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| author | Joerg Roedel <[email protected]> | 2020-08-14 15:19:46 +0000 |
|---|---|---|
| committer | Ingo Molnar <[email protected]> | 2020-08-15 11:56:16 +0000 |
| commit | 58a18fe95e83b8396605154db04d73b08063f31b (patch) | |
| tree | 87dbd81e38748e1e7f5a73de5b6c850f57def447 /drivers/gpu/drm/amd/amdgpu/amdgpu_gem.c | |
| parent | Merge tag 'scsi-misc' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi (diff) | |
| download | kernel-58a18fe95e83b8396605154db04d73b08063f31b.tar.gz kernel-58a18fe95e83b8396605154db04d73b08063f31b.zip | |
x86/mm/64: Do not sync vmalloc/ioremap mappings
Remove the code to sync the vmalloc and ioremap ranges for x86-64. The
page-table pages are all pre-allocated so that synchronization is
no longer necessary.
This is a patch that already went into the kernel as:
commit 8bb9bf242d1f ("x86/mm/64: Do not sync vmalloc/ioremap mappings")
But it had to be reverted later because it unveiled a bug from:
commit 6eb82f994026 ("x86/mm: Pre-allocate P4D/PUD pages for vmalloc area")
The bug in that commit causes the P4D/PUD pages not to be correctly
allocated, making the synchronization still necessary. That issue got
fixed meanwhile upstream:
commit 995909a4e22b ("x86/mm/64: Do not dereference non-present PGD entries")
With that fix it is safe again to remove the page-table synchronization
for vmalloc/ioremap ranges on x86-64.
Signed-off-by: Joerg Roedel <[email protected]>
Signed-off-by: Ingo Molnar <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Diffstat (limited to 'drivers/gpu/drm/amd/amdgpu/amdgpu_gem.c')
0 files changed, 0 insertions, 0 deletions