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| author | Helge Deller <deller@gmx.de> | 2019-01-04 23:32:53 +0100 |
|---|---|---|
| committer | Helge Deller <deller@gmx.de> | 2019-01-05 00:39:30 +0100 |
| commit | dfbaecb2b707cfdc5276b548d52b437384bd6483 (patch) | |
| tree | 355417d44713e46a8f3465bec980ac04ed851275 /arch/parisc | |
| parent | 0b2c8f8b6b0c7530e2866c95862546d0da2057b0 (diff) | |
| download | linux-0-day-dfbaecb2b707cfdc5276b548d52b437384bd6483.tar.gz linux-0-day-dfbaecb2b707cfdc5276b548d52b437384bd6483.tar.xz | |
parisc: Remap hugepage-aligned pages in set_kernel_text_rw()
The alternative coding patch for parisc in kernel 4.20 broke booting
machines with PA8500-PA8700 CPUs. The problem is, that for such machines
the parisc kernel automatically utilizes huge pages to access kernel
text code, but the set_kernel_text_rw() function, which is used shortly
before applying any alternative patches, didn't used the correctly
hugepage-aligned addresses to remap the kernel text read-writeable.
Fixes: 3847dab77421 ("parisc: Add alternative coding infrastructure")
Cc: <stable@vger.kernel.org> [4.20]
Signed-off-by: Helge Deller <deller@gmx.de>
Diffstat (limited to 'arch/parisc')
| -rw-r--r-- | arch/parisc/mm/init.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/arch/parisc/mm/init.c b/arch/parisc/mm/init.c index 2d7cffcaa476e..059187a3ded74 100644 --- a/arch/parisc/mm/init.c +++ b/arch/parisc/mm/init.c @@ -512,8 +512,8 @@ static void __init map_pages(unsigned long start_vaddr, void __init set_kernel_text_rw(int enable_read_write) { - unsigned long start = (unsigned long)__init_begin; - unsigned long end = (unsigned long)_etext; + unsigned long start = (unsigned long) _text; + unsigned long end = (unsigned long) &data_start; map_pages(start, __pa(start), end-start, PAGE_KERNEL_RWX, enable_read_write ? 1:0); |