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| author | Joerg Roedel <jroedel@suse.de> | 2019-07-19 20:46:51 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2019-08-25 10:52:43 +0200 |
| commit | 547922a27fe4aeb02e6f04247aec5c476f2c111a (patch) | |
| tree | 1e7a2a06d55195d406a87bbd679e6038866a8e8c /mm/vmalloc.c | |
| parent | dc2b262c02bb73ea7655d7ea389dd9f181b43a02 (diff) | |
x86/mm: Sync also unmappings in vmalloc_sync_all()
commit 8e998fc24de47c55b47a887f6c95ab91acd4a720 upstream.
With huge-page ioremap areas the unmappings also need to be synced between
all page-tables. Otherwise it can cause data corruption when a region is
unmapped and later re-used.
Make the vmalloc_sync_one() function ready to sync unmappings and make sure
vmalloc_sync_all() iterates over all page-tables even when an unmapped PMD
is found.
Fixes: 5d72b4fba40ef ('x86, mm: support huge I/O mapping capability I/F')
Signed-off-by: Joerg Roedel <jroedel@suse.de>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Dave Hansen <dave.hansen@linux.intel.com>
Link: https://lkml.kernel.org/r/20190719184652.11391-3-joro@8bytes.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'mm/vmalloc.c')
0 files changed, 0 insertions, 0 deletions