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Howlett" , Nico Pache , Ryan Roberts , Dev Jain , Barry Song , Lance Yang , Hugh Dickins , Vlastimil Babka , Mike Rapoport , Suren Baghdasaryan , Michal Hocko , Jann Horn , Pedro Falcato , Kees Cook , Jaroslav Kysela , Takashi Iwai , linux-mips@vger.kernel.org, linux-kernel@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, dri-devel@lists.freedesktop.org, etnaviv@lists.freedesktop.org, linux-arm-kernel@lists.infradead.org, linux-samsung-soc@vger.kernel.org, intel-gfx@lists.freedesktop.org, linux-arm-msm@vger.kernel.org, freedreno@lists.freedesktop.org, nouveau@lists.freedesktop.org, linux-rockchip@lists.infradead.org, linux-tegra@vger.kernel.org, virtualization@lists.linux.dev, intel-xe@lists.freedesktop.org, xen-devel@lists.xenproject.org, linux-fbdev@vger.kernel.org, linux-aio@kvack.org, linux-fsdevel@vger.kernel.org, linux-mm@kvack.org, linux-sound@vger.kernel.org Subject: [PATCH 04/13] mm: update generic_get_unmapped_area[_topdown]() to use vma_flags_t Date: Mon, 29 Jun 2026 20:25:27 +0100 Message-ID: X-Mailer: git-send-email 2.54.0 In-Reply-To: References: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Stat-Signature: s1xiuscymh6fjeeiap49grafgojsujux X-Rspam-User: X-Rspamd-Queue-Id: D3468180004 X-Rspamd-Server: rspam02 X-HE-Tag: 1782761168-169877 X-HE-Meta: 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 Zbt+yoTS 6ZuN47JaANTsMGviZB2HoB3pLPgNzwewK2nWh2u2YtPujdS6y3SEtTNtQKk8W3GKEwwOsF4D/hZu8uZjTx1r91TfZveeDqFAYcYf2c8jUkHtYg3OpazNgbpJBdoTjb2nHHSZIxcGRArGCj3DzjfNyb0qaSTfhTBWINB/R3hX6l2YNkf5PsqNUWB7FgZzHAq9xGcSj/GGWj6mD1XcplxRMsASO8R/w4BZLqH9546gOqNF9/VuwGZCVXS1CCi5fzztXbKjit5BUmp3O5a1A2HNOGzzhSg== Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: As part of the changes converting VMA flags from a system word size to a bitmap, extend this change to generic_get_unmapped_area() and generic_get_unmapped_area_topdown(), which also allows us to convert stack_guard_placement() as well. We retain arch_get_unmapped_area() and arch_get_unmapped_area_topdown() as-is for now, using legacy_to_vma_flags() as necessary to do so. No functional change intended. Signed-off-by: Lorenzo Stoakes --- arch/powerpc/mm/book3s64/slice.c | 6 ++++-- include/linux/sched/mm.h | 4 ++-- mm/mmap.c | 16 ++++++++-------- 3 files changed, 14 insertions(+), 12 deletions(-) diff --git a/arch/powerpc/mm/book3s64/slice.c b/arch/powerpc/mm/book3s64/slice.c index 28bec5bc7879..82127e31dca6 100644 --- a/arch/powerpc/mm/book3s64/slice.c +++ b/arch/powerpc/mm/book3s64/slice.c @@ -659,7 +659,8 @@ unsigned long arch_get_unmapped_area(struct file *filp, unsigned int psize; if (radix_enabled()) - return generic_get_unmapped_area(filp, addr, len, pgoff, flags, vm_flags); + return generic_get_unmapped_area(filp, addr, len, pgoff, flags, + legacy_to_vma_flags(vm_flags)); if (filp && is_file_hugepages(filp)) psize = file_to_psize(filp); @@ -679,7 +680,8 @@ unsigned long arch_get_unmapped_area_topdown(struct file *filp, unsigned int psize; if (radix_enabled()) - return generic_get_unmapped_area_topdown(filp, addr0, len, pgoff, flags, vm_flags); + return generic_get_unmapped_area_topdown(filp, addr0, len, + pgoff, flags, legacy_to_vma_flags(vm_flags)); if (filp && is_file_hugepages(filp)) psize = file_to_psize(filp); diff --git a/include/linux/sched/mm.h b/include/linux/sched/mm.h index b301ec90740a..c8720d8e2158 100644 --- a/include/linux/sched/mm.h +++ b/include/linux/sched/mm.h @@ -203,11 +203,11 @@ unsigned long mm_get_unmapped_area_vmaflags(struct file *filp, unsigned long generic_get_unmapped_area(struct file *filp, unsigned long addr, unsigned long len, unsigned long pgoff, - unsigned long flags, vm_flags_t vm_flags); + unsigned long flags, vma_flags_t vma_flags); unsigned long generic_get_unmapped_area_topdown(struct file *filp, unsigned long addr, unsigned long len, unsigned long pgoff, - unsigned long flags, vm_flags_t vm_flags); + unsigned long flags, vma_flags_t vma_flags); #else static inline void arch_pick_mmap_layout(struct mm_struct *mm, const struct rlimit *rlim_stack) {} diff --git a/mm/mmap.c b/mm/mmap.c index 461ce510e12a..3ef603d5ff00 100644 --- a/mm/mmap.c +++ b/mm/mmap.c @@ -657,9 +657,9 @@ SYSCALL_DEFINE1(old_mmap, struct mmap_arg_struct __user *, arg) * Determine if the allocation needs to ensure that there is no * existing mapping within it's guard gaps, for use as start_gap. */ -static inline unsigned long stack_guard_placement(vm_flags_t vm_flags) +static inline unsigned long stack_guard_placement(vma_flags_t vma_flags) { - if (vm_flags & VM_SHADOW_STACK) + if (vma_flags_test_single_mask(&vma_flags, VMA_SHADOW_STACK)) return PAGE_SIZE; return 0; @@ -701,7 +701,7 @@ unsigned long vm_unmapped_area(struct vm_unmapped_area_info *info) unsigned long generic_get_unmapped_area(struct file *filp, unsigned long addr, unsigned long len, unsigned long pgoff, - unsigned long flags, vm_flags_t vm_flags) + unsigned long flags, vma_flags_t vma_flags) { struct mm_struct *mm = current->mm; struct vm_area_struct *vma, *prev; @@ -726,7 +726,7 @@ generic_get_unmapped_area(struct file *filp, unsigned long addr, info.length = len; info.low_limit = mm->mmap_base; info.high_limit = mmap_end; - info.start_gap = stack_guard_placement(vm_flags); + info.start_gap = stack_guard_placement(vma_flags); if (filp && is_file_hugepages(filp)) info.align_mask = huge_page_mask_align(filp); return vm_unmapped_area(&info); @@ -739,7 +739,7 @@ arch_get_unmapped_area(struct file *filp, unsigned long addr, unsigned long flags, vm_flags_t vm_flags) { return generic_get_unmapped_area(filp, addr, len, pgoff, flags, - vm_flags); + legacy_to_vma_flags(vm_flags)); } #endif @@ -750,7 +750,7 @@ arch_get_unmapped_area(struct file *filp, unsigned long addr, unsigned long generic_get_unmapped_area_topdown(struct file *filp, unsigned long addr, unsigned long len, unsigned long pgoff, - unsigned long flags, vm_flags_t vm_flags) + unsigned long flags, vma_flags_t vma_flags) { struct vm_area_struct *vma, *prev; struct mm_struct *mm = current->mm; @@ -778,7 +778,7 @@ generic_get_unmapped_area_topdown(struct file *filp, unsigned long addr, info.length = len; info.low_limit = PAGE_SIZE; info.high_limit = arch_get_mmap_base(addr, mm->mmap_base); - info.start_gap = stack_guard_placement(vm_flags); + info.start_gap = stack_guard_placement(vma_flags); if (filp && is_file_hugepages(filp)) info.align_mask = huge_page_mask_align(filp); addr = vm_unmapped_area(&info); @@ -807,7 +807,7 @@ arch_get_unmapped_area_topdown(struct file *filp, unsigned long addr, unsigned long flags, vm_flags_t vm_flags) { return generic_get_unmapped_area_topdown(filp, addr, len, pgoff, flags, - vm_flags); + legacy_to_vma_flags(vm_flags)); } #endif -- 2.54.0