From: Magnus Lindholm <linmag7@gmail.com>
To: sparclinux@vger.kernel.org,
"David S . Miller" <davem@davemloft.net>,
Andreas Larsson <andreas@gaisler.com>
Cc: linux-kernel@vger.kernel.org, Magnus Lindholm <linmag7@gmail.com>,
stable@vger.kernel.org
Subject: [PATCH 1/7] sparc64: return from the generic clear_page implementation
Date: Fri, 2 Oct 2026 18:14:23 +0200 [thread overview]
Message-ID: <20261002161515.932316-2-linmag7@gmail.com> (raw)
In-Reply-To: <20261002161515.932316-1-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) \
--
2.43.0
next prev parent reply other threads:[~2026-10-02 16:15 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-10-02 16:14 [PATCH 0/7] sparc64: add Fujitsu M3000 support Magnus Lindholm
2026-10-02 16:14 ` Magnus Lindholm [this message]
2026-10-02 16:14 ` [PATCH 2/7] sparc64: honor queued spinlock layout in secondary startup Magnus Lindholm
2026-10-02 16:14 ` [PATCH 3/7] sparc64: avoid huge kernel PUD mappings on sun4u Magnus Lindholm
2026-10-02 16:14 ` [PATCH 4/7] sparc64: add SPARC64 VII CPU, MMU and SMP support Magnus Lindholm
2026-10-02 16:14 ` [PATCH 5/7] sparc64: add M3000 Oberon PCIe support Magnus Lindholm
2026-10-02 16:14 ` [PATCH 6/7] tg3: normalize inherited M3000 register byte order Magnus Lindholm
2026-10-02 16:14 ` [PATCH 7/7] hvc: add an M3000 firmware console backend Magnus Lindholm
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