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scsi: ufs: core: Fix the build for gcc 9 and before

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gcc compilers before version 10 cannot do constant-folding for sub-byte
bitfields. This makes the compiler layout tests fail. Hence skip the layout
checks for gcc 9 and before.

Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Naresh Kamboju <naresh.kamboju@linaro.org>
Cc: Nathan Chancellor <nathan@kernel.org>
Reported-by: Naresh Kamboju <naresh.kamboju@linaro.org>
Closes: https://lore.kernel.org/linux-scsi/CA+G9fYur8UJoUyTLJFVEJPh-15TJ7kbdD2q8xVz8a3fLjkxxVw@mail.gmail.com/
Suggested-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Bart Van Assche <bvanassche@acm.org>
Link: https://lore.kernel.org/r/20230801232204.1481902-1-bvanassche@acm.org
Tested-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
Bart Van Assche
2023-08-01 16:21:50 -07:00
committed by Martin K. Petersen
parent 21f04fb4e8
commit c306f746fe
1 changed files with 8 additions and 0 deletions
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8
drivers/ufs/core/ufshcd.c
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@@ -10527,6 +10527,14 @@ static const struct dev_pm_ops ufshcd_wl_pm_ops = {
static void ufshcd_check_header_layout(void)
{
/*
* gcc compilers before version 10 cannot do constant-folding for
* sub-byte bitfields. Hence skip the layout checks for gcc 9 and
* before.
*/
if (IS_ENABLED(CONFIG_CC_IS_GCC) && CONFIG_GCC_VERSION < 100000)
return;
BUILD_BUG_ON(((u8 *)&(struct request_desc_header){
.cci = 3})[0] != 3);