On 11/6/24 5:44AM, Ryan Roberts wrote:
On 01/11/2024 20:16, Dave Kleikamp wrote:
When boot-time page size is enabled, the test against KMALLOC_MAX_CACHE_SIZE
is no longer optimized out with a constant size, so a build bug may
occur on a path that won't be reached.
Found compiling drivers/net/ethernet/qlogic/qed/qed_sriov.c
Signed-off-by: Dave Kleikamp <dave.kleikamp@xxxxxxxxxx>
---
Ryan,
Please consider incorporating this fix or something similar into your
mm patch in the boot-time pages size patches.
include/linux/slab.h | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/include/linux/slab.h b/include/linux/slab.h
index 9848296ca6ba..a4c7507ab8ec 100644
--- a/include/linux/slab.h
+++ b/include/linux/slab.h
@@ -685,7 +685,8 @@ static __always_inline unsigned int __kmalloc_index(size_t
size,
if (size <= 1024 * 1024) return 20;
if (size <= 2 * 1024 * 1024) return 21;
- if (!IS_ENABLED(CONFIG_PROFILE_ALL_BRANCHES) && size_is_constant)
+ if (!IS_ENABLED(CONFIG_ARM64_BOOT_TIME_PAGE_SIZE) &&
Thanks for the patch! I think this may be better as:
if (PAGE_SHIFT_MIN == PAGE_SHIFT_MAX &&
Since that is independent of the architecture. Your approach wouldn't work if
another arch wanted to enable boot time page size, or if arm64 dropped the
Kconfig because it decided only boot time page size will be supported in future.
Absolutely. I may be sending some more. I haven't gotten to JFS yet, but
that one is my responsibility.
Thanks,
Shaggy
Thanks,
Ryan
+ !IS_ENABLED(CONFIG_PROFILE_ALL_BRANCHES) && size_is_constant)
BUILD_BUG_ON_MSG(1, "unexpected size in kmalloc_index()");
else
BUG();
