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authorTiejun Chen <tiejun.chen@windriver.com>2013-06-20 18:28:29 +0800
committerScott Wood <scottwood@freescale.com>2013-10-18 18:38:10 -0500
commit8258e268c15a29c09d7c88d91a948bdf729433d8 (patch)
tree6b2631e5ae07efcc976709cdfbd94f1462efeb6f
parent9863c28a2af90a56c088f5f6288d7f6d2c923c14 (diff)
powerpc/kgdb: use DEFINE_PER_CPU to allocate kgdb's thread_info
Use DEFINE_PER_CPU to allocate thread_info statically instead of kmalloc(). This can avoid introducing more memory check codes. Signed-off-by: Tiejun Chen <tiejun.chen@windriver.com> [scottwood@freescale.com: wrapped long line] Signed-off-by: Scott Wood <scottwood@freescale.com>
-rw-r--r--arch/powerpc/kernel/kgdb.c6
1 files changed, 3 insertions, 3 deletions
diff --git a/arch/powerpc/kernel/kgdb.c b/arch/powerpc/kernel/kgdb.c
index c1eef241017a..83e89d310734 100644
--- a/arch/powerpc/kernel/kgdb.c
+++ b/arch/powerpc/kernel/kgdb.c
@@ -151,15 +151,16 @@ static int kgdb_handle_breakpoint(struct pt_regs *regs)
return 1;
}
+static DEFINE_PER_CPU(struct thread_info, kgdb_thread_info);
static int kgdb_singlestep(struct pt_regs *regs)
{
struct thread_info *thread_info, *exception_thread_info;
- struct thread_info *backup_current_thread_info;
+ struct thread_info *backup_current_thread_info =
+ &__get_cpu_var(kgdb_thread_info);
if (user_mode(regs))
return 0;
- backup_current_thread_info = kmalloc(sizeof(struct thread_info), GFP_KERNEL);
/*
* On Book E and perhaps other processors, singlestep is handled on
* the critical exception stack. This causes current_thread_info()
@@ -185,7 +186,6 @@ static int kgdb_singlestep(struct pt_regs *regs)
/* Restore current_thread_info lastly. */
memcpy(exception_thread_info, backup_current_thread_info, sizeof *thread_info);
- kfree(backup_current_thread_info);
return 1;
}