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authorArnd Bergmann <arnd@arndb.de>2021-09-27 15:18:03 +0300
committerHerbert Xu <herbert@gondor.apana.org.au>2021-10-08 15:02:37 +0300
commitcfd6fb45cfaf46fa9547421d8da387dc9c7997d4 (patch)
tree8112d33a63dc3ca2b101f7a415e9a792658e9b3e /drivers/crypto
parent183b60e005975d3c84c22199ca64a9221e620fb6 (diff)
downloadlinux-cfd6fb45cfaf46fa9547421d8da387dc9c7997d4.tar.xz
crypto: ccree - avoid out-of-range warnings from clang
clang points out inconsistencies in the FIELD_PREP() invocation in this driver that result from the 'mask' being a 32-bit value: drivers/crypto/ccree/cc_driver.c:117:18: error: result of comparison of constant 18446744073709551615 with expression of type 'u32' (aka 'unsigned int') is always false [-Werror,-Wtautological-constant-out-of-range-compare] cache_params |= FIELD_PREP(mask, val); ^~~~~~~~~~~~~~~~~~~~~ include/linux/bitfield.h:94:3: note: expanded from macro 'FIELD_PREP' __BF_FIELD_CHECK(_mask, 0ULL, _val, "FIELD_PREP: "); \ ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ include/linux/bitfield.h:52:28: note: expanded from macro '__BF_FIELD_CHECK' BUILD_BUG_ON_MSG((_mask) > (typeof(_reg))~0ull, \ ~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ This does not happen in other places that just pass a constant here. Work around the warnings by widening the type of the temporary variable. Fixes: 05c2a705917b ("crypto: ccree - rework cache parameters handling") Signed-off-by: Arnd Bergmann <arnd@arndb.de> Acked-by: Gilad ben-Yossef <gilad@benyossef.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Diffstat (limited to 'drivers/crypto')
-rw-r--r--drivers/crypto/ccree/cc_driver.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/crypto/ccree/cc_driver.c b/drivers/crypto/ccree/cc_driver.c
index e599ac6dc162..790fa9058a36 100644
--- a/drivers/crypto/ccree/cc_driver.c
+++ b/drivers/crypto/ccree/cc_driver.c
@@ -103,7 +103,8 @@ MODULE_DEVICE_TABLE(of, arm_ccree_dev_of_match);
static void init_cc_cache_params(struct cc_drvdata *drvdata)
{
struct device *dev = drvdata_to_dev(drvdata);
- u32 cache_params, ace_const, val, mask;
+ u32 cache_params, ace_const, val;
+ u64 mask;
/* compute CC_AXIM_CACHE_PARAMS */
cache_params = cc_ioread(drvdata, CC_REG(AXIM_CACHE_PARAMS));