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| author | Santosh Sivaraj <santosh@fossix.org> | 2019-08-20 13:43:49 +0530 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2019-08-21 22:23:48 +1000 |
| commit | 49ec9177b8ec9c081850744468811e708a7c9841 (patch) | |
| tree | 767d77f89b9faff60a9e8c965a3ec8d95061a86c /kernel/extable.c | |
| parent | 1a1715f516fd7fcfedffee5978ec4c07c5164470 (diff) | |
| download | lwn-49ec9177b8ec9c081850744468811e708a7c9841.tar.gz lwn-49ec9177b8ec9c081850744468811e708a7c9841.zip | |
extable: Add function to search only kernel exception table
Certain architecture specific operating modes (e.g., in powerpc machine
check handler that is unable to access vmalloc memory), the
search_exception_tables cannot be called because it also searches the
module exception tables if entry is not found in the kernel exception
table.
Signed-off-by: Santosh Sivaraj <santosh@fossix.org>
Reviewed-by: Nicholas Piggin <npiggin@gmail.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20190820081352.8641-5-santosh@fossix.org
Diffstat (limited to 'kernel/extable.c')
| -rw-r--r-- | kernel/extable.c | 11 |
1 files changed, 9 insertions, 2 deletions
diff --git a/kernel/extable.c b/kernel/extable.c index e23cce6e6092..f6c9406eec7d 100644 --- a/kernel/extable.c +++ b/kernel/extable.c @@ -40,13 +40,20 @@ void __init sort_main_extable(void) } } +/* Given an address, look for it in the kernel exception table */ +const +struct exception_table_entry *search_kernel_exception_table(unsigned long addr) +{ + return search_extable(__start___ex_table, + __stop___ex_table - __start___ex_table, addr); +} + /* Given an address, look for it in the exception tables. */ const struct exception_table_entry *search_exception_tables(unsigned long addr) { const struct exception_table_entry *e; - e = search_extable(__start___ex_table, - __stop___ex_table - __start___ex_table, addr); + e = search_kernel_exception_table(addr); if (!e) e = search_module_extables(addr); return e; |