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[209.132.180.67]) by mx.google.com with ESMTP id y17si2755898pff.238.2018.03.15.12.18.28; Thu, 15 Mar 2018 12:18:42 -0700 (PDT) Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67; Authentication-Results: mx.google.com; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752900AbeCOTPE (ORCPT + 99 others); Thu, 15 Mar 2018 15:15:04 -0400 Received: from isilmar-4.linta.de ([136.243.71.142]:35822 "EHLO isilmar-4.linta.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932507AbeCOTGT (ORCPT ); Thu, 15 Mar 2018 15:06:19 -0400 Received: from light.dominikbrodowski.net (isilmar.linta [10.0.0.1]) by isilmar-4.linta.de (Postfix) with ESMTPS id E14832008FF; Thu, 15 Mar 2018 19:06:17 +0000 (UTC) Received: by light.dominikbrodowski.net (Postfix, from userid 1000) id 69ED220691; Thu, 15 Mar 2018 20:05:39 +0100 (CET) From: Dominik Brodowski To: linux-kernel@vger.kernel.org, torvalds@linux-foundation.org, viro@zeniv.linux.org.uk Cc: luto@kernel.org, mingo@kernel.org, akpm@linux-foundation.org, arnd@arndb.de, linux-mm@kvack.org Subject: [PATCH v2 21/36] mm: add ksys_mmap_pgoff() helper; remove in-kernel calls to sys_mmap_pgoff() Date: Thu, 15 Mar 2018 20:05:14 +0100 Message-Id: <20180315190529.20943-22-linux@dominikbrodowski.net> X-Mailer: git-send-email 2.16.2 In-Reply-To: <20180315190529.20943-1-linux@dominikbrodowski.net> References: <20180315190529.20943-1-linux@dominikbrodowski.net> Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Using this helper allows us to avoid the in-kernel calls to the sys_mmap_pgoff() syscall. Cc: Andrew Morton Cc: linux-mm@kvack.org Signed-off-by: Dominik Brodowski --- arch/alpha/kernel/osf_sys.c | 2 +- arch/arm64/kernel/sys.c | 2 +- arch/ia64/kernel/sys_ia64.c | 4 ++-- arch/m68k/kernel/sys_m68k.c | 2 +- arch/microblaze/kernel/sys_microblaze.c | 6 +++--- arch/mips/kernel/linux32.c | 4 ++-- arch/mips/kernel/syscall.c | 6 ++++-- arch/parisc/kernel/sys_parisc.c | 6 +++--- arch/powerpc/kernel/syscalls.c | 2 +- arch/riscv/kernel/sys_riscv.c | 4 ++-- arch/s390/kernel/compat_linux.c | 6 +++--- arch/s390/kernel/sys_s390.c | 2 +- arch/sh/kernel/sys_sh.c | 4 ++-- arch/sparc/kernel/sys_sparc_32.c | 6 +++--- arch/sparc/kernel/sys_sparc_64.c | 2 +- arch/um/kernel/syscall.c | 2 +- arch/x86/ia32/sys_ia32.c | 2 +- arch/x86/kernel/sys_x86_64.c | 2 +- include/linux/syscalls.h | 3 +++ mm/mmap.c | 17 ++++++++++++----- mm/nommu.c | 17 ++++++++++++----- 21 files changed, 60 insertions(+), 41 deletions(-) diff --git a/arch/alpha/kernel/osf_sys.c b/arch/alpha/kernel/osf_sys.c index fa1a392ca9a2..89faa6f4de47 100644 --- a/arch/alpha/kernel/osf_sys.c +++ b/arch/alpha/kernel/osf_sys.c @@ -189,7 +189,7 @@ SYSCALL_DEFINE6(osf_mmap, unsigned long, addr, unsigned long, len, goto out; if (off & ~PAGE_MASK) goto out; - ret = sys_mmap_pgoff(addr, len, prot, flags, fd, off >> PAGE_SHIFT); + ret = ksys_mmap_pgoff(addr, len, prot, flags, fd, off >> PAGE_SHIFT); out: return ret; } diff --git a/arch/arm64/kernel/sys.c b/arch/arm64/kernel/sys.c index 26fe8ea93ea2..72981bae10eb 100644 --- a/arch/arm64/kernel/sys.c +++ b/arch/arm64/kernel/sys.c @@ -34,7 +34,7 @@ asmlinkage long sys_mmap(unsigned long addr, unsigned long len, if (offset_in_page(off) != 0) return -EINVAL; - return sys_mmap_pgoff(addr, len, prot, flags, fd, off >> PAGE_SHIFT); + return ksys_mmap_pgoff(addr, len, prot, flags, fd, off >> PAGE_SHIFT); } SYSCALL_DEFINE1(arm64_personality, unsigned int, personality) diff --git a/arch/ia64/kernel/sys_ia64.c b/arch/ia64/kernel/sys_ia64.c index 085adfcc74a4..9ebe1d633abc 100644 --- a/arch/ia64/kernel/sys_ia64.c +++ b/arch/ia64/kernel/sys_ia64.c @@ -139,7 +139,7 @@ int ia64_mmap_check(unsigned long addr, unsigned long len, asmlinkage unsigned long sys_mmap2 (unsigned long addr, unsigned long len, int prot, int flags, int fd, long pgoff) { - addr = sys_mmap_pgoff(addr, len, prot, flags, fd, pgoff); + addr = ksys_mmap_pgoff(addr, len, prot, flags, fd, pgoff); if (!IS_ERR((void *) addr)) force_successful_syscall_return(); return addr; @@ -151,7 +151,7 @@ sys_mmap (unsigned long addr, unsigned long len, int prot, int flags, int fd, lo if (offset_in_page(off) != 0) return -EINVAL; - addr = sys_mmap_pgoff(addr, len, prot, flags, fd, off >> PAGE_SHIFT); + addr = ksys_mmap_pgoff(addr, len, prot, flags, fd, off >> PAGE_SHIFT); if (!IS_ERR((void *) addr)) force_successful_syscall_return(); return addr; diff --git a/arch/m68k/kernel/sys_m68k.c b/arch/m68k/kernel/sys_m68k.c index 27e10af5153a..6363ec83a290 100644 --- a/arch/m68k/kernel/sys_m68k.c +++ b/arch/m68k/kernel/sys_m68k.c @@ -46,7 +46,7 @@ asmlinkage long sys_mmap2(unsigned long addr, unsigned long len, * so we need to shift the argument down by 1; m68k mmap64(3) * (in libc) expects the last argument of mmap2 in 4Kb units. */ - return sys_mmap_pgoff(addr, len, prot, flags, fd, pgoff); + return ksys_mmap_pgoff(addr, len, prot, flags, fd, pgoff); } /* Convert virtual (user) address VADDR to physical address PADDR */ diff --git a/arch/microblaze/kernel/sys_microblaze.c b/arch/microblaze/kernel/sys_microblaze.c index f1e1f666ddde..ed9f34da1a2a 100644 --- a/arch/microblaze/kernel/sys_microblaze.c +++ b/arch/microblaze/kernel/sys_microblaze.c @@ -40,7 +40,7 @@ SYSCALL_DEFINE6(mmap, unsigned long, addr, unsigned long, len, if (pgoff & ~PAGE_MASK) return -EINVAL; - return sys_mmap_pgoff(addr, len, prot, flags, fd, pgoff >> PAGE_SHIFT); + return ksys_mmap_pgoff(addr, len, prot, flags, fd, pgoff >> PAGE_SHIFT); } SYSCALL_DEFINE6(mmap2, unsigned long, addr, unsigned long, len, @@ -50,6 +50,6 @@ SYSCALL_DEFINE6(mmap2, unsigned long, addr, unsigned long, len, if (pgoff & (~PAGE_MASK >> 12)) return -EINVAL; - return sys_mmap_pgoff(addr, len, prot, flags, fd, - pgoff >> (PAGE_SHIFT - 12)); + return ksys_mmap_pgoff(addr, len, prot, flags, fd, + pgoff >> (PAGE_SHIFT - 12)); } diff --git a/arch/mips/kernel/linux32.c b/arch/mips/kernel/linux32.c index b8a3cf5d5950..0ce4f7240f69 100644 --- a/arch/mips/kernel/linux32.c +++ b/arch/mips/kernel/linux32.c @@ -67,8 +67,8 @@ SYSCALL_DEFINE6(32_mmap2, unsigned long, addr, unsigned long, len, { if (pgoff & (~PAGE_MASK >> 12)) return -EINVAL; - return sys_mmap_pgoff(addr, len, prot, flags, fd, - pgoff >> (PAGE_SHIFT-12)); + return ksys_mmap_pgoff(addr, len, prot, flags, fd, + pgoff >> (PAGE_SHIFT-12)); } #define RLIM_INFINITY32 0x7fffffff diff --git a/arch/mips/kernel/syscall.c b/arch/mips/kernel/syscall.c index 58c6f634b550..69c17b549fd3 100644 --- a/arch/mips/kernel/syscall.c +++ b/arch/mips/kernel/syscall.c @@ -63,7 +63,8 @@ SYSCALL_DEFINE6(mips_mmap, unsigned long, addr, unsigned long, len, { if (offset & ~PAGE_MASK) return -EINVAL; - return sys_mmap_pgoff(addr, len, prot, flags, fd, offset >> PAGE_SHIFT); + return ksys_mmap_pgoff(addr, len, prot, flags, fd, + offset >> PAGE_SHIFT); } SYSCALL_DEFINE6(mips_mmap2, unsigned long, addr, unsigned long, len, @@ -73,7 +74,8 @@ SYSCALL_DEFINE6(mips_mmap2, unsigned long, addr, unsigned long, len, if (pgoff & (~PAGE_MASK >> 12)) return -EINVAL; - return sys_mmap_pgoff(addr, len, prot, flags, fd, pgoff >> (PAGE_SHIFT-12)); + return ksys_mmap_pgoff(addr, len, prot, flags, fd, + pgoff >> (PAGE_SHIFT - 12)); } save_static_function(sys_fork); diff --git a/arch/parisc/kernel/sys_parisc.c b/arch/parisc/kernel/sys_parisc.c index da1c27ea8e1a..572feeea834c 100644 --- a/arch/parisc/kernel/sys_parisc.c +++ b/arch/parisc/kernel/sys_parisc.c @@ -270,8 +270,8 @@ asmlinkage unsigned long sys_mmap2(unsigned long addr, unsigned long len, { /* Make sure the shift for mmap2 is constant (12), no matter what PAGE_SIZE we have. */ - return sys_mmap_pgoff(addr, len, prot, flags, fd, - pgoff >> (PAGE_SHIFT - 12)); + return ksys_mmap_pgoff(addr, len, prot, flags, fd, + pgoff >> (PAGE_SHIFT - 12)); } asmlinkage unsigned long sys_mmap(unsigned long addr, unsigned long len, @@ -279,7 +279,7 @@ asmlinkage unsigned long sys_mmap(unsigned long addr, unsigned long len, unsigned long offset) { if (!(offset & ~PAGE_MASK)) { - return sys_mmap_pgoff(addr, len, prot, flags, fd, + return ksys_mmap_pgoff(addr, len, prot, flags, fd, offset >> PAGE_SHIFT); } else { return -EINVAL; diff --git a/arch/powerpc/kernel/syscalls.c b/arch/powerpc/kernel/syscalls.c index ecb981eea74b..1ef3b80b62a6 100644 --- a/arch/powerpc/kernel/syscalls.c +++ b/arch/powerpc/kernel/syscalls.c @@ -57,7 +57,7 @@ static inline long do_mmap2(unsigned long addr, size_t len, off >>= shift; } - ret = sys_mmap_pgoff(addr, len, prot, flags, fd, off); + ret = ksys_mmap_pgoff(addr, len, prot, flags, fd, off); out: return ret; } diff --git a/arch/riscv/kernel/sys_riscv.c b/arch/riscv/kernel/sys_riscv.c index 79c78668258e..f7181ed8aafc 100644 --- a/arch/riscv/kernel/sys_riscv.c +++ b/arch/riscv/kernel/sys_riscv.c @@ -24,8 +24,8 @@ static long riscv_sys_mmap(unsigned long addr, unsigned long len, { if (unlikely(offset & (~PAGE_MASK >> page_shift_offset))) return -EINVAL; - return sys_mmap_pgoff(addr, len, prot, flags, fd, - offset >> (PAGE_SHIFT - page_shift_offset)); + return ksys_mmap_pgoff(addr, len, prot, flags, fd, + offset >> (PAGE_SHIFT - page_shift_offset)); } #ifdef CONFIG_64BIT diff --git a/arch/s390/kernel/compat_linux.c b/arch/s390/kernel/compat_linux.c index 357a66934a98..a47995a5174c 100644 --- a/arch/s390/kernel/compat_linux.c +++ b/arch/s390/kernel/compat_linux.c @@ -442,8 +442,8 @@ COMPAT_SYSCALL_DEFINE1(s390_old_mmap, struct mmap_arg_struct_emu31 __user *, arg return -EFAULT; if (a.offset & ~PAGE_MASK) return -EINVAL; - return sys_mmap_pgoff(a.addr, a.len, a.prot, a.flags, a.fd, - a.offset >> PAGE_SHIFT); + return ksys_mmap_pgoff(a.addr, a.len, a.prot, a.flags, a.fd, + a.offset >> PAGE_SHIFT); } COMPAT_SYSCALL_DEFINE1(s390_mmap2, struct mmap_arg_struct_emu31 __user *, arg) @@ -452,7 +452,7 @@ COMPAT_SYSCALL_DEFINE1(s390_mmap2, struct mmap_arg_struct_emu31 __user *, arg) if (copy_from_user(&a, arg, sizeof(a))) return -EFAULT; - return sys_mmap_pgoff(a.addr, a.len, a.prot, a.flags, a.fd, a.offset); + return ksys_mmap_pgoff(a.addr, a.len, a.prot, a.flags, a.fd, a.offset); } COMPAT_SYSCALL_DEFINE3(s390_read, unsigned int, fd, char __user *, buf, compat_size_t, count) diff --git a/arch/s390/kernel/sys_s390.c b/arch/s390/kernel/sys_s390.c index 0090037ab148..31cefe0c28c0 100644 --- a/arch/s390/kernel/sys_s390.c +++ b/arch/s390/kernel/sys_s390.c @@ -53,7 +53,7 @@ SYSCALL_DEFINE1(mmap2, struct s390_mmap_arg_struct __user *, arg) if (copy_from_user(&a, arg, sizeof(a))) goto out; - error = sys_mmap_pgoff(a.addr, a.len, a.prot, a.flags, a.fd, a.offset); + error = ksys_mmap_pgoff(a.addr, a.len, a.prot, a.flags, a.fd, a.offset); out: return error; } diff --git a/arch/sh/kernel/sys_sh.c b/arch/sh/kernel/sys_sh.c index 724911c59e7d..f8afc014e084 100644 --- a/arch/sh/kernel/sys_sh.c +++ b/arch/sh/kernel/sys_sh.c @@ -35,7 +35,7 @@ asmlinkage int old_mmap(unsigned long addr, unsigned long len, { if (off & ~PAGE_MASK) return -EINVAL; - return sys_mmap_pgoff(addr, len, prot, flags, fd, off>>PAGE_SHIFT); + return ksys_mmap_pgoff(addr, len, prot, flags, fd, off>>PAGE_SHIFT); } asmlinkage long sys_mmap2(unsigned long addr, unsigned long len, @@ -51,7 +51,7 @@ asmlinkage long sys_mmap2(unsigned long addr, unsigned long len, pgoff >>= PAGE_SHIFT - 12; - return sys_mmap_pgoff(addr, len, prot, flags, fd, pgoff); + return ksys_mmap_pgoff(addr, len, prot, flags, fd, pgoff); } /* sys_cacheflush -- flush (part of) the processor cache. */ diff --git a/arch/sparc/kernel/sys_sparc_32.c b/arch/sparc/kernel/sys_sparc_32.c index 990703b7cf4d..d980da4ffd7b 100644 --- a/arch/sparc/kernel/sys_sparc_32.c +++ b/arch/sparc/kernel/sys_sparc_32.c @@ -104,8 +104,8 @@ asmlinkage long sys_mmap2(unsigned long addr, unsigned long len, { /* Make sure the shift for mmap2 is constant (12), no matter what PAGE_SIZE we have. */ - return sys_mmap_pgoff(addr, len, prot, flags, fd, - pgoff >> (PAGE_SHIFT - 12)); + return ksys_mmap_pgoff(addr, len, prot, flags, fd, + pgoff >> (PAGE_SHIFT - 12)); } asmlinkage long sys_mmap(unsigned long addr, unsigned long len, @@ -113,7 +113,7 @@ asmlinkage long sys_mmap(unsigned long addr, unsigned long len, unsigned long off) { /* no alignment check? */ - return sys_mmap_pgoff(addr, len, prot, flags, fd, off >> PAGE_SHIFT); + return ksys_mmap_pgoff(addr, len, prot, flags, fd, off >> PAGE_SHIFT); } long sparc_remap_file_pages(unsigned long start, unsigned long size, diff --git a/arch/sparc/kernel/sys_sparc_64.c b/arch/sparc/kernel/sys_sparc_64.c index 55416db482ad..ebb84dc8a5a7 100644 --- a/arch/sparc/kernel/sys_sparc_64.c +++ b/arch/sparc/kernel/sys_sparc_64.c @@ -458,7 +458,7 @@ SYSCALL_DEFINE6(mmap, unsigned long, addr, unsigned long, len, goto out; if (off & ~PAGE_MASK) goto out; - retval = sys_mmap_pgoff(addr, len, prot, flags, fd, off >> PAGE_SHIFT); + retval = ksys_mmap_pgoff(addr, len, prot, flags, fd, off >> PAGE_SHIFT); out: return retval; } diff --git a/arch/um/kernel/syscall.c b/arch/um/kernel/syscall.c index 6258676bed85..35f7047bdebc 100644 --- a/arch/um/kernel/syscall.c +++ b/arch/um/kernel/syscall.c @@ -22,7 +22,7 @@ long old_mmap(unsigned long addr, unsigned long len, if (offset & ~PAGE_MASK) goto out; - err = sys_mmap_pgoff(addr, len, prot, flags, fd, offset >> PAGE_SHIFT); + err = ksys_mmap_pgoff(addr, len, prot, flags, fd, offset >> PAGE_SHIFT); out: return err; } diff --git a/arch/x86/ia32/sys_ia32.c b/arch/x86/ia32/sys_ia32.c index 2afd718e7422..ca28ee07a191 100644 --- a/arch/x86/ia32/sys_ia32.c +++ b/arch/x86/ia32/sys_ia32.c @@ -164,7 +164,7 @@ COMPAT_SYSCALL_DEFINE1(x86_mmap, struct mmap_arg_struct32 __user *, arg) if (a.offset & ~PAGE_MASK) return -EINVAL; - return sys_mmap_pgoff(a.addr, a.len, a.prot, a.flags, a.fd, + return ksys_mmap_pgoff(a.addr, a.len, a.prot, a.flags, a.fd, a.offset>>PAGE_SHIFT); } diff --git a/arch/x86/kernel/sys_x86_64.c b/arch/x86/kernel/sys_x86_64.c index 676774b9bb8d..a3f15ed545b5 100644 --- a/arch/x86/kernel/sys_x86_64.c +++ b/arch/x86/kernel/sys_x86_64.c @@ -97,7 +97,7 @@ SYSCALL_DEFINE6(mmap, unsigned long, addr, unsigned long, len, if (off & ~PAGE_MASK) goto out; - error = sys_mmap_pgoff(addr, len, prot, flags, fd, off >> PAGE_SHIFT); + error = ksys_mmap_pgoff(addr, len, prot, flags, fd, off >> PAGE_SHIFT); out: return error; } diff --git a/include/linux/syscalls.h b/include/linux/syscalls.h index 863ca7d6face..37b311393bdc 100644 --- a/include/linux/syscalls.h +++ b/include/linux/syscalls.h @@ -964,5 +964,8 @@ static inline int ksys_fadvise64_64(int fd, loff_t offset, loff_t len, return -EINVAL; } #endif +unsigned long ksys_mmap_pgoff(unsigned long addr, unsigned long len, + unsigned long prot, unsigned long flags, + unsigned long fd, unsigned long pgoff); #endif diff --git a/mm/mmap.c b/mm/mmap.c index 9efdc021ad22..aa0dc8231c0d 100644 --- a/mm/mmap.c +++ b/mm/mmap.c @@ -1488,9 +1488,9 @@ unsigned long do_mmap(struct file *file, unsigned long addr, return addr; } -SYSCALL_DEFINE6(mmap_pgoff, unsigned long, addr, unsigned long, len, - unsigned long, prot, unsigned long, flags, - unsigned long, fd, unsigned long, pgoff) +unsigned long ksys_mmap_pgoff(unsigned long addr, unsigned long len, + unsigned long prot, unsigned long flags, + unsigned long fd, unsigned long pgoff) { struct file *file = NULL; unsigned long retval; @@ -1537,6 +1537,13 @@ SYSCALL_DEFINE6(mmap_pgoff, unsigned long, addr, unsigned long, len, return retval; } +SYSCALL_DEFINE6(mmap_pgoff, unsigned long, addr, unsigned long, len, + unsigned long, prot, unsigned long, flags, + unsigned long, fd, unsigned long, pgoff) +{ + return ksys_mmap_pgoff(addr, len, prot, flags, fd, pgoff); +} + #ifdef __ARCH_WANT_SYS_OLD_MMAP struct mmap_arg_struct { unsigned long addr; @@ -1556,8 +1563,8 @@ SYSCALL_DEFINE1(old_mmap, struct mmap_arg_struct __user *, arg) if (offset_in_page(a.offset)) return -EINVAL; - return sys_mmap_pgoff(a.addr, a.len, a.prot, a.flags, a.fd, - a.offset >> PAGE_SHIFT); + return ksys_mmap_pgoff(a.addr, a.len, a.prot, a.flags, a.fd, + a.offset >> PAGE_SHIFT); } #endif /* __ARCH_WANT_SYS_OLD_MMAP */ diff --git a/mm/nommu.c b/mm/nommu.c index ebb6e618dade..cad329629530 100644 --- a/mm/nommu.c +++ b/mm/nommu.c @@ -1423,9 +1423,9 @@ unsigned long do_mmap(struct file *file, return -ENOMEM; } -SYSCALL_DEFINE6(mmap_pgoff, unsigned long, addr, unsigned long, len, - unsigned long, prot, unsigned long, flags, - unsigned long, fd, unsigned long, pgoff) +unsigned long ksys_mmap_pgoff(unsigned long addr, unsigned long len, + unsigned long prot, unsigned long flags, + unsigned long fd, unsigned long pgoff) { struct file *file = NULL; unsigned long retval = -EBADF; @@ -1447,6 +1447,13 @@ SYSCALL_DEFINE6(mmap_pgoff, unsigned long, addr, unsigned long, len, return retval; } +SYSCALL_DEFINE6(mmap_pgoff, unsigned long, addr, unsigned long, len, + unsigned long, prot, unsigned long, flags, + unsigned long, fd, unsigned long, pgoff) +{ + return ksys_mmap_pgoff(addr, len, prot, flags, fd, pgoff); +} + #ifdef __ARCH_WANT_SYS_OLD_MMAP struct mmap_arg_struct { unsigned long addr; @@ -1466,8 +1473,8 @@ SYSCALL_DEFINE1(old_mmap, struct mmap_arg_struct __user *, arg) if (offset_in_page(a.offset)) return -EINVAL; - return sys_mmap_pgoff(a.addr, a.len, a.prot, a.flags, a.fd, - a.offset >> PAGE_SHIFT); + return ksys_mmap_pgoff(a.addr, a.len, a.prot, a.flags, a.fd, + a.offset >> PAGE_SHIFT); } #endif /* __ARCH_WANT_SYS_OLD_MMAP */ -- 2.16.2