diff options
| author | Tiwei Bie <tiwei.btw@antgroup.com> | 2025-10-27 13:45:19 +0800 |
|---|---|---|
| committer | Johannes Berg <johannes.berg@intel.com> | 2025-10-27 16:37:12 +0100 |
| commit | a7f7dbae94a5ae5cfbf2375e0d952c54b069fd7f (patch) | |
| tree | c15eb929ac9ad8fcff505b3faa7b6868a853fc26 /arch/um/kernel/um_arch.c | |
| parent | 9c84022c1d1f0cfd8f02fa8e2b275ccd361891d2 (diff) | |
um: Remove file-based iomem emulation support
The file-based iomem emulation was introduced to support writing
paravirtualized drivers based on emulated iomem regions. However,
the only driver that makes use of it is an example driver called
mmapper, which was written over two decades ago.
We now have several modern device emulation mechanisms, such as
vhost-user-based virtio-uml. Remove the file-based iomem emulation
support to reduce the maintenance burden.
Signed-off-by: Tiwei Bie <tiwei.btw@antgroup.com>
Link: https://patch.msgid.link/20251027054519.1996090-5-tiwei.bie@linux.dev
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Diffstat (limited to 'arch/um/kernel/um_arch.c')
| -rw-r--r-- | arch/um/kernel/um_arch.c | 7 |
1 files changed, 1 insertions, 6 deletions
diff --git a/arch/um/kernel/um_arch.c b/arch/um/kernel/um_arch.c index 6f9a49e6c6a0..cf06bb732ed8 100644 --- a/arch/um/kernel/um_arch.c +++ b/arch/um/kernel/um_arch.c @@ -253,8 +253,6 @@ unsigned long task_size; EXPORT_SYMBOL(task_size); unsigned long brk_start; -unsigned long end_iomem; -EXPORT_SYMBOL(end_iomem); #define MIN_VMALLOC (32 * 1024 * 1024) @@ -363,9 +361,7 @@ int __init linux_main(int argc, char **argv, char **envp) setup_machinename(init_utsname()->machine); physmem_size = PAGE_ALIGN(physmem_size); - iomem_size = PAGE_ALIGN(iomem_size); - - max_physmem = TASK_SIZE - uml_physmem - iomem_size - MIN_VMALLOC; + max_physmem = TASK_SIZE - uml_physmem - MIN_VMALLOC; if (physmem_size > max_physmem) { physmem_size = max_physmem; os_info("Physical memory size shrunk to %llu bytes\n", @@ -373,7 +369,6 @@ int __init linux_main(int argc, char **argv, char **envp) } high_physmem = uml_physmem + physmem_size; - end_iomem = high_physmem + iomem_size; start_vm = VMALLOC_START; |