From: Magnus Lindholm <linmag7@gmail.com>
To: davem@davemloft.net, andreas@gaisler.com, sparclinux@vger.kernel.org
Cc: linux-kernel@vger.kernel.org, gregkh@linuxfoundation.org,
jirislaby@kernel.org, linux-serial@vger.kernel.org,
linuxppc-dev@lists.ozlabs.org, krzk@kernel.org, oleg@redhat.com,
linmag7@gmail.com, stable@vger.kernel.org
Subject: [PATCH v3 1/8] sparc64: return from the generic clear_page implementation
Date: Mon, 12 Oct 2026 20:48:02 +0200 [thread overview]
Message-ID: <20261012184826.986050-2-linmag7@gmail.com> (raw)
In-Reply-To: <20261012184826.986050-1-linmag7@gmail.com>
GENclear_page falls through into generic_patch_pageops after clearing
its page. The patcher then rewrites kernel text on each invocation.
Return to the caller once the clear loop completes, as GENcopy_page does.
This affects processors using the generic page-operation fallback.
Fixes: 6c70b6fc7b6f ("[SPARC64]: Do not assume sun4v chips have load-twin/store-init support.")
Cc: stable@vger.kernel.org
Signed-off-by: Magnus Lindholm <linmag7@gmail.com>
---
arch/sparc/lib/GENpage.S | 3 +++
1 file changed, 3 insertions(+)
diff --git a/arch/sparc/lib/GENpage.S b/arch/sparc/lib/GENpage.S
index c143c4d1de3f..6ce11108e143 100644
--- a/arch/sparc/lib/GENpage.S
+++ b/arch/sparc/lib/GENpage.S
@@ -48,6 +48,9 @@ GENclear_user_page:
bne,pt %xcc, 1b
add %o0, 64, %o0
+ retl
+ nop
+
#define BRANCH_ALWAYS 0x10680000
#define NOP 0x01000000
#define GEN_DO_PATCH(OLD, NEW) \
next prev parent reply other threads:[~2026-10-12 18:48 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-10-12 18:48 [PATCH v3 0/8] sparc64: add Fujitsu M3000 support Magnus Lindholm
2026-10-12 18:48 ` Magnus Lindholm [this message]
2026-10-12 18:55 ` [PATCH v3 1/8] sparc64: return from the generic clear_page implementation sashiko-bot
2026-10-12 18:48 ` [PATCH v3 2/8] sparc64: honor queued spinlock layout in secondary startup Magnus Lindholm
2026-10-12 18:55 ` sashiko-bot
2026-10-12 18:48 ` [PATCH v3 3/8] sparc64: avoid huge kernel PUD mappings on sun4u Magnus Lindholm
2026-10-12 18:55 ` sashiko-bot
2026-10-12 18:48 ` [PATCH v3 4/8] sparc64: stop IRQ setup when descriptor allocation fails Magnus Lindholm
2026-10-12 19:03 ` sashiko-bot
2026-10-12 18:48 ` [PATCH v3 5/8] sparc64: validate Fire register properties before initialization Magnus Lindholm
2026-10-12 18:55 ` sashiko-bot
2026-10-12 18:48 ` [PATCH v3 6/8] sparc64: add SPARC64 VII CPU, MMU and SMP support Magnus Lindholm
2026-10-12 19:03 ` sashiko-bot
2026-10-12 18:48 ` [PATCH v3 7/8] sparc64: add M3000 Oberon PCIe support Magnus Lindholm
2026-10-12 19:01 ` sashiko-bot
2026-10-12 18:48 ` [PATCH v3 8/8] hvc: add an M3000 firmware console backend Magnus Lindholm
2026-10-12 18:57 ` sashiko-bot
2026-10-13 13:04 ` Greg KH
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