linux - 即使存在 .config 也使内核提示配置选项

Question

我做到了

make ARCH=x86_64 x86_64_defconfig
make ARCH=x86_64 -j16

这对我来说很好。然后我需要启用 MMC/SD 卡支持，所以我执行了 make menuconfig 并选择了所需的选项。这是支持 SD 后我之前和当前配置的差异。

3056,3084c3056
< CONFIG_MMC=y
< # CONFIG_MMC_DEBUG is not set
< 
< #
< # MMC/SD/SDIO Card Drivers
< #
< CONFIG_MMC_BLOCK=y
< CONFIG_MMC_BLOCK_MINORS=8
< CONFIG_MMC_BLOCK_BOUNCE=y
< # CONFIG_SDIO_UART is not set
< # CONFIG_MMC_TEST is not set
< 
< #
< # MMC/SD/SDIO Host Controller Drivers
< #
< CONFIG_MMC_SDHCI=y
< # CONFIG_MMC_SDHCI_PCI is not set
< # CONFIG_MMC_SDHCI_ACPI is not set
< # CONFIG_MMC_SDHCI_PLTFM is not set
< # CONFIG_MMC_WBSD is not set
< # CONFIG_MMC_TIFM_SD is not set
< # CONFIG_MMC_SDRICOH_CS is not set
< # CONFIG_MMC_CB710 is not set
< # CONFIG_MMC_VIA_SDMMC is not set
< # CONFIG_MMC_VUB300 is not set
< # CONFIG_MMC_USHC is not set
< # CONFIG_MMC_USDHI6ROL0 is not set
< # CONFIG_MMC_TOSHIBA_PCI is not set
< # CONFIG_MMC_MTK is not set
---
> # CONFIG_MMC is not set

现在，当我执行 make ARCH=x86_64 -j16 时，它开始提示我进行配置设置 (y/n/M):

scripts/kconfig/conf  --silentoldconfig Kconfig
*
* Restart config...
*
*
* Timers subsystem
*
Timer tick handling
  1. Periodic timer ticks (constant rate, no dynticks) (HZ_PERIODIC)
> 2. Idle dynticks system (tickless idle) (NO_HZ_IDLE)
  3. Full dynticks system (tickless) (NO_HZ_FULL) (NEW)
choice[1-3]: 
Old Idle dynticks config (NO_HZ) [Y/n/?] y
High Resolution Timer Support (HIGH_RES_TIMERS) [Y/n/?] y
*
* CPU/Task time and stats accounting
*
Cputime accounting
> 1. Simple tick based cputime accounting (TICK_CPU_ACCOUNTING)
  2. Full dynticks CPU time accounting (VIRT_CPU_ACCOUNTING_GEN) (NEW)
choice[1-2]: 
.
. 
.

我最初认为我新启用的选项依赖于这些被询问的选项，但事实并非如此。现在我无法弄清楚为什么现在我开始收到这些提示？

Answer 1

如果使用，make 的ARCH 参数不仅在构建内核时需要，而且在配置内核时也需要:

make ARCH=x86_64 menuconfig

---

顺便说一句，您已经在其他配置步骤中使用了该参数:

make ARCH=x86_64 x86_64_defconfig