From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-pg0-f70.google.com (mail-pg0-f70.google.com [74.125.83.70]) by kanga.kvack.org (Postfix) with ESMTP id CFA4E6B02B4 for ; Sun, 4 Feb 2018 20:34:00 -0500 (EST) Received: by mail-pg0-f70.google.com with SMTP id h5so18609061pgv.21 for ; Sun, 04 Feb 2018 17:34:00 -0800 (PST) Received: from mx2.suse.de (mx2.suse.de. [195.135.220.15]) by mx.google.com with ESMTPS id 68-v6si3704801ple.371.2018.02.04.17.28.05 for (version=TLS1 cipher=AES128-SHA bits=128/128); Sun, 04 Feb 2018 17:28:05 -0800 (PST) From: Davidlohr Bueso Subject: [PATCH 38/64] arch/blackfin: use mm locking wrappers Date: Mon, 5 Feb 2018 02:27:28 +0100 Message-Id: <20180205012754.23615-39-dbueso@wotan.suse.de> In-Reply-To: <20180205012754.23615-1-dbueso@wotan.suse.de> References: <20180205012754.23615-1-dbueso@wotan.suse.de> Sender: owner-linux-mm@kvack.org List-ID: To: akpm@linux-foundation.org, mingo@kernel.org Cc: peterz@infradead.org, ldufour@linux.vnet.ibm.com, jack@suse.cz, mhocko@kernel.org, kirill.shutemov@linux.intel.com, mawilcox@microsoft.com, mgorman@techsingularity.net, dave@stgolabs.net, linux-mm@kvack.org, linux-kernel@vger.kernel.org, Davidlohr Bueso From: Davidlohr Bueso This becomes quite straightforward with the mmrange in place. Signed-off-by: Davidlohr Bueso --- arch/blackfin/kernel/ptrace.c | 5 +++-- arch/blackfin/kernel/trace.c | 7 ++++--- 2 files changed, 7 insertions(+), 5 deletions(-) diff --git a/arch/blackfin/kernel/ptrace.c b/arch/blackfin/kernel/ptrace.c index a6827095b99a..e6657ab61afc 100644 --- a/arch/blackfin/kernel/ptrace.c +++ b/arch/blackfin/kernel/ptrace.c @@ -121,15 +121,16 @@ is_user_addr_valid(struct task_struct *child, unsigned long start, unsigned long bool valid; struct vm_area_struct *vma; struct sram_list_struct *sraml; + DEFINE_RANGE_LOCK_FULL(mmrange); /* overflow */ if (start + len < start) return -EIO; - down_read(&child->mm->mmap_sem); + mm_read_lock(child->mm, &mmrange); vma = find_vma(child->mm, start); valid = vma && start >= vma->vm_start && start + len <= vma->vm_end; - up_read(&child->mm->mmap_sem); + mm_read_unlock(child->mm, &mmrange); if (valid) return 0; diff --git a/arch/blackfin/kernel/trace.c b/arch/blackfin/kernel/trace.c index 151f22196ab6..9bf938b14601 100644 --- a/arch/blackfin/kernel/trace.c +++ b/arch/blackfin/kernel/trace.c @@ -33,6 +33,7 @@ void decode_address(char *buf, unsigned long address) struct mm_struct *mm; unsigned long offset; struct rb_node *n; + DEFINE_RANGE_LOCK_FULL(mmrange); #ifdef CONFIG_KALLSYMS unsigned long symsize; @@ -124,7 +125,7 @@ void decode_address(char *buf, unsigned long address) continue; mm = t->mm; - if (!down_read_trylock(&mm->mmap_sem)) + if (!mm_read_trylock(mm, &mmrange)) goto __continue; for (n = rb_first(&mm->mm_rb); n; n = rb_next(n)) { @@ -166,7 +167,7 @@ void decode_address(char *buf, unsigned long address) sprintf(buf, "[ %s vma:0x%lx-0x%lx]", name, vma->vm_start, vma->vm_end); - up_read(&mm->mmap_sem); + mm_read_unlock(mm, &mmrange); task_unlock(t); if (buf[0] == '\0') @@ -176,7 +177,7 @@ void decode_address(char *buf, unsigned long address) } } - up_read(&mm->mmap_sem); + mm_read_unlock(mm, &mmrange); __continue: task_unlock(t); } -- 2.13.6 -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: email@kvack.org