From: Nicholas Miehlbradt <nicholas@linux.ibm.com>
To: linuxppc-dev@lists.ozlabs.org
Cc: Nicholas Miehlbradt <nicholas@linux.ibm.com>
Subject: [PATCH v3 2/4] powerpc/64s: Remove unneeded #ifdef CONFIG_DEBUG_PAGEALLOC in hash_utils
Date: Mon, 26 Sep 2022 07:57:24 +0000 [thread overview]
Message-ID: <20220926075726.2846-2-nicholas@linux.ibm.com> (raw)
In-Reply-To: <20220926075726.2846-1-nicholas@linux.ibm.com>
From: Christophe Leroy <christophe.leroy@csgroup.eu>
debug_pagealloc_enabled() is always defined and constant folds to
'false' when CONFIG_DEBUG_PAGEALLOC is not enabled.
Remove the #ifdefs, the code and associated static variables will
be optimised out by the compiler when CONFIG_DEBUG_PAGEALLOC is
not defined.
Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Signed-off-by: Nicholas Miehlbradt <nicholas@linux.ibm.com>
---
arch/powerpc/mm/book3s64/hash_utils.c | 9 ++-------
1 file changed, 2 insertions(+), 7 deletions(-)
diff --git a/arch/powerpc/mm/book3s64/hash_utils.c b/arch/powerpc/mm/book3s64/hash_utils.c
index fc92613dc2bf..e63ff401a6ea 100644
--- a/arch/powerpc/mm/book3s64/hash_utils.c
+++ b/arch/powerpc/mm/book3s64/hash_utils.c
@@ -123,11 +123,8 @@ EXPORT_SYMBOL_GPL(mmu_slb_size);
#ifdef CONFIG_PPC_64K_PAGES
int mmu_ci_restrictions;
#endif
-#ifdef CONFIG_DEBUG_PAGEALLOC
static u8 *linear_map_hash_slots;
static unsigned long linear_map_hash_count;
-static DEFINE_SPINLOCK(linear_map_hash_lock);
-#endif /* CONFIG_DEBUG_PAGEALLOC */
struct mmu_hash_ops mmu_hash_ops;
EXPORT_SYMBOL(mmu_hash_ops);
@@ -427,11 +424,9 @@ int htab_bolt_mapping(unsigned long vstart, unsigned long vend,
break;
cond_resched();
-#ifdef CONFIG_DEBUG_PAGEALLOC
if (debug_pagealloc_enabled() &&
(paddr >> PAGE_SHIFT) < linear_map_hash_count)
linear_map_hash_slots[paddr >> PAGE_SHIFT] = ret | 0x80;
-#endif /* CONFIG_DEBUG_PAGEALLOC */
}
return ret < 0 ? ret : 0;
}
@@ -1066,7 +1061,6 @@ static void __init htab_initialize(void)
prot = pgprot_val(PAGE_KERNEL);
-#ifdef CONFIG_DEBUG_PAGEALLOC
if (debug_pagealloc_enabled()) {
linear_map_hash_count = memblock_end_of_DRAM() >> PAGE_SHIFT;
linear_map_hash_slots = memblock_alloc_try_nid(
@@ -1076,7 +1070,6 @@ static void __init htab_initialize(void)
panic("%s: Failed to allocate %lu bytes max_addr=%pa\n",
__func__, linear_map_hash_count, &ppc64_rma_size);
}
-#endif /* CONFIG_DEBUG_PAGEALLOC */
/* create bolted the linear mapping in the hash table */
for_each_mem_range(i, &base, &end) {
@@ -1991,6 +1984,8 @@ long hpte_insert_repeating(unsigned long hash, unsigned long vpn,
}
#ifdef CONFIG_DEBUG_PAGEALLOC
+static DEFINE_SPINLOCK(linear_map_hash_lock);
+
static void kernel_map_linear_page(unsigned long vaddr, unsigned long lmi)
{
unsigned long hash;
--
2.34.1
next prev parent reply other threads:[~2022-09-26 8:00 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-09-26 7:57 [PATCH v3 1/4] powerpc/64s: Add DEBUG_PAGEALLOC for radix Nicholas Miehlbradt
2022-09-26 7:57 ` Nicholas Miehlbradt [this message]
2022-09-26 7:57 ` [PATCH v3 3/4] powerpc/64s: Allow double call of kernel_[un]map_linear_page() Nicholas Miehlbradt
2022-09-26 7:57 ` [PATCH v3 4/4] powerpc/64s: Enable KFENCE on book3s64 Nicholas Miehlbradt
2022-09-27 0:30 ` Russell Currey
2022-10-04 13:25 ` [PATCH v3 1/4] powerpc/64s: Add DEBUG_PAGEALLOC for radix Michael Ellerman
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20220926075726.2846-2-nicholas@linux.ibm.com \
--to=nicholas@linux.ibm.com \
--cc=linuxppc-dev@lists.ozlabs.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).