Commit 3c229b3f authored by Helge Deller's avatar Helge Deller

parisc: Fix map_pages() to not overwrite existing pte entries

Fix a long-existing small nasty bug in the map_pages() implementation which
leads to overwriting already written pte entries with zero, *if* map_pages() is
called a second time with an end address which isn't aligned on a pmd boundry.
This happens for example if we want to remap only the text segment read/write
in order to run alternative patching on the code. Exiting the loop when we
reach the end address fixes this.

Cc: stable@vger.kernel.org
Signed-off-by: default avatarHelge Deller <deller@gmx.de>
parent 4dd5b673
......@@ -494,12 +494,8 @@ static void __init map_pages(unsigned long start_vaddr,
pte = pte_mkhuge(pte);
}
if (address >= end_paddr) {
if (force)
if (address >= end_paddr)
break;
else
pte_val(pte) = 0;
}
set_pte(pg_table, pte);
......
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