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| author | Tiejun Chen <tiejun.chen@windriver.com> | 2013-06-20 12:28:29 +0200 |
|---|---|---|
| committer | Scott Wood <scottwood@freescale.com> | 2013-10-19 01:38:10 +0200 |
| commit | 8258e268c15a29c09d7c88d91a948bdf729433d8 (patch) | |
| tree | 6b2631e5ae07efcc976709cdfbd94f1462efeb6f /arch/powerpc/kernel/kgdb.c | |
| parent | powerpc: Emulate sync instruction variants (diff) | |
| download | linux-8258e268c15a29c09d7c88d91a948bdf729433d8.tar.xz linux-8258e268c15a29c09d7c88d91a948bdf729433d8.zip | |
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>
Diffstat (limited to 'arch/powerpc/kernel/kgdb.c')
| -rw-r--r-- | arch/powerpc/kernel/kgdb.c | 6 |
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; } |