linux-kernel - [PATCH v6 09/14] RISC-V: Use mmgrab()

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:   Tue,  2 Oct 2018 12:15:02 -0700
From:   Atish Patra <atish.patra@....com>
To:     linux-riscv@...ts.infradead.org, palmer@...ive.com
Cc:     anup@...infault.org, hch@...radead.org,
        linux-kernel@...r.kernel.org, atish.patra@....com
Subject: [PATCH v6 09/14] RISC-V: Use mmgrab()

From: Palmer Dabbelt <palmer@...ive.com>

commit f1f1007644ff ("mm: add new mmgrab() helper") added a
helper that we missed out on.

Signed-off-by: Palmer Dabbelt <palmer@...ive.com>
Reviewed-by: Christoph Hellwig <hch@....de>
Signed-off-by: Atish Patra <atish.patra@....com>
---
 arch/riscv/kernel/smpboot.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/arch/riscv/kernel/smpboot.c b/arch/riscv/kernel/smpboot.c
index 4a232600..17e74831 100644
--- a/arch/riscv/kernel/smpboot.c
+++ b/arch/riscv/kernel/smpboot.c
@@ -30,6 +30,7 @@
 #include <linux/irq.h>
 #include <linux/of.h>
 #include <linux/sched/task_stack.h>
+#include <linux/sched/mm.h>
 #include <asm/irq.h>
 #include <asm/mmu_context.h>
 #include <asm/tlbflush.h>
@@ -101,7 +102,7 @@ asmlinkage void __init smp_callin(void)
 	struct mm_struct *mm = &init_mm;
 
 	/* All kernel threads share the same mm context.  */
-	atomic_inc(&mm->mm_count);
+	mmgrab(mm);
 	current->active_mm = mm;
 
 	trap_init();
-- 
2.7.4