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RISC-V Fixes for 5.18-rc6

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* A fix to properly ensure a single CPU is running during patch_text().
 * A defconfig update to include RPMSG_CTRL when RPMSG_CHAR was set,
   necessary after a recent refactoring.
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Merge tag 'riscv-for-linus-5.18-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux

Pull RISC-V fixes from Palmer Dabbelt:

 - A fix to properly ensure a single CPU is running during patch_text().

 - A defconfig update to include RPMSG_CTRL when RPMSG_CHAR was set,
   necessary after a recent refactoring.

* tag 'riscv-for-linus-5.18-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux:
  RISC-V: configs: Configs that had RPMSG_CHAR now get RPMSG_CTRL
  riscv: patch_text: Fixup last cpu should be master
This commit is contained in:
Linus Torvalds 2022-04-29 10:44:58 -07:00
commit 2d0de93ca2
3 changed files with 3 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
arch/riscv/configs/defconfig
View File

@ -101,6 +101,7 @@ CONFIG_VIRTIO_BALLOON=y
CONFIG_VIRTIO_INPUT=y
CONFIG_VIRTIO_MMIO=y
CONFIG_RPMSG_CHAR=y
CONFIG_RPMSG_CTRL=y
CONFIG_RPMSG_VIRTIO=y
CONFIG_EXT4_FS=y
CONFIG_EXT4_FS_POSIX_ACL=y

1
arch/riscv/configs/rv32_defconfig
View File

@ -93,6 +93,7 @@ CONFIG_VIRTIO_BALLOON=y
CONFIG_VIRTIO_INPUT=y
CONFIG_VIRTIO_MMIO=y
CONFIG_RPMSG_CHAR=y
CONFIG_RPMSG_CTRL=y
CONFIG_RPMSG_VIRTIO=y
CONFIG_EXT4_FS=y
CONFIG_EXT4_FS_POSIX_ACL=y

2
arch/riscv/kernel/patch.c
View File

@ -104,7 +104,7 @@ static int patch_text_cb(void *data)
struct patch_insn *patch = data;
int ret = 0;
if (atomic_inc_return(&patch->cpu_count) == 1) {
if (atomic_inc_return(&patch->cpu_count) == num_online_cpus()) {
ret =
patch_text_nosync(patch->addr, &patch->insn,
GET_INSN_LENGTH(patch->insn));