From: Julien Beraud <julien.beraud@spectracom.orolia.com>
To: <linux-kernel@vger.kernel.org>, <nios2-dev@lists.rocketboards.org>
Cc: <lftan@altera.com>, Julien Beraud <julien.beraud@spectracom.orolia.com>
Subject: [PATCH 1/1] nios2: implement flush_dcache_mmap_lock/unlock
Date: Mon, 3 Apr 2017 13:11:10 +0200 [thread overview]
Message-ID: <20170403111110.5442-1-julien.beraud@spectracom.orolia.com> (raw)
Use spin_lock/unlock_irq instead of doing nothing. This fixes corruptions
of the vma_interval_tree causing the kernel to be stuck in an
infinite loop in vma_interval_tree_foreach.
Signed-off-by: Julien Beraud <julien.beraud@spectracom.orolia.com>
---
arch/nios2/include/asm/cacheflush.h | 6 ++++--
1 file changed, 4 insertions(+), 2 deletions(-)
diff --git a/arch/nios2/include/asm/cacheflush.h b/arch/nios2/include/asm/cacheflush.h
index 52abba973dc2..55e383c173f7 100644
--- a/arch/nios2/include/asm/cacheflush.h
+++ b/arch/nios2/include/asm/cacheflush.h
@@ -46,7 +46,9 @@ extern void copy_from_user_page(struct vm_area_struct *vma, struct page *page,
extern void flush_dcache_range(unsigned long start, unsigned long end);
extern void invalidate_dcache_range(unsigned long start, unsigned long end);
-#define flush_dcache_mmap_lock(mapping) do { } while (0)
-#define flush_dcache_mmap_unlock(mapping) do { } while (0)
+#define flush_dcache_mmap_lock(mapping) \
+ spin_lock_irq(&(mapping)->tree_lock)
+#define flush_dcache_mmap_unlock(mapping) \
+ spin_unlock_irq(&(mapping)->tree_lock)
#endif /* _ASM_NIOS2_CACHEFLUSH_H */
--
2.11.0
next reply other threads:[~2017-04-03 11:11 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-04-03 11:11 Julien Beraud [this message]
2017-04-11 15:50 ` [PATCH 1/1] nios2: implement flush_dcache_mmap_lock/unlock Ley Foon Tan
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20170403111110.5442-1-julien.beraud@spectracom.orolia.com \
--to=julien.beraud@spectracom.orolia.com \
--cc=lftan@altera.com \
--cc=linux-kernel@vger.kernel.org \
--cc=nios2-dev@lists.rocketboards.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.