[PATCH] Kprobes: prevent possible race conditions sparc64 changes
This patch contains the sparc64 architecture specific changes to prevent the
possible race conditions.
Signed-off-by: Prasanna S Panchamukhi <prasanna@in.ibm.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
diff --git a/arch/sparc64/mm/fault.c b/arch/sparc64/mm/fault.c
index 52e9375..db1e331 100644
--- a/arch/sparc64/mm/fault.c
+++ b/arch/sparc64/mm/fault.c
@@ -18,6 +18,7 @@
#include <linux/smp_lock.h>
#include <linux/init.h>
#include <linux/interrupt.h>
+#include <linux/kprobes.h>
#include <asm/page.h>
#include <asm/pgtable.h>
@@ -117,8 +118,9 @@
return tally;
}
-static void unhandled_fault(unsigned long address, struct task_struct *tsk,
- struct pt_regs *regs)
+static void __kprobes unhandled_fault(unsigned long address,
+ struct task_struct *tsk,
+ struct pt_regs *regs)
{
if ((unsigned long) address < PAGE_SIZE) {
printk(KERN_ALERT "Unable to handle kernel NULL "
@@ -304,7 +306,7 @@
unhandled_fault (address, current, regs);
}
-asmlinkage void do_sparc64_fault(struct pt_regs *regs)
+asmlinkage void __kprobes do_sparc64_fault(struct pt_regs *regs)
{
struct mm_struct *mm = current->mm;
struct vm_area_struct *vma;
diff --git a/arch/sparc64/mm/init.c b/arch/sparc64/mm/init.c
index 3fbaf34..fdb1ebb 100644
--- a/arch/sparc64/mm/init.c
+++ b/arch/sparc64/mm/init.c
@@ -19,6 +19,7 @@
#include <linux/pagemap.h>
#include <linux/fs.h>
#include <linux/seq_file.h>
+#include <linux/kprobes.h>
#include <asm/head.h>
#include <asm/system.h>
@@ -250,7 +251,7 @@
put_cpu();
}
-void flush_icache_range(unsigned long start, unsigned long end)
+void __kprobes flush_icache_range(unsigned long start, unsigned long end)
{
/* Cheetah has coherent I-cache. */
if (tlb_type == spitfire) {
diff --git a/arch/sparc64/mm/ultra.S b/arch/sparc64/mm/ultra.S
index 8dfa825..78beff3 100644
--- a/arch/sparc64/mm/ultra.S
+++ b/arch/sparc64/mm/ultra.S
@@ -119,6 +119,7 @@
#else
#error unsupported PAGE_SIZE
#endif
+ .section .kprobes.text
.align 32
.globl __flush_icache_page
__flush_icache_page: /* %o0 = phys_page */
@@ -201,6 +202,7 @@
nop
#endif /* DCACHE_ALIASING_POSSIBLE */
+ .previous .text
.align 32
__prefill_dtlb:
rdpr %pstate, %g7