[PATCH] MIPS: octeon: Get rid of preprocessor directives around RESERVE32

From: Alexander A Sverdlin
Date: Tue Sep 06 2022 - 03:53:08 EST


From: Alexander Sverdlin <alexander.sverdlin@xxxxxxxxx>

Some of them were pointless because CONFIG_CAVIUM_RESERVE32 is now always
defined, some were not enough (Yu Zhao reported [1]
"Failed to allocate CAVIUM_RESERVE32 memory area" error).

Removing (in contrast to proposal [2] though) the directives allows for
compiler coverage of RESERVE32 code and replacing one of [always-true]
"ifdef" with a compiler conditional fixes the [cosmetic] error message.

Couple of variables doesn't justify preprocessor ugliness and none of this
code is in a hot-path.

Link: https://lore.kernel.org/lkml/20220830030259.3503212-1-yuzhao@xxxxxxxxxx/
Link: https://lore.kernel.org/lkml/d5f8d6b58a32cdbf6326ccef7d46a58ba753edc7.camel@xxxxxxxxxxx/
Signed-off-by: Alexander Sverdlin <alexander.sverdlin@xxxxxxxxx>
---
arch/mips/cavium-octeon/executive/cvmx-cmd-queue.c | 4 ----
arch/mips/cavium-octeon/setup.c | 25 +++++++++-------------
2 files changed, 10 insertions(+), 19 deletions(-)

diff --git a/arch/mips/cavium-octeon/executive/cvmx-cmd-queue.c b/arch/mips/cavium-octeon/executive/cvmx-cmd-queue.c
index bf13e35..aa7bbf8 100644
--- a/arch/mips/cavium-octeon/executive/cvmx-cmd-queue.c
+++ b/arch/mips/cavium-octeon/executive/cvmx-cmd-queue.c
@@ -57,14 +57,11 @@ EXPORT_SYMBOL_GPL(__cvmx_cmd_queue_state_ptr);
static cvmx_cmd_queue_result_t __cvmx_cmd_queue_init_state_ptr(void)
{
char *alloc_name = "cvmx_cmd_queues";
-#if defined(CONFIG_CAVIUM_RESERVE32) && CONFIG_CAVIUM_RESERVE32
extern uint64_t octeon_reserve32_memory;
-#endif

if (likely(__cvmx_cmd_queue_state_ptr))
return CVMX_CMD_QUEUE_SUCCESS;

-#if defined(CONFIG_CAVIUM_RESERVE32) && CONFIG_CAVIUM_RESERVE32
if (octeon_reserve32_memory)
__cvmx_cmd_queue_state_ptr =
cvmx_bootmem_alloc_named_range(sizeof(*__cvmx_cmd_queue_state_ptr),
@@ -73,7 +70,6 @@ static cvmx_cmd_queue_result_t __cvmx_cmd_queue_init_state_ptr(void)
(CONFIG_CAVIUM_RESERVE32 <<
20) - 1, 128, alloc_name);
else
-#endif
__cvmx_cmd_queue_state_ptr =
cvmx_bootmem_alloc_named(sizeof(*__cvmx_cmd_queue_state_ptr),
128,
diff --git a/arch/mips/cavium-octeon/setup.c b/arch/mips/cavium-octeon/setup.c
index cbd8320..df45f76 100644
--- a/arch/mips/cavium-octeon/setup.c
+++ b/arch/mips/cavium-octeon/setup.c
@@ -284,10 +284,8 @@ void octeon_crash_smp_send_stop(void)

#endif /* CONFIG_KEXEC */

-#ifdef CONFIG_CAVIUM_RESERVE32
uint64_t octeon_reserve32_memory;
EXPORT_SYMBOL(octeon_reserve32_memory);
-#endif

#ifdef CONFIG_KEXEC
/* crashkernel cmdline parameter is parsed _after_ memory setup
@@ -666,9 +664,7 @@ void __init prom_init(void)
int i;
u64 t;
int argc;
-#ifdef CONFIG_CAVIUM_RESERVE32
int64_t addr = -1;
-#endif
/*
* The bootloader passes a pointer to the boot descriptor in
* $a3, this is available as fw_arg3.
@@ -783,7 +779,7 @@ void __init prom_init(void)
cvmx_write_csr(CVMX_LED_UDD_DATX(1), 0);
cvmx_write_csr(CVMX_LED_EN, 1);
}
-#ifdef CONFIG_CAVIUM_RESERVE32
+
/*
* We need to temporarily allocate all memory in the reserve32
* region. This makes sure the kernel doesn't allocate this
@@ -794,14 +790,15 @@ void __init prom_init(void)
* Allocate memory for RESERVED32 aligned on 2MB boundary. This
* is in case we later use hugetlb entries with it.
*/
- addr = cvmx_bootmem_phy_named_block_alloc(CONFIG_CAVIUM_RESERVE32 << 20,
- 0, 0, 2 << 20,
- "CAVIUM_RESERVE32", 0);
- if (addr < 0)
- pr_err("Failed to allocate CAVIUM_RESERVE32 memory area\n");
- else
- octeon_reserve32_memory = addr;
-#endif
+ if (CONFIG_CAVIUM_RESERVE32) {
+ addr = cvmx_bootmem_phy_named_block_alloc(CONFIG_CAVIUM_RESERVE32 << 20,
+ 0, 0, 2 << 20,
+ "CAVIUM_RESERVE32", 0);
+ if (addr < 0)
+ pr_err("Failed to allocate CAVIUM_RESERVE32 memory area\n");
+ else
+ octeon_reserve32_memory = addr;
+ }

#ifdef CONFIG_CAVIUM_OCTEON_LOCK_L2
if (cvmx_read_csr(CVMX_L2D_FUS3) & (3ull << 34)) {
@@ -1079,7 +1076,6 @@ void __init plat_mem_setup(void)
cvmx_bootmem_unlock();
#endif /* CONFIG_CRASH_DUMP */

-#ifdef CONFIG_CAVIUM_RESERVE32
/*
* Now that we've allocated the kernel memory it is safe to
* free the reserved region. We free it here so that builtin
@@ -1087,7 +1083,6 @@ void __init plat_mem_setup(void)
*/
if (octeon_reserve32_memory)
cvmx_bootmem_free_named("CAVIUM_RESERVE32");
-#endif /* CONFIG_CAVIUM_RESERVE32 */

if (total == 0)
panic("Unable to allocate memory from "
--
2.10.2