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| author |   Johannes Berg <johannes.berg@intel.com> | 2021-01-10 19:05:09 +0100 |
|---|---|---|
| committer |   Richard Weinberger <richard@nod.at> | 2021-01-26 22:11:38 +0100 |
| commit | a31e9c4e7247d182192e9b85abbea498d63dd850 (patch) | |
| tree | 35c289fd8b81c74b8d49177566eb35f552e2ebe6 /arch/um/Kconfig | |
| parent | Revert "um: allocate a guard page to helper threads" (diff) | |
| download | linux-dev-a31e9c4e7247d182192e9b85abbea498d63dd850.tar.xz linux-dev-a31e9c4e7247d182192e9b85abbea498d63dd850.zip | |
Revert "um: support some of ARCH_HAS_SET_MEMORY"
This reverts commit 963285b0b47a ("um: support some of
ARCH_HAS_SET_MEMORY"), as it turns out that it's not only not
working (due to um never using the protection bits in the
page tables) but also corrupts the page tables if used on a
non-vmalloc page, since um never allocates proper page tables
for the 'physmem' in the first place.
Fixing all this will take more effort, so for now revert it.
Reported-by: Benjamin Berg <benjamin@sipsolutions.net>
Fixes: 963285b0b47a ("um: support some of ARCH_HAS_SET_MEMORY")
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Richard Weinberger <richard@nod.at>
Diffstat (limited to 'arch/um/Kconfig')
| -rw-r--r-- | arch/um/Kconfig | 1 |
1 files changed, 0 insertions, 1 deletions
diff --git a/arch/um/Kconfig b/arch/um/Kconfig index 34d302d1a07f..c3030db3325f 100644 --- a/arch/um/Kconfig +++ b/arch/um/Kconfig @@ -15,7 +15,6 @@ config UML select HAVE_DEBUG_KMEMLEAK select HAVE_DEBUG_BUGVERBOSE select NO_DMA - select ARCH_HAS_SET_MEMORY select GENERIC_IRQ_SHOW select GENERIC_CPU_DEVICES select HAVE_GCC_PLUGINS |