Hi,
According to Documentation/cachetlb.txt flush_dcache_page should also be
called when the kernel _is about_ to read from a page and user space
shared&writable mappings of this page potentially exist. I think
kernel/ptrace.c should be fixed on this issue.
I already posted this patch on the lkml a few months ago, but it got lost
I guess.
Where should I send ptrace patches to in the future? Anyone out there who
maintains the ptrace stuff?
Frank.
--- ptrace.c.2.5.56 2003-01-13 14:31:45.000000000 +0100
+++ ptrace.c 2003-01-13 14:32:43.000000000 +0100
@@ -182,11 +182,11 @@
maddr = kmap(page);
if (write) {
memcpy(maddr + offset, buf, bytes);
- flush_page_to_ram(page);
+ flush_dcache_page(page);
flush_icache_user_range(vma, page, addr, bytes);
} else {
+ flush_dcache_page(page);
memcpy(buf, maddr + offset, bytes);
- flush_page_to_ram(page);
}
kunmap(page);
page_cache_release(page);
-
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This archive was generated by hypermail 2b29 : Wed Jan 15 2003 - 22:00:49 EST