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Date: Thu, 26 Jul 2007 20:06:15 +0100 From: David Howells <dhowells@...hat.com> To: torvalds@...l.org, akpm@...l.org, npiggin@...e.de Cc: linux-kernel@...r.kernel.org, uclinux-dev@...inux.org, dhowells@...hat.com Subject: [PATCH] NOMMU: Fix SYSV IPC SHM From: David Howells <dhowells@...hat.com> Fix the SYSV IPC SHM to work with the changes applied by the new fault handler patches when CONFIG_MMU=n. Signed-off-by: David Howells <dhowells@...hat.com> --- fs/ramfs/file-nommu.c | 7 ++++++- ipc/shm.c | 2 ++ 2 files changed, 8 insertions(+), 1 deletions(-) diff --git a/fs/ramfs/file-nommu.c b/fs/ramfs/file-nommu.c index cad2b7a..237fe8b 100644 --- a/fs/ramfs/file-nommu.c +++ b/fs/ramfs/file-nommu.c @@ -295,5 +295,10 @@ unsigned long ramfs_nommu_get_unmapped_area(struct file *file, */ int ramfs_nommu_mmap(struct file *file, struct vm_area_struct *vma) { - return vma->vm_flags & VM_SHARED ? 0 : -ENOSYS; + if (!(vma->vm_flags & VM_SHARED)) + return -ENOSYS; + + file_accessed(file); + vma->vm_ops = &generic_file_vm_ops; + return 0; } diff --git a/ipc/shm.c b/ipc/shm.c index d0259e3..d88ac5a 100644 --- a/ipc/shm.c +++ b/ipc/shm.c @@ -268,7 +268,9 @@ static int shm_mmap(struct file * file, struct vm_area_struct * vma) if (ret != 0) return ret; sfd->vm_ops = vma->vm_ops; +#ifdef CONFIG_MMU BUG_ON(!sfd->vm_ops->fault); +#endif vma->vm_ops = &shm_vm_ops; shm_open(vma); - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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