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[192.243.127.228]) by smtp.gmail.com with ESMTPSA id d2e1a72fcca58-71434235f77sm184096b3a.13.2024.08.21.16.06.30 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 21 Aug 2024 16:06:30 -0700 (PDT) From: Woody Zhang To: Thomas Gleixner , Andrew Morton Cc: linux-kernel@vger.kernel.org, Woody Zhang Subject: [PATCH 4/5] list_bl: add hlist_bl_move_list and two macros Date: Thu, 22 Aug 2024 07:05:38 +0800 Message-ID: <20240821230539.168107-5-woodyzhang666@gmail.com> X-Mailer: git-send-email 2.45.2 In-Reply-To: <20240821230539.168107-1-woodyzhang666@gmail.com> References: <20240821230539.168107-1-woodyzhang666@gmail.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" hlist_bl_move_list is similar to hlist_move_list. Caller should decide whether bit locking is required for old and new hash list. Signed-off-by: Woody Zhang --- include/linux/list_bl.h | 13 +++++++++++++ 1 file changed, 13 insertions(+) diff --git a/include/linux/list_bl.h b/include/linux/list_bl.h index d25c659f6635..928048354e04 100644 --- a/include/linux/list_bl.h +++ b/include/linux/list_bl.h @@ -38,6 +38,8 @@ struct hlist_bl_head { struct hlist_bl_node { struct hlist_bl_node *next, **pprev; }; +#define HLIST_BL_HEAD_INIT { .first =3D NULL } +#define HLIST_BL_HEAD(name) struct hlist_bl_head name =3D { .first =3D NU= LL } #define INIT_HLIST_BL_HEAD(ptr) \ ((ptr)->first =3D NULL) =20 @@ -142,6 +144,17 @@ static inline void hlist_bl_del_init(struct hlist_bl_n= ode *n) } } =20 +static inline void hlist_bl_move_list(struct hlist_bl_head *old, + struct hlist_bl_head *new) +{ + struct hlist_bl_node *n =3D hlist_bl_first(old); + + hlist_bl_set_first(new, n); + if (n) + n->pprev =3D &new->first; + hlist_bl_set_first(old, NULL); +} + static inline void hlist_bl_lock(struct hlist_bl_head *b) { bit_spin_lock(0, (unsigned long *)b); --=20 2.45.2