linux-kernel - [PATCH -next v2 0/3] riscv: Fix two vdso issue

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Message-ID: <20210820125042.1844629-1-tongtiangen@huawei.com>
Date:   Fri, 20 Aug 2021 12:50:39 +0000
From:   Tong Tiangen <tongtiangen@...wei.com>
To:     Paul Walmsley <paul.walmsley@...ive.com>,
        Palmer Dabbelt <palmer@...belt.com>,
        Palmer Dabbelt <palmerdabbelt@...gle.com>,
        Albert Ou <aou@...s.berkeley.edu>
CC:     <linux-riscv@...ts.infradead.org>, <linux-kernel@...r.kernel.org>,
        "Tong Tiangen" <tongtiangen@...wei.com>
Subject: [PATCH -next v2 0/3] riscv: Fix two vdso issue

v2->v1:
 Add patch "Refactor asm/vdso.h" to avoid vdso.lds syntax error if
 CONFIG_GENERIC_TIME_VSYSCALL=n.

1) Refactor the asm/vdso.h to avoid vdso.lds syntax error.

2) Move vdso data page up front and introduce enum vvar_pages, To pave the
way for the subsequent support of TIME_NS, the support of TIME_NS will be
issued in the later patch.

3) In arch_setup_additional_pages(), make Wait for the lock in the
killable mode and return with EINTR if the task got killed while waiting.

Tong Tiangen (3):
  riscv/vdso: Refactor asm/vdso.h
  riscv/vdso: Move vdso data page up front
  riscv/vdso: make arch_setup_additional_pages wait for mmap_sem for
    write killable

 arch/riscv/include/asm/syscall.h  |  1 +
 arch/riscv/include/asm/vdso.h     | 10 ++----
 arch/riscv/kernel/syscall_table.c |  1 -
 arch/riscv/kernel/vdso.c          | 53 +++++++++++++++++++------------
 arch/riscv/kernel/vdso/vdso.lds.S |  3 +-
 5 files changed, 39 insertions(+), 29 deletions(-)

-- 
2.18.0.huawei.25