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| author | Nicholas Piggin <npiggin@gmail.com> | 2022-09-16 14:07:49 +1000 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2022-09-26 20:58:16 +1000 |
| commit | 7082f8e7d2276575a8806370007cbb4a7b9abdce (patch) | |
| tree | 8b534ee44f283a58de7353121e364a7f9e524747 /arch/powerpc/mm/book3s32 | |
| parent | b150a4d12b919baf956b807aa305cf78df03d0fe (diff) | |
| download | lwn-7082f8e7d2276575a8806370007cbb4a7b9abdce.tar.gz lwn-7082f8e7d2276575a8806370007cbb4a7b9abdce.zip | |
powerpc: move __end_rodata to cover arch read-only sections
powerpc has a number of read-only sections and tables that are put after
RO_DATA(). Move the __end_rodata symbol to cover these as well.
Setting memory to read-only at boot is done using __init_begin, change
that to use __end_rodata.
This makes is_kernel_rodata() exactly cover the read-only region, as
well as other things using __end_rodata (e.g., kernel/dma/debug.c).
Boot dmesg also prints the rodata size more accurately.
Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20220916040755.2398112-2-npiggin@gmail.com
Diffstat (limited to 'arch/powerpc/mm/book3s32')
| -rw-r--r-- | arch/powerpc/mm/book3s32/mmu.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/powerpc/mm/book3s32/mmu.c b/arch/powerpc/mm/book3s32/mmu.c index 250d174459d4..e5ee05c234c7 100644 --- a/arch/powerpc/mm/book3s32/mmu.c +++ b/arch/powerpc/mm/book3s32/mmu.c @@ -240,7 +240,7 @@ void mmu_mark_rodata_ro(void) for (i = 0; i < nb; i++) { struct ppc_bat *bat = BATS[i]; - if (bat_addrs[i].start < (unsigned long)__init_begin) + if (bat_addrs[i].start < (unsigned long)__end_rodata) bat[1].batl = (bat[1].batl & ~BPP_RW) | BPP_RX; } |