
arch/parisc/include/asm/pgtable.h
View File

@ -83,10 +83,10 @@ static inline void purge_tlb_entries(struct mm_struct *mm, unsigned long addr)
printk("%s:%d: bad pgd %08lx.\n", __FILE__, __LINE__, (unsigned long)pgd_val(e))
/* This is the size of the initially mapped kernel memory */
#if defined(CONFIG_64BIT) || defined(CONFIG_SMP)
#define KERNEL_INITIAL_ORDER 25 /* 1<<25 = 32MB */
#if defined(CONFIG_64BIT)
#define KERNEL_INITIAL_ORDER 26 /* 1<<26 = 64MB */
#else
#define KERNEL_INITIAL_ORDER 24 /* 1<<24 = 16MB */
#define KERNEL_INITIAL_ORDER 25 /* 1<<25 = 32MB */
#endif
#define KERNEL_INITIAL_SIZE (1 << KERNEL_INITIAL_ORDER)

1
arch/parisc/include/asm/traps.h
View File

@ -11,6 +11,7 @@ void parisc_terminate(char *msg, struct pt_regs *regs,
void die_if_kernel(char *str, struct pt_regs *regs, long err);
/* mm/fault.c */
const char *trap_name(unsigned long code);
void do_page_fault(struct pt_regs *regs, unsigned long code,
unsigned long address);
#endif

4
arch/parisc/kernel/traps.c
View File

@ -458,8 +458,8 @@ void parisc_terminate(char *msg, struct pt_regs *regs, int code, unsigned long o
}
printk("\n");
printk(KERN_CRIT "%s: Code=%d regs=%p (Addr=" RFMT ")\n",
msg, code, regs, offset);
pr_crit("%s: Code=%d (%s) regs=%p (Addr=" RFMT ")\n",
msg, code, trap_name(code), regs, offset);
show_regs(regs);
spin_unlock(&terminate_lock);

14
arch/parisc/kernel/vmlinux.lds.S
View File

@ -90,8 +90,9 @@ SECTIONS
/* Start of data section */
_sdata = .;
RO_DATA_SECTION(8)
/* Architecturally we need to keep __gp below 0x1000000 and thus
* in front of RO_DATA_SECTION() which stores lots of tracepoint
* and ftrace symbols. */
#ifdef CONFIG_64BIT
. = ALIGN(16);
/* Linkage tables */
@ -106,6 +107,12 @@ SECTIONS
}
#endif
RO_DATA_SECTION(8)
/* RO because of BUILDTIME_EXTABLE_SORT */
EXCEPTION_TABLE(8)
NOTES
/* unwind info */
.PARISC.unwind : {
__start___unwind = .;
@ -121,9 +128,6 @@ SECTIONS
. = ALIGN(HUGEPAGE_SIZE);
data_start = .;
EXCEPTION_TABLE(8)
NOTES
/* Data */
RW_DATA_SECTION(L1_CACHE_BYTES, PAGE_SIZE, PAGE_SIZE)

19
arch/parisc/mm/fault.c
View File

@ -14,7 +14,7 @@
#include <linux/ptrace.h>
#include <linux/sched.h>
#include <linux/interrupt.h>
#include <linux/module.h>
#include <linux/extable.h>
#include <linux/uaccess.h>
#include <asm/traps.h>
@ -204,6 +204,16 @@ static const char * const trap_description[] = {
[28] "Unaligned data reference trap",
};
const char *trap_name(unsigned long code)
{
const char *t = NULL;
if (code < ARRAY_SIZE(trap_description))
t = trap_description[code];
return t ? t : "Unknown trap";
}
/*
* Print out info about fatal segfaults, if the show_unhandled_signals
* sysctl is set:
@ -213,8 +223,6 @@ show_signal_msg(struct pt_regs *regs, unsigned long code,
unsigned long address, struct task_struct *tsk,
struct vm_area_struct *vma)
{
const char *trap_name = NULL;
if (!unhandled_signal(tsk, SIGSEGV))
return;
@ -226,10 +234,7 @@ show_signal_msg(struct pt_regs *regs, unsigned long code,
tsk->comm, code, address);
print_vma_addr(KERN_CONT " in ", regs->iaoq[0]);
if (code < ARRAY_SIZE(trap_description))
trap_name = trap_description[code];
pr_warn(KERN_CONT " trap #%lu: %s%c", code,
trap_name ? trap_name : "unknown",
pr_cont(" trap #%lu: %s%c", code, trap_name(code),
vma ? ',':'\n');
if (vma)

2
arch/parisc/mm/init.c
View File

@ -105,6 +105,8 @@ static void * __init get_memblock(unsigned long size)
else
panic("get_memblock() failed.\n");
memset(__va(phys), 0, size);
return __va(phys);
}