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Mon, 12 Oct 2026 11:48:44 -0700 (PDT) From: Magnus Lindholm 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 Message-ID: <20261012184826.986050-2-linmag7@gmail.com> X-Mailer: git-send-email 2.53.0 In-Reply-To: <20261012184826.986050-1-linmag7@gmail.com> References: <20261012184826.986050-1-linmag7@gmail.com> Precedence: bulk X-Mailing-List: sparclinux@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 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 --- 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) \