From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mgamail.intel.com (mgamail.intel.com [192.198.163.9]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 342921552F7; Mon, 6 May 2024 16:07:59 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=192.198.163.9 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1715011681; cv=none; b=XP1meAl8ALlbKEB1+GoIxH3XXtCol/5Azz6ekV0YKzaRPkOZpooXxnuOd7/SzSvlizxBUgP2nVgnCK4ThwbnHkm1CoseZKbAiTx+fCvtI/Me6vQK9/Vddck9VvYhH9xEYdFi5dvMPY60UGnYJru0wTxdPaev4lJxYQWHB0IdeWU= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1715011681; c=relaxed/simple; bh=2IOd66RSOqQqrKQkuMh3XogGiLvLLMV7lnIQ5ZnGbPE=; h=From:To:Cc:Subject:Date:Message-Id:MIME-Version; b=ab+S3ejjGcxj4AmsJYFwHp1MJ4UeIqbizPvsOHQ+JUzWEi7gxTAl5fcSlM7/bj3HmrWP9mSa/5epd+xCS1HcqFVb+leMOnPQTJCc7C5xtwAEmDjx8MgJ3n+yvRNb+v4erKGANSsZuJ6HiaH/7evuEYtmnd19B0ueSzRe7Mhdv+Q= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=intel.com; spf=pass smtp.mailfrom=intel.com; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b=mdcM3M4J; arc=none smtp.client-ip=192.198.163.9 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=intel.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=intel.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b="mdcM3M4J" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1715011679; x=1746547679; h=from:to:cc:subject:date:message-id:mime-version: content-transfer-encoding; bh=2IOd66RSOqQqrKQkuMh3XogGiLvLLMV7lnIQ5ZnGbPE=; b=mdcM3M4JAswq+Hj/4Jf8yuJJzZ01cw/1YIbVCq41wSpETdlk/y+wCCKG Zm5wngIWty+CYyYkYBxJboRiH5P5Sp7aMxzCLDqTo+c4sWsxLXg0gx0iZ ICjxPI7MQGO4zSU25v8UzZkJVkuasCkw+113Id0SpRZecPk/3CK4JUCL2 X2Gp/ANFecJKEF7RfXSUX5GxkGd3k1fJeXjnni6M/P+yMGpWIG6PZcOqK AQuzxwxWUTTCuBffe/10Q4i3vtKMFf3Fwd6/YQr79alcEMS7Rrek/qjga OmWUC8WaxWZlYmWg7BWc5+uBSNvvny8mI8bPfuX9l+Eq9r5VkSyxvBgJb Q==; X-CSE-ConnectionGUID: NLhT/Lx7Qmu2o7wZa+FILQ== X-CSE-MsgGUID: BDduzWQaQ6Knn/Zh12Op3g== X-IronPort-AV: E=McAfee;i="6600,9927,11065"; a="21440400" X-IronPort-AV: E=Sophos;i="6.07,258,1708416000"; d="scan'208";a="21440400" Received: from fmviesa003.fm.intel.com ([10.60.135.143]) by fmvoesa103.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 06 May 2024 09:07:58 -0700 X-CSE-ConnectionGUID: u2l7s34lSJ6s3YOUXNviqw== X-CSE-MsgGUID: +dIdv11yQnK7uo5bWilyRQ== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.07,258,1708416000"; d="scan'208";a="32705046" Received: from haabdall-mobl.amr.corp.intel.com (HELO rpedgeco-desk4.intel.com) ([10.209.82.8]) by fmviesa003-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 06 May 2024 09:07:57 -0700 From: Rick Edgecombe To: akpm@linux-foundation.org Cc: rick.p.edgecombe@intel.com, Liam.Howlett@oracle.com, bp@alien8.de, bpf@vger.kernel.org, broonie@kernel.org, christophe.leroy@csgroup.eu, dan.j.williams@intel.com, dave.hansen@linux.intel.com, debug@rivosinc.com, hpa@zytor.com, io-uring@vger.kernel.org, keescook@chromium.org, kirill.shutemov@linux.intel.com, linux-cxl@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org, linux-s390@vger.kernel.org, linux-sgx@vger.kernel.org, luto@kernel.org, mingo@redhat.com, nvdimm@lists.linux.dev, peterz@infradead.org, sparclinux@vger.kernel.org, tglx@linutronix.de, x86@kernel.org Subject: [PATCH] mm: Remove mm argument from mm_get_unmapped_area() Date: Mon, 6 May 2024 09:07:47 -0700 Message-Id: <20240506160747.1321726-1-rick.p.edgecombe@intel.com> X-Mailer: git-send-email 2.34.1 Precedence: bulk X-Mailing-List: io-uring@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Recently the get_unmapped_area() pointer on mm_struct was removed in favor of direct callable function that can determines which of two handlers to call based on an mm flag. This function, mm_get_unmapped_area(), checks the flag of the mm passed as an argument. Dan Williams pointed out (see link) that all callers pass curret->mm, so the mm argument is unneeded. It could be conceivable for a caller to want to pass a different mm in the future, but in this case a new helper could easily be added. So remove the mm argument, and rename the function current_get_unmapped_area(). Fixes: 529ce23a764f ("mm: switch mm->get_unmapped_area() to a flag") Suggested-by: Dan Williams Signed-off-by: Rick Edgecombe Link: https://lore.kernel.org/lkml/6603bed6662a_4a98a2949e@dwillia2-mobl3.amr.corp.intel.com.notmuch/ --- Based on linux-next. --- arch/sparc/kernel/sys_sparc_64.c | 9 +++++---- arch/x86/kernel/cpu/sgx/driver.c | 2 +- drivers/char/mem.c | 2 +- drivers/dax/device.c | 6 +++--- fs/proc/inode.c | 2 +- fs/ramfs/file-mmu.c | 2 +- include/linux/sched/mm.h | 6 +++--- io_uring/memmap.c | 2 +- kernel/bpf/arena.c | 2 +- kernel/bpf/syscall.c | 2 +- mm/mmap.c | 11 +++++------ mm/shmem.c | 9 ++++----- 12 files changed, 27 insertions(+), 28 deletions(-) diff --git a/arch/sparc/kernel/sys_sparc_64.c b/arch/sparc/kernel/sys_sparc_64.c index d9c3b34ca744..cf0b4ace5bf9 100644 --- a/arch/sparc/kernel/sys_sparc_64.c +++ b/arch/sparc/kernel/sys_sparc_64.c @@ -220,7 +220,7 @@ unsigned long get_fb_unmapped_area(struct file *filp, unsigned long orig_addr, u if (flags & MAP_FIXED) { /* Ok, don't mess with it. */ - return mm_get_unmapped_area(current->mm, NULL, orig_addr, len, pgoff, flags); + return current_get_unmapped_area(NULL, orig_addr, len, pgoff, flags); } flags &= ~MAP_SHARED; @@ -233,8 +233,9 @@ unsigned long get_fb_unmapped_area(struct file *filp, unsigned long orig_addr, u align_goal = (64UL * 1024); do { - addr = mm_get_unmapped_area(current->mm, NULL, orig_addr, - len + (align_goal - PAGE_SIZE), pgoff, flags); + addr = current_get_unmapped_area(NULL, orig_addr, + len + (align_goal - PAGE_SIZE), + pgoff, flags); if (!(addr & ~PAGE_MASK)) { addr = (addr + (align_goal - 1UL)) & ~(align_goal - 1UL); break; @@ -252,7 +253,7 @@ unsigned long get_fb_unmapped_area(struct file *filp, unsigned long orig_addr, u * be obtained. */ if (addr & ~PAGE_MASK) - addr = mm_get_unmapped_area(current->mm, NULL, orig_addr, len, pgoff, flags); + addr = current_get_unmapped_area(NULL, orig_addr, len, pgoff, flags); return addr; } diff --git a/arch/x86/kernel/cpu/sgx/driver.c b/arch/x86/kernel/cpu/sgx/driver.c index 22b65a5f5ec6..5f7bfd9035f7 100644 --- a/arch/x86/kernel/cpu/sgx/driver.c +++ b/arch/x86/kernel/cpu/sgx/driver.c @@ -113,7 +113,7 @@ static unsigned long sgx_get_unmapped_area(struct file *file, if (flags & MAP_FIXED) return addr; - return mm_get_unmapped_area(current->mm, file, addr, len, pgoff, flags); + return current_get_unmapped_area(file, addr, len, pgoff, flags); } #ifdef CONFIG_COMPAT diff --git a/drivers/char/mem.c b/drivers/char/mem.c index 7c359cc406d5..a29c4bd506d5 100644 --- a/drivers/char/mem.c +++ b/drivers/char/mem.c @@ -546,7 +546,7 @@ static unsigned long get_unmapped_area_zero(struct file *file, } /* Otherwise flags & MAP_PRIVATE: with no shmem object beneath it */ - return mm_get_unmapped_area(current->mm, file, addr, len, pgoff, flags); + return current_get_unmapped_area(file, addr, len, pgoff, flags); #else return -ENOSYS; #endif diff --git a/drivers/dax/device.c b/drivers/dax/device.c index eb61598247a9..c379902307b7 100644 --- a/drivers/dax/device.c +++ b/drivers/dax/device.c @@ -329,14 +329,14 @@ static unsigned long dax_get_unmapped_area(struct file *filp, if ((off + len_align) < off) goto out; - addr_align = mm_get_unmapped_area(current->mm, filp, addr, len_align, - pgoff, flags); + addr_align = current_get_unmapped_area(filp, addr, len_align, + pgoff, flags); if (!IS_ERR_VALUE(addr_align)) { addr_align += (off - addr_align) & (align - 1); return addr_align; } out: - return mm_get_unmapped_area(current->mm, filp, addr, len, pgoff, flags); + return current_get_unmapped_area(filp, addr, len, pgoff, flags); } static const struct address_space_operations dev_dax_aops = { diff --git a/fs/proc/inode.c b/fs/proc/inode.c index d19434e2a58e..24a6aeac3de5 100644 --- a/fs/proc/inode.c +++ b/fs/proc/inode.c @@ -455,7 +455,7 @@ pde_get_unmapped_area(struct proc_dir_entry *pde, struct file *file, unsigned lo return pde->proc_ops->proc_get_unmapped_area(file, orig_addr, len, pgoff, flags); #ifdef CONFIG_MMU - return mm_get_unmapped_area(current->mm, file, orig_addr, len, pgoff, flags); + return current_get_unmapped_area(file, orig_addr, len, pgoff, flags); #endif return orig_addr; diff --git a/fs/ramfs/file-mmu.c b/fs/ramfs/file-mmu.c index b45c7edc3225..85f57de31102 100644 --- a/fs/ramfs/file-mmu.c +++ b/fs/ramfs/file-mmu.c @@ -35,7 +35,7 @@ static unsigned long ramfs_mmu_get_unmapped_area(struct file *file, unsigned long addr, unsigned long len, unsigned long pgoff, unsigned long flags) { - return mm_get_unmapped_area(current->mm, file, addr, len, pgoff, flags); + return current_get_unmapped_area(file, addr, len, pgoff, flags); } const struct file_operations ramfs_file_operations = { diff --git a/include/linux/sched/mm.h b/include/linux/sched/mm.h index 91546493c43d..c67c7de05c7a 100644 --- a/include/linux/sched/mm.h +++ b/include/linux/sched/mm.h @@ -187,9 +187,9 @@ arch_get_unmapped_area_topdown(struct file *filp, unsigned long addr, unsigned long len, unsigned long pgoff, unsigned long flags); -unsigned long mm_get_unmapped_area(struct mm_struct *mm, struct file *filp, - unsigned long addr, unsigned long len, - unsigned long pgoff, unsigned long flags); +unsigned long current_get_unmapped_area(struct file *filp, unsigned long addr, + unsigned long len, unsigned long pgoff, + unsigned long flags); unsigned long arch_get_unmapped_area_vmflags(struct file *filp, unsigned long addr, diff --git a/io_uring/memmap.c b/io_uring/memmap.c index 4785d6af5fee..1aaea32c797c 100644 --- a/io_uring/memmap.c +++ b/io_uring/memmap.c @@ -305,7 +305,7 @@ unsigned long io_uring_get_unmapped_area(struct file *filp, unsigned long addr, #else addr = 0UL; #endif - return mm_get_unmapped_area(current->mm, filp, addr, len, pgoff, flags); + return current_get_unmapped_area(filp, addr, len, pgoff, flags); } #else /* !CONFIG_MMU */ diff --git a/kernel/bpf/arena.c b/kernel/bpf/arena.c index 4a1be699bb82..054486f7c453 100644 --- a/kernel/bpf/arena.c +++ b/kernel/bpf/arena.c @@ -314,7 +314,7 @@ static unsigned long arena_get_unmapped_area(struct file *filp, unsigned long ad return -EINVAL; } - ret = mm_get_unmapped_area(current->mm, filp, addr, len * 2, 0, flags); + ret = current_get_unmapped_area(filp, addr, len * 2, 0, flags); if (IS_ERR_VALUE(ret)) return ret; if ((ret >> 32) == ((ret + len - 1) >> 32)) diff --git a/kernel/bpf/syscall.c b/kernel/bpf/syscall.c index 2222c3ff88e7..d9ff2843f6ef 100644 --- a/kernel/bpf/syscall.c +++ b/kernel/bpf/syscall.c @@ -992,7 +992,7 @@ static unsigned long bpf_get_unmapped_area(struct file *filp, unsigned long addr if (map->ops->map_get_unmapped_area) return map->ops->map_get_unmapped_area(filp, addr, len, pgoff, flags); #ifdef CONFIG_MMU - return mm_get_unmapped_area(current->mm, filp, addr, len, pgoff, flags); + return current_get_unmapped_area(filp, addr, len, pgoff, flags); #else return addr; #endif diff --git a/mm/mmap.c b/mm/mmap.c index 83b4682ec85c..4e98a907c53d 100644 --- a/mm/mmap.c +++ b/mm/mmap.c @@ -1901,16 +1901,15 @@ __get_unmapped_area(struct file *file, unsigned long addr, unsigned long len, return error ? error : addr; } -unsigned long -mm_get_unmapped_area(struct mm_struct *mm, struct file *file, - unsigned long addr, unsigned long len, - unsigned long pgoff, unsigned long flags) +unsigned long current_get_unmapped_area(struct file *file, unsigned long addr, + unsigned long len, unsigned long pgoff, + unsigned long flags) { - if (test_bit(MMF_TOPDOWN, &mm->flags)) + if (test_bit(MMF_TOPDOWN, ¤t->mm->flags)) return arch_get_unmapped_area_topdown(file, addr, len, pgoff, flags); return arch_get_unmapped_area(file, addr, len, pgoff, flags); } -EXPORT_SYMBOL(mm_get_unmapped_area); +EXPORT_SYMBOL(current_get_unmapped_area); /** * find_vma_intersection() - Look up the first VMA which intersects the interval diff --git a/mm/shmem.c b/mm/shmem.c index f5d60436b604..c0acd7db93c8 100644 --- a/mm/shmem.c +++ b/mm/shmem.c @@ -2276,8 +2276,7 @@ unsigned long shmem_get_unmapped_area(struct file *file, if (len > TASK_SIZE) return -ENOMEM; - addr = mm_get_unmapped_area(current->mm, file, uaddr, len, pgoff, - flags); + addr = current_get_unmapped_area(file, uaddr, len, pgoff, flags); if (!IS_ENABLED(CONFIG_TRANSPARENT_HUGEPAGE)) return addr; @@ -2334,8 +2333,8 @@ unsigned long shmem_get_unmapped_area(struct file *file, if (inflated_len < len) return addr; - inflated_addr = mm_get_unmapped_area(current->mm, NULL, uaddr, - inflated_len, 0, flags); + inflated_addr = current_get_unmapped_area(NULL, uaddr, + inflated_len, 0, flags); if (IS_ERR_VALUE(inflated_addr)) return addr; if (inflated_addr & ~PAGE_MASK) @@ -4799,7 +4798,7 @@ unsigned long shmem_get_unmapped_area(struct file *file, unsigned long addr, unsigned long len, unsigned long pgoff, unsigned long flags) { - return mm_get_unmapped_area(current->mm, file, addr, len, pgoff, flags); + return current_get_unmapped_area(file, addr, len, pgoff, flags); } #endif base-commit: 9221b2819b8a4196eecf5476d66201be60fbcf29 -- 2.34.1